[FFmpeg-devel] [PATCH v15 08/16] fftools/ffmpeg: Replace sub2video with subtitle frame filtering

Soft Works softworkz at hotmail.com
Thu Nov 25 19:52:22 EET 2021


This commit actually enables subtitle filtering in ffmpeg by
sending and receiving subtitle frames to and from a filtergraph.

The heartbeat functionality from the previous sub2video implementation
is retained and applied to all subtitle frames (bitmap, text, ..).

The other part of sub2video functionality is retained by
auto-insertion of the new graphicsub2video filter.

Justification for changed test refs:

- sub2video
  The new results are identical excepting the last frame which
  is due to the implementation changes

- sub2video_basic
  The previous results had some incorrect output because multiple
  frames had the same dts
  The non-empty content frames are visually identical, the different
  CRC is due to the different blending algorithm that is being used.

- sub2video_time_limited
  The third frame in the previous ref was a repetition, which doesn't
  happen anymore with the new subtitle filtering.

- sub-dvb
  Running ffprobe -show_frames on the source file shows that there
  are 7 subtitle frames with 0 rects in the source at the start
  and 2 at the end. This translates to the 14 and 4 additional
  entries in the new test results.

- filter-overlay-dvdsub-2397
  Overlay results have slightly different CRCs due to different
  blending implementation

Signed-off-by: softworkz <softworkz at hotmail.com>
---
 fftools/ffmpeg.c                          | 523 +++++++++++-----------
 fftools/ffmpeg.h                          |  15 +-
 fftools/ffmpeg_filter.c                   | 217 ++++++---
 fftools/ffmpeg_hw.c                       |   2 +-
 fftools/ffmpeg_opt.c                      |   3 +-
 tests/ref/fate/filter-overlay-dvdsub-2397 | 181 ++++----
 tests/ref/fate/sub-dvb                    | 162 ++++---
 tests/ref/fate/sub2video                  | 116 ++---
 tests/ref/fate/sub2video_basic            | 135 ++----
 tests/ref/fate/sub2video_time_limited     |   4 +-
 10 files changed, 684 insertions(+), 674 deletions(-)

diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index 3761ea0c38..c697c12777 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -169,163 +169,6 @@ static int restore_tty;
 static void free_input_threads(void);
 #endif
 
-/* sub2video hack:
-   Convert subtitles to video with alpha to insert them in filter graphs.
-   This is a temporary solution until libavfilter gets real subtitles support.
- */
-
-static int sub2video_get_blank_frame(InputStream *ist)
-{
-    int ret;
-    AVFrame *frame = ist->sub2video.frame;
-
-    av_frame_unref(frame);
-    ist->sub2video.frame->width  = ist->dec_ctx->width  ? ist->dec_ctx->width  : ist->sub2video.w;
-    ist->sub2video.frame->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
-    ist->sub2video.frame->format = AV_PIX_FMT_RGB32;
-    if ((ret = av_frame_get_buffer(frame, 0)) < 0)
-        return ret;
-    memset(frame->data[0], 0, frame->height * frame->linesize[0]);
-    return 0;
-}
-
-static void sub2video_copy_rect(uint8_t *dst, int dst_linesize, int w, int h,
-                                AVSubtitleRect *r)
-{
-    uint32_t *pal, *dst2;
-    uint8_t *src, *src2;
-    int x, y;
-
-    if (r->type != SUBTITLE_BITMAP) {
-        av_log(NULL, AV_LOG_WARNING, "sub2video: non-bitmap subtitle\n");
-        return;
-    }
-    if (r->x < 0 || r->x + r->w > w || r->y < 0 || r->y + r->h > h) {
-        av_log(NULL, AV_LOG_WARNING, "sub2video: rectangle (%d %d %d %d) overflowing %d %d\n",
-            r->x, r->y, r->w, r->h, w, h
-        );
-        return;
-    }
-
-    dst += r->y * dst_linesize + r->x * 4;
-    src = r->data[0];
-    pal = (uint32_t *)r->data[1];
-    for (y = 0; y < r->h; y++) {
-        dst2 = (uint32_t *)dst;
-        src2 = src;
-        for (x = 0; x < r->w; x++)
-            *(dst2++) = pal[*(src2++)];
-        dst += dst_linesize;
-        src += r->linesize[0];
-    }
-}
-
-static void sub2video_push_ref(InputStream *ist, int64_t pts)
-{
-    AVFrame *frame = ist->sub2video.frame;
-    int i;
-    int ret;
-
-    av_assert1(frame->data[0]);
-    ist->sub2video.last_pts = frame->pts = pts;
-    for (i = 0; i < ist->nb_filters; i++) {
-        ret = av_buffersrc_add_frame_flags(ist->filters[i]->filter, frame,
-                                           AV_BUFFERSRC_FLAG_KEEP_REF |
-                                           AV_BUFFERSRC_FLAG_PUSH);
-        if (ret != AVERROR_EOF && ret < 0)
-            av_log(NULL, AV_LOG_WARNING, "Error while add the frame to buffer source(%s).\n",
-                   av_err2str(ret));
-    }
-}
-
-void sub2video_update(InputStream *ist, int64_t heartbeat_pts, AVSubtitle *sub)
-{
-    AVFrame *frame = ist->sub2video.frame;
-    int8_t *dst;
-    int     dst_linesize;
-    int num_rects, i;
-    int64_t pts, end_pts;
-
-    if (!frame)
-        return;
-    if (sub) {
-        pts       = av_rescale_q(sub->pts + sub->start_display_time * 1000LL,
-                                 AV_TIME_BASE_Q, ist->st->time_base);
-        end_pts   = av_rescale_q(sub->pts + sub->end_display_time   * 1000LL,
-                                 AV_TIME_BASE_Q, ist->st->time_base);
-        num_rects = sub->num_rects;
-    } else {
-        /* If we are initializing the system, utilize current heartbeat
-           PTS as the start time, and show until the following subpicture
-           is received. Otherwise, utilize the previous subpicture's end time
-           as the fall-back value. */
-        pts       = ist->sub2video.initialize ?
-                    heartbeat_pts : ist->sub2video.end_pts;
-        end_pts   = INT64_MAX;
-        num_rects = 0;
-    }
-    if (sub2video_get_blank_frame(ist) < 0) {
-        av_log(ist->dec_ctx, AV_LOG_ERROR,
-               "Impossible to get a blank canvas.\n");
-        return;
-    }
-    dst          = frame->data    [0];
-    dst_linesize = frame->linesize[0];
-    for (i = 0; i < num_rects; i++)
-        sub2video_copy_rect(dst, dst_linesize, frame->width, frame->height, sub->rects[i]);
-    sub2video_push_ref(ist, pts);
-    ist->sub2video.end_pts = end_pts;
-    ist->sub2video.initialize = 0;
-}
-
-static void sub2video_heartbeat(InputStream *ist, int64_t pts)
-{
-    InputFile *infile = input_files[ist->file_index];
-    int i, j, nb_reqs;
-    int64_t pts2;
-
-    /* When a frame is read from a file, examine all sub2video streams in
-       the same file and send the sub2video frame again. Otherwise, decoded
-       video frames could be accumulating in the filter graph while a filter
-       (possibly overlay) is desperately waiting for a subtitle frame. */
-    for (i = 0; i < infile->nb_streams; i++) {
-        InputStream *ist2 = input_streams[infile->ist_index + i];
-        if (!ist2->sub2video.frame)
-            continue;
-        /* subtitles seem to be usually muxed ahead of other streams;
-           if not, subtracting a larger time here is necessary */
-        pts2 = av_rescale_q(pts, ist->st->time_base, ist2->st->time_base) - 1;
-        /* do not send the heartbeat frame if the subtitle is already ahead */
-        if (pts2 <= ist2->sub2video.last_pts)
-            continue;
-        if (pts2 >= ist2->sub2video.end_pts || ist2->sub2video.initialize)
-            /* if we have hit the end of the current displayed subpicture,
-               or if we need to initialize the system, update the
-               overlayed subpicture and its start/end times */
-            sub2video_update(ist2, pts2 + 1, NULL);
-        for (j = 0, nb_reqs = 0; j < ist2->nb_filters; j++)
-            nb_reqs += av_buffersrc_get_nb_failed_requests(ist2->filters[j]->filter);
-        if (nb_reqs)
-            sub2video_push_ref(ist2, pts2);
-    }
-}
-
-static void sub2video_flush(InputStream *ist)
-{
-    int i;
-    int ret;
-
-    if (ist->sub2video.end_pts < INT64_MAX)
-        sub2video_update(ist, INT64_MAX, NULL);
-    for (i = 0; i < ist->nb_filters; i++) {
-        ret = av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
-        if (ret != AVERROR_EOF && ret < 0)
-            av_log(NULL, AV_LOG_WARNING, "Flush the frame error.\n");
-    }
-}
-
-/* end of sub2video hack */
-
 static void term_exit_sigsafe(void)
 {
 #if HAVE_TERMIOS_H
@@ -526,7 +369,6 @@ static void ffmpeg_cleanup(int ret)
         avfilter_graph_free(&fg->graph);
         for (j = 0; j < fg->nb_inputs; j++) {
             InputFilter *ifilter = fg->inputs[j];
-            struct InputStream *ist = ifilter->ist;
 
             while (av_fifo_size(ifilter->frame_queue)) {
                 AVFrame *frame;
@@ -536,15 +378,6 @@ static void ffmpeg_cleanup(int ret)
             }
             av_fifo_freep(&ifilter->frame_queue);
             av_freep(&ifilter->displaymatrix);
-            if (ist->sub2video.sub_queue) {
-                while (av_fifo_size(ist->sub2video.sub_queue)) {
-                    AVSubtitle sub;
-                    av_fifo_generic_read(ist->sub2video.sub_queue,
-                                         &sub, sizeof(sub), NULL);
-                    avsubtitle_free(&sub);
-                }
-                av_fifo_freep(&ist->sub2video.sub_queue);
-            }
             av_buffer_unref(&ifilter->hw_frames_ctx);
             av_freep(&ifilter->name);
             av_freep(&fg->inputs[j]);
@@ -635,12 +468,14 @@ static void ffmpeg_cleanup(int ret)
         av_frame_free(&ist->decoded_frame);
         av_packet_free(&ist->pkt);
         av_dict_free(&ist->decoder_opts);
-        avsubtitle_free(&ist->prev_sub.subtitle);
-        av_frame_free(&ist->sub2video.frame);
+        av_frame_free(&ist->prev_sub.subtitle);
         av_freep(&ist->filters);
         av_freep(&ist->hwaccel_device);
         av_freep(&ist->dts_buffer);
 
+        av_frame_free(&ist->subtitle_heartbeat.recent_sub);
+        av_buffer_unref(&ist->subtitle_heartbeat.header);
+
         avcodec_free_context(&ist->dec_ctx);
 
         av_freep(&input_streams[i]);
@@ -1058,17 +893,21 @@ error:
     exit_program(1);
 }
 
-static void do_subtitle_out(OutputFile *of,
-                            OutputStream *ost,
-                            AVSubtitle *sub)
+static void do_subtitle_out(OutputFile *of, OutputStream *ost, AVFrame *frame)
 {
-    int subtitle_out_max_size = 1024 * 1024;
+    const int subtitle_out_max_size = 1024 * 1024;
     int subtitle_out_size, nb, i;
     AVCodecContext *enc;
     AVPacket *pkt = ost->pkt;
+    AVSubtitle out_sub = { 0 };
     int64_t pts;
 
-    if (sub->pts == AV_NOPTS_VALUE) {
+    if (!frame)
+        return;
+
+    av_log(NULL, AV_LOG_TRACE, "do_subtitle_out: sub->pts: %"PRId64"  frame->pts: %"PRId64"\n", frame->subtitle_pts, frame->pts);
+
+    if (frame->subtitle_pts == AV_NOPTS_VALUE) {
         av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
         if (exit_on_error)
             exit_program(1);
@@ -1094,51 +933,58 @@ static void do_subtitle_out(OutputFile *of,
         nb = 1;
 
     /* shift timestamp to honor -ss and make check_recording_time() work with -t */
-    pts = sub->pts;
+    pts = frame->subtitle_pts;
     if (output_files[ost->file_index]->start_time != AV_NOPTS_VALUE)
         pts -= output_files[ost->file_index]->start_time;
+
+    ost->sync_opts = av_rescale_q(pts, AV_TIME_BASE_Q, enc->time_base);
+    if (!check_recording_time(ost))
+        return;
+
+    frame->subtitle_pts = pts;
+    // subtitle_start_time is required to be 0
+    frame->subtitle_pts               += av_rescale_q(frame->subtitle_start_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
+    frame->subtitle_end_time  -= frame->subtitle_start_time;
+    frame->subtitle_start_time = 0;
+
+    av_frame_get_subtitle(&out_sub, frame);
+
     for (i = 0; i < nb; i++) {
-        unsigned save_num_rects = sub->num_rects;
+        const unsigned save_num_rects = out_sub.num_rects;
 
-        ost->sync_opts = av_rescale_q(pts, AV_TIME_BASE_Q, enc->time_base);
-        if (!check_recording_time(ost))
-            return;
+        ost->frames_encoded++;
 
-        sub->pts = pts;
-        // start_display_time is required to be 0
-        sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
-        sub->end_display_time  -= sub->start_display_time;
-        sub->start_display_time = 0;
         if (i == 1)
-            sub->num_rects = 0;
+            out_sub.num_rects = 0;
 
-        ost->frames_encoded++;
+        subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out, subtitle_out_max_size, &out_sub);
 
-        subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
-                                                    subtitle_out_max_size, sub);
         if (i == 1)
-            sub->num_rects = save_num_rects;
+            out_sub.num_rects = save_num_rects;
+
         if (subtitle_out_size < 0) {
             av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
             exit_program(1);
         }
 
-        av_packet_unref(pkt);
+        //av_packet_unref(pkt);
         pkt->data = subtitle_out;
         pkt->size = subtitle_out_size;
-        pkt->pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->mux_timebase);
-        pkt->duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->mux_timebase);
+        pkt->pts  = av_rescale_q(frame->subtitle_pts, AV_TIME_BASE_Q, ost->mux_timebase);
+        pkt->duration = av_rescale_q(frame->subtitle_end_time, (AVRational){ 1, 1000 }, ost->mux_timebase);
         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
             /* XXX: the pts correction is handled here. Maybe handling
                it in the codec would be better */
             if (i == 0)
-                pkt->pts += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, ost->mux_timebase);
+                pkt->pts += av_rescale_q(frame->subtitle_start_time, (AVRational){ 1, 1000 }, ost->mux_timebase);
             else
-                pkt->pts += av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->mux_timebase);
+                pkt->pts += av_rescale_q(frame->subtitle_end_time, (AVRational){ 1, 1000 }, ost->mux_timebase);
         }
         pkt->dts = pkt->pts;
         output_packet(of, pkt, ost, 0);
     }
+
+    avsubtitle_free(&out_sub);
 }
 
 static void do_video_out(OutputFile *of,
@@ -1568,8 +1414,26 @@ static int reap_filters(int flush)
                 }
                 do_audio_out(of, ost, filtered_frame);
                 break;
+            case AVMEDIA_TYPE_SUBTITLE:
+
+                if (filtered_frame->format == AV_SUBTITLE_FMT_ASS && !enc->subtitle_header 
+                    && filtered_frame->subtitle_header) {
+                    const char *subtitle_header = (char *)filtered_frame->subtitle_header->data;
+                    enc->subtitle_header = (uint8_t *)av_strdup(subtitle_header);
+                    if (!enc->subtitle_header)
+                        return AVERROR(ENOMEM);
+                    enc->subtitle_header_size = strlen(subtitle_header);
+                }
+
+                if ((ost->enc_ctx->width == 0 || ost->enc_ctx->height == 0)
+                    && filter->inputs[0]->w > 0 && filter->inputs[0]->h > 0 ) {
+                    ost->enc_ctx->width = filter->inputs[0]->w;
+                    ost->enc_ctx->height = filter->inputs[0]->h;
+                }
+                    
+                do_subtitle_out(of, ost, filtered_frame);
+                break;
             default:
-                // TODO support subtitle filters
                 av_assert0(0);
             }
 
@@ -1972,6 +1836,9 @@ static void flush_encoders(void)
             AVPacket *pkt = ost->pkt;
             int pkt_size;
 
+            if (!pkt)
+                break;
+
             switch (enc->codec_type) {
             case AVMEDIA_TYPE_AUDIO:
                 desc   = "audio";
@@ -2164,7 +2031,8 @@ static int ifilter_has_all_input_formats(FilterGraph *fg)
     int i;
     for (i = 0; i < fg->nb_inputs; i++) {
         if (fg->inputs[i]->format < 0 && (fg->inputs[i]->type == AVMEDIA_TYPE_AUDIO ||
-                                          fg->inputs[i]->type == AVMEDIA_TYPE_VIDEO))
+                                          fg->inputs[i]->type == AVMEDIA_TYPE_VIDEO ||
+                                          fg->inputs[i]->type == AVMEDIA_TYPE_SUBTITLE))
             return 0;
     }
     return 1;
@@ -2269,7 +2137,7 @@ static int ifilter_send_eof(InputFilter *ifilter, int64_t pts)
         // the filtergraph was never configured
         if (ifilter->format < 0)
             ifilter_parameters_from_codecpar(ifilter, ifilter->ist->st->codecpar);
-        if (ifilter->format < 0 && (ifilter->type == AVMEDIA_TYPE_AUDIO || ifilter->type == AVMEDIA_TYPE_VIDEO)) {
+        if (ifilter->format < 0 && (ifilter->type == AVMEDIA_TYPE_AUDIO || ifilter->type == AVMEDIA_TYPE_VIDEO || ifilter->type == AVMEDIA_TYPE_SUBTITLE)) {
             av_log(NULL, AV_LOG_ERROR, "Cannot determine format of input stream %d:%d after EOF\n", ifilter->ist->file_index, ifilter->ist->st->index);
             return AVERROR_INVALIDDATA;
         }
@@ -2307,7 +2175,8 @@ static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacke
 
 static int send_frame_to_filters(InputStream *ist, AVFrame *decoded_frame)
 {
-    int i, ret;
+    int i, ret = 0;
+    AVFrame *f;
 
     av_assert1(ist->nb_filters > 0); /* ensure ret is initialized */
     for (i = 0; i < ist->nb_filters; i++) {
@@ -2508,81 +2377,214 @@ fail:
     return err < 0 ? err : ret;
 }
 
-static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output,
+static void subtitle_resend_current(InputStream *ist, int64_t heartbeat_pts)
+{
+    AVFrame *frame;
+    int64_t pts, end_pts;
+
+    if (ist->subtitle_heartbeat.recent_sub) {
+        frame = av_frame_clone(ist->subtitle_heartbeat.recent_sub);
+
+        pts     = heartbeat_pts; //av_rescale_q(frame->subtitle_pts + frame->subtitle_start_time * 1000LL, AV_TIME_BASE_Q, ist->st->time_base);
+        end_pts = av_rescale_q(frame->subtitle_pts + frame->subtitle_end_time   * 1000LL, AV_TIME_BASE_Q, ist->st->time_base);
+    }
+    else {
+        frame = av_frame_alloc();
+        if (!frame) {
+            av_log(ist->dec_ctx, AV_LOG_ERROR, "Unable to alloc frame (out of memory).\n");
+            return;
+        }
+
+        frame->type = AVMEDIA_TYPE_SUBTITLE;
+        frame->format = av_get_subtitle_format_from_codecdesc(ist->dec_ctx->codec_descriptor);
+
+        av_frame_get_buffer2(frame, 0);
+
+        frame->width = ist->subtitle_heartbeat.w;
+        frame->height = ist->subtitle_heartbeat.h;
+
+        pts       = (ist->subtitle_heartbeat.end_pts < INT64_MAX && ist->subtitle_heartbeat.end_pts > 0)
+                    ? ist->subtitle_heartbeat.end_pts : heartbeat_pts;
+        end_pts   = INT64_MAX;
+
+        frame->subtitle_pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
+        frame->subtitle_end_time = 1000;
+    }
+
+    ////av_log(NULL, AV_LOG_WARNING, "subtitle_heartbeat: call subtitle_resend_current %"PRId64" \n", pts);
+
+    frame->pts = pts;
+    ist->subtitle_heartbeat.last_pts = pts;
+    ist->subtitle_heartbeat.end_pts = end_pts;
+
+    send_frame_to_filters(ist, frame);
+}
+
+static void subtitle_heartbeat(InputStream *ist, int64_t pts)
+{
+    int i;
+    int64_t pts2;
+
+    if (ist->st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
+        return;
+
+    /* When a frame is read from a file, examine all subtitle streams in
+       the same file and send the subtitle frame again. Otherwise, decoded
+       video frames could be accumulating in the filter graph while a filter
+       (possibly overlay) is desperately waiting for a subtitle frame. */
+    for (i = 0; i < nb_input_streams; i++) {
+        InputStream *ist2 = input_streams[i];
+        if (!ist2->subtitle_heartbeat.is_active)
+            continue;
+        /* subtitles seem to be usually muxed ahead of other streams;
+           if not, subtracting a larger time here is necessary */
+        pts2 = av_rescale_q(pts, ist->st->time_base, ist2->st->time_base) - 1;
+        /* do not send the heartbeat frame if the subtitle is already ahead */
+        if (pts2 <= ist2->subtitle_heartbeat.last_pts)
+            continue;
+        if (pts2 >= ist2->subtitle_heartbeat.end_pts) {
+            /* if we have hit the end of the current displayed subpicture,
+               or if we need to initialize the system, update the
+               overlayed subpicture and its start/end times */
+            if (ist2->subtitle_heartbeat.recent_sub)
+                av_frame_free(&ist2->subtitle_heartbeat.recent_sub);
+
+            av_log(NULL, AV_LOG_DEBUG, "subtitle_heartbeat: clear + resend - pts: %"PRIi64"\n", pts2 + 1);
+            subtitle_resend_current(ist2, pts2 + 1);
+            continue;
+        }
+        if (!ist2->subtitle_heartbeat.check_buffer_requests) {
+            unsigned j, nb_reqs;
+            for (j = 0, nb_reqs = 0; j < ist2->nb_filters; j++)
+                nb_reqs += av_buffersrc_get_nb_failed_requests(ist2->filters[j]->filter);
+            if (nb_reqs) {
+                av_log(NULL, AV_LOG_DEBUG, "subtitle_heartbeat: resend - pts: %"PRIi64"\n", pts2);
+                subtitle_resend_current(ist2, pts2);
+            }
+        }
+    }
+}
+
+static InputStream *get_input_stream(OutputStream *ost)
+{
+    if (ost->source_index >= 0)
+        return input_streams[ost->source_index];
+    return NULL;
+}
+
+static int decode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output,
                                int *decode_failed)
 {
-    AVSubtitle subtitle;
-    int free_sub = 1;
-    int i, ret = avcodec_decode_subtitle2(ist->dec_ctx,
-                                          &subtitle, got_output, pkt);
+    AVFrame *decoded_frame;
+    AVCodecContext *avctx = ist->dec_ctx;
+    int i = 0, ret = 0, err = 0;
+    int64_t pts, end_pts;
+
+    if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
+        return AVERROR(ENOMEM);
+    decoded_frame = ist->decoded_frame;
+    decoded_frame->type = AVMEDIA_TYPE_SUBTITLE;
+    decoded_frame->format = av_get_subtitle_format_from_codecdesc(avctx->codec_descriptor);
 
-    check_decode_result(NULL, got_output, ret);
+    if (!ist->subtitle_heartbeat.header && avctx->subtitle_header && avctx->subtitle_header_size > 0) {
+        ist->subtitle_heartbeat.header = av_buffer_allocz(avctx->subtitle_header_size + 1);
+        if (!ist->subtitle_heartbeat.header)
+            return AVERROR(ENOMEM);
+        memcpy(ist->subtitle_heartbeat.header->data, avctx->subtitle_header, avctx->subtitle_header_size);
+    }
+
+    ret = decode(avctx, decoded_frame, got_output, pkt);
+
+    if (ret != AVERROR_EOF)
+        check_decode_result(NULL, got_output, ret);
 
     if (ret < 0 || !*got_output) {
         *decode_failed = 1;
-        if (!pkt->size)
-            sub2video_flush(ist);
+        if (!pkt->size) {
+            // Flush
+            for (i = 0; i < ist->nb_filters; i++) {
+                ret = av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
+                if (ret != AVERROR_EOF && ret < 0)
+                    av_log(NULL, AV_LOG_WARNING, "Flush the frame error.\n");
+            }
+        }
         return ret;
     }
 
     if (ist->fix_sub_duration) {
         int end = 1;
-        if (ist->prev_sub.got_output) {
-            end = av_rescale(subtitle.pts - ist->prev_sub.subtitle.pts,
+        if (ist->prev_sub.got_output && ist->prev_sub.subtitle) {
+            end = av_rescale(decoded_frame->subtitle_pts - ist->prev_sub.subtitle->subtitle_pts,
                              1000, AV_TIME_BASE);
-            if (end < ist->prev_sub.subtitle.end_display_time) {
-                av_log(ist->dec_ctx, AV_LOG_DEBUG,
+            if (end < ist->prev_sub.subtitle->subtitle_end_time) {
+                av_log(avctx, AV_LOG_DEBUG,
                        "Subtitle duration reduced from %"PRId32" to %d%s\n",
-                       ist->prev_sub.subtitle.end_display_time, end,
+                       ist->prev_sub.subtitle->subtitle_end_time, end,
                        end <= 0 ? ", dropping it" : "");
-                ist->prev_sub.subtitle.end_display_time = end;
+                ist->prev_sub.subtitle->subtitle_end_time = end;
             }
         }
         FFSWAP(int,        *got_output, ist->prev_sub.got_output);
         FFSWAP(int,        ret,         ist->prev_sub.ret);
-        FFSWAP(AVSubtitle, subtitle,    ist->prev_sub.subtitle);
+        FFSWAP(AVFrame*,   decoded_frame, ist->prev_sub.subtitle);
         if (end <= 0)
-            goto out;
+            return end;
     }
 
-    if (!*got_output)
+    if (!*got_output || !decoded_frame)
         return ret;
 
-    if (ist->sub2video.frame) {
-        sub2video_update(ist, INT64_MIN, &subtitle);
-    } else if (ist->nb_filters) {
-        if (!ist->sub2video.sub_queue)
-            ist->sub2video.sub_queue = av_fifo_alloc(8 * sizeof(AVSubtitle));
-        if (!ist->sub2video.sub_queue)
-            exit_program(1);
-        if (!av_fifo_space(ist->sub2video.sub_queue)) {
-            ret = av_fifo_realloc2(ist->sub2video.sub_queue, 2 * av_fifo_size(ist->sub2video.sub_queue));
-            if (ret < 0)
-                exit_program(1);
-        }
-        av_fifo_generic_write(ist->sub2video.sub_queue, &subtitle, sizeof(subtitle), NULL);
-        free_sub = 0;
-    }
+    decoded_frame->type = AVMEDIA_TYPE_SUBTITLE;
+    decoded_frame->format = av_get_subtitle_format_from_codecdesc(avctx->codec_descriptor);
 
-    if (!subtitle.num_rects)
-        goto out;
+    ////if ((ret = av_frame_get_buffer2(decoded_frame, 0)) < 0)
+    ////    return ret;
 
-    ist->frames_decoded++;
+    if ((ret = av_buffer_replace(&decoded_frame->subtitle_header, ist->subtitle_heartbeat.header)) < 0)
+        return ret;
 
-    for (i = 0; i < nb_output_streams; i++) {
-        OutputStream *ost = output_streams[i];
+    pts     = av_rescale_q(decoded_frame->subtitle_pts + decoded_frame->subtitle_start_time * 1000LL,
+                           AV_TIME_BASE_Q, ist->st->time_base);
+    end_pts = av_rescale_q(decoded_frame->subtitle_pts + decoded_frame->subtitle_end_time   * 1000LL,
+                             AV_TIME_BASE_Q, ist->st->time_base);
 
-        if (!check_output_constraints(ist, ost) || !ost->encoding_needed
-            || ost->enc->type != AVMEDIA_TYPE_SUBTITLE)
-            continue;
+    ist->subtitle_heartbeat.last_pts = decoded_frame->pts = pts;
+    ist->subtitle_heartbeat.end_pts = end_pts;
 
-        do_subtitle_out(output_files[ost->file_index], ost, &subtitle);
+    if (ist->nb_filters > 0) {
+        AVFrame *filter_frame = av_frame_clone(decoded_frame);
+        if (!filter_frame)
+            err = AVERROR(ENOMEM);
+        else
+            err = send_frame_to_filters(ist, filter_frame);
     }
 
-out:
-    if (free_sub)
-        avsubtitle_free(&subtitle);
-    return ret;
+    if (err >= 0) {
+        for (i = 0; i < nb_output_streams; i++) {
+            OutputStream *ost = output_streams[i];
+            InputStream *ist_src = get_input_stream(ost);
+
+            if (!ist_src || !check_output_constraints(ist, ost) 
+                || ist_src != ist
+                || !ost->encoding_needed
+                || ost->enc->type != AVMEDIA_TYPE_SUBTITLE)
+                continue;
+
+            if (ost->filter && ost->filter->filter->nb_inputs > 0)
+                continue;
+
+            ////if (!ost->pkt && !((ost->pkt = av_packet_alloc())))
+            ////    exit_program(1);
+            do_subtitle_out(output_files[ost->file_index], ost, decoded_frame);
+        }
+    }
+
+    av_frame_free(&ist->subtitle_heartbeat.recent_sub);
+    ist->subtitle_heartbeat.recent_sub = av_frame_clone(decoded_frame);
+
+
+    av_frame_unref(decoded_frame);
+    return err < 0 ? err : ret;
 }
 
 static int send_filter_eof(InputStream *ist)
@@ -2686,7 +2688,7 @@ static int process_input_packet(InputStream *ist, const AVPacket *pkt, int no_eo
         case AVMEDIA_TYPE_SUBTITLE:
             if (repeating)
                 break;
-            ret = transcode_subtitles(ist, avpkt, &got_output, &decode_failed);
+            ret = decode_subtitles(ist, avpkt, &got_output, &decode_failed);
             if (!pkt && ret >= 0)
                 ret = AVERROR_EOF;
             av_packet_unref(avpkt);
@@ -2977,13 +2979,6 @@ FF_ENABLE_DEPRECATION_WARNINGS
     return 0;
 }
 
-static InputStream *get_input_stream(OutputStream *ost)
-{
-    if (ost->source_index >= 0)
-        return input_streams[ost->source_index];
-    return NULL;
-}
-
 static int compare_int64(const void *a, const void *b)
 {
     return FFDIFFSIGN(*(const int64_t *)a, *(const int64_t *)b);
@@ -3462,7 +3457,7 @@ static int init_output_stream_encode(OutputStream *ost, AVFrame *frame)
         break;
     case AVMEDIA_TYPE_SUBTITLE:
         enc_ctx->time_base = AV_TIME_BASE_Q;
-        if (!enc_ctx->width) {
+        if (!enc_ctx->width && ost->source_index >= 0) {
             enc_ctx->width     = input_streams[ost->source_index]->st->codecpar->width;
             enc_ctx->height    = input_streams[ost->source_index]->st->codecpar->height;
         }
@@ -3515,19 +3510,14 @@ static int init_output_stream(OutputStream *ost, AVFrame *frame,
         }
 
         if (ist && ist->dec->type == AVMEDIA_TYPE_SUBTITLE && ost->enc->type == AVMEDIA_TYPE_SUBTITLE) {
-            int input_props = 0, output_props = 0;
-            AVCodecDescriptor const *input_descriptor =
-                avcodec_descriptor_get(dec->codec_id);
-            AVCodecDescriptor const *output_descriptor =
-                avcodec_descriptor_get(ost->enc_ctx->codec_id);
-            if (input_descriptor)
-                input_props = input_descriptor->props & (AV_CODEC_PROP_TEXT_SUB | AV_CODEC_PROP_BITMAP_SUB);
-            if (output_descriptor)
-                output_props = output_descriptor->props & (AV_CODEC_PROP_TEXT_SUB | AV_CODEC_PROP_BITMAP_SUB);
-            if (input_props && output_props && input_props != output_props) {
-                snprintf(error, error_len,
-                         "Subtitle encoding currently only possible from text to text "
-                         "or bitmap to bitmap");
+            AVCodecDescriptor const *input_descriptor     = avcodec_descriptor_get(dec->codec_id);
+            AVCodecDescriptor const *output_descriptor    = avcodec_descriptor_get(ost->enc_ctx->codec_id);
+            const enum AVSubtitleType in_subtitle_format  = output_descriptor ? av_get_subtitle_format_from_codecdesc(input_descriptor) : AV_SUBTITLE_FMT_UNKNOWN;
+            const enum AVSubtitleType out_subtitle_format = output_descriptor ? av_get_subtitle_format_from_codecdesc(output_descriptor) : AV_SUBTITLE_FMT_UNKNOWN;
+
+            if (ist->nb_filters == 0 && in_subtitle_format != AV_SUBTITLE_FMT_UNKNOWN && out_subtitle_format != AV_SUBTITLE_FMT_UNKNOWN
+                && in_subtitle_format != out_subtitle_format) {
+                snprintf(error, error_len, "Subtitle encoding is only possible from text to text or bitmap to bitmap");
                 return AVERROR_INVALIDDATA;
             }
         }
@@ -4528,7 +4518,7 @@ static int process_input(int file_index)
                av_ts2timestr(input_files[ist->file_index]->ts_offset, &AV_TIME_BASE_Q));
     }
 
-    sub2video_heartbeat(ist, pkt->pts);
+    subtitle_heartbeat(ist, pkt->pts);
 
     process_input_packet(ist, pkt, 0);
 
@@ -4740,6 +4730,7 @@ static int transcode(void)
     /* at the end of stream, we must flush the decoder buffers */
     for (i = 0; i < nb_input_streams; i++) {
         ist = input_streams[i];
+        ist->subtitle_heartbeat.is_active = 0;
         if (!input_files[ist->file_index]->eof_reached) {
             process_input_packet(ist, NULL, 0);
         }
diff --git a/fftools/ffmpeg.h b/fftools/ffmpeg.h
index 1728010f56..8a7080834a 100644
--- a/fftools/ffmpeg.h
+++ b/fftools/ffmpeg.h
@@ -349,17 +349,18 @@ typedef struct InputStream {
     struct { /* previous decoded subtitle and related variables */
         int got_output;
         int ret;
-        AVSubtitle subtitle;
+        AVFrame *subtitle;
     } prev_sub;
 
-    struct sub2video {
+    struct subtitle_heartbeat {
+        int is_active;
+        int check_buffer_requests;
         int64_t last_pts;
         int64_t end_pts;
-        AVFifoBuffer *sub_queue;    ///< queue of AVSubtitle* before filter init
-        AVFrame *frame;
+        AVFrame *recent_sub;
         int w, h;
-        unsigned int initialize; ///< marks if sub2video_update should force an initialization
-    } sub2video;
+        AVBufferRef *header;
+    } subtitle_heartbeat;
 
     /* decoded data from this stream goes into all those filters
      * currently video and audio only */
@@ -659,8 +660,6 @@ int filtergraph_is_simple(FilterGraph *fg);
 int init_simple_filtergraph(InputStream *ist, OutputStream *ost);
 int init_complex_filtergraph(FilterGraph *fg);
 
-void sub2video_update(InputStream *ist, int64_t heartbeat_pts, AVSubtitle *sub);
-
 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame);
 
 int ffmpeg_parse_options(int argc, char **argv);
diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c
index 452b689d62..1299529d36 100644
--- a/fftools/ffmpeg_filter.c
+++ b/fftools/ffmpeg_filter.c
@@ -22,6 +22,8 @@
 
 #include "ffmpeg.h"
 
+#include <libavutil/ass_split_internal.h>
+
 #include "libavfilter/avfilter.h"
 #include "libavfilter/buffersink.h"
 #include "libavfilter/buffersrc.h"
@@ -30,11 +32,9 @@
 #include "libavutil/avstring.h"
 #include "libavutil/bprint.h"
 #include "libavutil/channel_layout.h"
-#include "libavutil/display.h"
 #include "libavutil/opt.h"
 #include "libavutil/pixdesc.h"
 #include "libavutil/pixfmt.h"
-#include "libavutil/imgutils.h"
 #include "libavutil/samplefmt.h"
 
 // FIXME: YUV420P etc. are actually supported with full color range,
@@ -221,9 +221,8 @@ static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
     int i;
 
-    // TODO: support other filter types
-    if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
-        av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
+    if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO && type != AVMEDIA_TYPE_SUBTITLE) {
+        av_log(NULL, AV_LOG_FATAL, "Only video, audio and subtitle filters supported "
                "currently.\n");
         exit_program(1);
     }
@@ -244,8 +243,9 @@ static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
         for (i = 0; i < s->nb_streams; i++) {
             enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
             if (stream_type != type &&
-                !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
-                  type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
+                // in the followng case we auto-insert the graphicsub2video conversion filter 
+                // for retaining compatibility with the previous sub2video hack
+                !(stream_type == AVMEDIA_TYPE_SUBTITLE && type == AVMEDIA_TYPE_VIDEO))
                 continue;
             if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
                 st = s->streams[i];
@@ -294,6 +294,13 @@ static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
     fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
     fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
 
+    if (ist->st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE && ist->dec_ctx) {
+        const AVCodecDescriptor *codec_descriptor = ist->dec_ctx->codec_descriptor;
+        if (!codec_descriptor)
+            codec_descriptor = avcodec_descriptor_get(ist->dec_ctx->codec_id);
+        fg->inputs[fg->nb_inputs - 1]->format = av_get_subtitle_format_from_codecdesc(codec_descriptor);
+    }
+
     fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
     if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
         exit_program(1);
@@ -416,6 +423,39 @@ static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
     return 0;
 }
 
+static int configure_output_subtitle_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
+{
+    OutputStream *ost = ofilter->ost;
+    AVFilterContext *last_filter = out->filter_ctx;
+    int pad_idx = out->pad_idx;
+    int ret;
+    char name[255];
+
+    snprintf(name, sizeof(name), "out_%d_%d", ost->file_index, ost->index);
+    ret = avfilter_graph_create_filter(&ofilter->filter,
+                                       avfilter_get_by_name("sbuffersink"),
+                                       name, NULL, NULL, fg->graph);
+
+    if (ret < 0) {
+        av_log(NULL, AV_LOG_ERROR, "Unable to create filter sbuffersink\n");
+        return ret;
+    }
+
+    ////snprintf(name, sizeof(name), "trim_out_%d_%d",
+    ////         ost->file_index, ost->index);
+    ////ret = insert_trim(of->start_time, of->recording_time,
+    ////                  &last_filter, &pad_idx, name);
+    ////if (ret < 0)
+    ////    return ret;
+
+    ////ost->st->codecpar->codec_tag = MKTAG('a', 's', 's', 's');
+
+    if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
+        return ret;
+
+    return 0;
+}
+
 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
 {
     char *pix_fmts;
@@ -594,7 +634,8 @@ static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter,
         int i;
 
         for (i=0; i<of->ctx->nb_streams; i++)
-            if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
+            if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ||
+                of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
                 break;
 
         if (i<of->ctx->nb_streams) {
@@ -628,6 +669,7 @@ static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter,
     switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
     case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
     case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
+    case AVMEDIA_TYPE_SUBTITLE: return configure_output_subtitle_filter(fg, ofilter, out);
     default: av_assert0(0); return 0;
     }
 }
@@ -647,51 +689,112 @@ void check_filter_outputs(void)
     }
 }
 
-static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
+static int configure_input_subtitle_filter(FilterGraph *fg, InputFilter *ifilter,
+                                        AVFilterInOut *in)
 {
-    AVFormatContext *avf = input_files[ist->file_index]->ctx;
-    int i, w, h;
+    AVFilterContext *last_filter;
+    const AVFilter *buffer_filt = avfilter_get_by_name("sbuffer");
+    InputStream *ist = ifilter->ist;
+    AVBPrint args;
+    char name[255];
+    int ret, pad_idx = 0;
+    int w, h;
+    AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
+    enum AVMediaType media_type;
+
+    if (!par)
+        return AVERROR(ENOMEM);
+    memset(par, 0, sizeof(*par));
+    par->format = AV_PIX_FMT_NONE;
+
+    if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
+        av_log(NULL, AV_LOG_ERROR, "Cannot connect subtitle filter to audio input\n");
+        ret = AVERROR(EINVAL);
+        goto fail;
+    }
+
+    if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) {
+        av_log(NULL, AV_LOG_ERROR, "Cannot connect subtitle filter to video input\n");
+        ret = AVERROR(EINVAL);
+        goto fail;
+    }
+
+    if (!ist->subtitle_heartbeat.header && ist->dec_ctx->subtitle_header && ist->dec_ctx->subtitle_header_size > 0) {
+        ist->subtitle_heartbeat.header = av_buffer_allocz(ist->dec_ctx->subtitle_header_size + 1);
+        if (!ist->subtitle_heartbeat.header)
+            return AVERROR(ENOMEM);
+        memcpy(ist->subtitle_heartbeat.header->data, ist->dec_ctx->subtitle_header, ist->dec_ctx->subtitle_header_size);
+    }
+
+    ist->subtitle_heartbeat.is_active = 1;
 
-    /* Compute the size of the canvas for the subtitles stream.
-       If the subtitles codecpar has set a size, use it. Otherwise use the
-       maximum dimensions of the video streams in the same file. */
     w = ifilter->width;
     h = ifilter->height;
+
     if (!(w && h)) {
-        for (i = 0; i < avf->nb_streams; i++) {
-            if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
-                w = FFMAX(w, avf->streams[i]->codecpar->width);
-                h = FFMAX(h, avf->streams[i]->codecpar->height);
-            }
-        }
-        if (!(w && h)) {
-            w = FFMAX(w, 720);
-            h = FFMAX(h, 576);
-        }
-        av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
+        w = ist->dec_ctx->width;
+        h = ist->dec_ctx->height;
     }
-    ist->sub2video.w = ifilter->width  = w;
-    ist->sub2video.h = ifilter->height = h;
 
-    ifilter->width  = ist->dec_ctx->width  ? ist->dec_ctx->width  : ist->sub2video.w;
-    ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
+    if (!(w && h) && ist->dec_ctx->subtitle_header) {
+        ASSSplitContext *ass_ctx = avpriv_ass_split((char *)ist->dec_ctx->subtitle_header);
+        ASS *ass = (ASS *)ass_ctx;
+        w = ass->script_info.play_res_x;
+        h = ass->script_info.play_res_y;
+        avpriv_ass_split_free(ass_ctx);
+    }
 
-    /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
-       palettes for all rectangles are identical or compatible */
-    ifilter->format = AV_PIX_FMT_RGB32;
+    ist->subtitle_heartbeat.w = w;
+    ist->subtitle_heartbeat.h = h;
+    av_log(ifilter, AV_LOG_INFO, "subtitle input filter: decoding size %dx%d\n", ist->subtitle_heartbeat.w, ist->subtitle_heartbeat.h);
 
-    ist->sub2video.frame = av_frame_alloc();
-    if (!ist->sub2video.frame)
-        return AVERROR(ENOMEM);
-    ist->sub2video.last_pts = INT64_MIN;
-    ist->sub2video.end_pts  = INT64_MIN;
+    ifilter->width = w;
+    ifilter->height = h;
+    ist->dec_ctx->width = w;
+    ist->dec_ctx->height = h;
 
-    /* sub2video structure has been (re-)initialized.
-       Mark it as such so that the system will be
-       initialized with the first received heartbeat. */
-    ist->sub2video.initialize = 1;
+    ist->subtitle_heartbeat.last_pts = INT64_MIN;
+
+    snprintf(name, sizeof(name), "graph %d subtitle input from stream %d:%d", fg->index,
+             ist->file_index, ist->st->index);
+
+
+    av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
+    av_bprintf(&args,
+             "subtitle_type=%d:width=%d:height=%d:time_base=%d/%d:",
+             ifilter->format, ifilter->width, ifilter->height,
+             ist->st->time_base.num, ist->st->time_base.den);
+    if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
+                                            args.str, NULL, fg->graph)) < 0)
+        goto fail;
+
+    par->hw_frames_ctx = ifilter->hw_frames_ctx;
+    par->format = ifilter->format;
+    par->width = ifilter->width;
+    par->height = ifilter->height;
+
+    ret = av_buffersrc_parameters_set(ifilter->filter, par);
+    if (ret < 0)
+        goto fail;
+    av_freep(&par);
+    last_filter = ifilter->filter;
+
+    media_type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
+    if (media_type == AVMEDIA_TYPE_VIDEO) {
+        av_log(NULL, AV_LOG_INFO, "Auto-inserting graphicsub2video filter\n");
+        ret = insert_filter(&last_filter, &pad_idx, "graphicsub2video", NULL);
+        if (ret < 0)
+            return ret;
+    }
+
+    if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
+        return ret;
 
     return 0;
+fail:
+    av_freep(&par);
+
+    return ret;
 }
 
 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
@@ -710,8 +813,15 @@ static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
     char name[255];
     int ret, pad_idx = 0;
     int64_t tsoffset = 0;
-    AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
+    AVBufferSrcParameters *par;
+
+    if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
+        // Automatically insert conversion filter to retain compatibility
+        // with sub2video command lines
+        return configure_input_subtitle_filter(fg, ifilter, in);
+    }
 
+    par = av_buffersrc_parameters_alloc();
     if (!par)
         return AVERROR(ENOMEM);
     memset(par, 0, sizeof(*par));
@@ -726,12 +836,6 @@ static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
     if (!fr.num)
         fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
 
-    if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
-        ret = sub2video_prepare(ist, ifilter);
-        if (ret < 0)
-            goto fail;
-    }
-
     sar = ifilter->sample_aspect_ratio;
     if(!sar.den)
         sar = (AVRational){0,1};
@@ -743,7 +847,7 @@ static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
              tb.num, tb.den, sar.num, sar.den);
     if (fr.num && fr.den)
         av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
-    snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
+    snprintf(name, sizeof(name), "graph %d video input from stream %d:%d", fg->index,
              ist->file_index, ist->st->index);
 
 
@@ -949,6 +1053,7 @@ static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
+    case AVMEDIA_TYPE_SUBTITLE: return configure_input_subtitle_filter(fg, ifilter, in);
     default: av_assert0(0); return 0;
     }
 }
@@ -1116,19 +1221,6 @@ int configure_filtergraph(FilterGraph *fg)
         }
     }
 
-    /* process queued up subtitle packets */
-    for (i = 0; i < fg->nb_inputs; i++) {
-        InputStream *ist = fg->inputs[i]->ist;
-        if (ist->sub2video.sub_queue && ist->sub2video.frame) {
-            while (av_fifo_size(ist->sub2video.sub_queue)) {
-                AVSubtitle tmp;
-                av_fifo_generic_read(ist->sub2video.sub_queue, &tmp, sizeof(tmp), NULL);
-                sub2video_update(ist, INT64_MIN, &tmp);
-                avsubtitle_free(&tmp);
-            }
-        }
-    }
-
     return 0;
 
 fail:
@@ -1151,6 +1243,7 @@ int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
     ifilter->sample_rate         = frame->sample_rate;
     ifilter->channels            = frame->channels;
     ifilter->channel_layout      = frame->channel_layout;
+    ifilter->type                = frame->type;
 
     av_freep(&ifilter->displaymatrix);
     sd = av_frame_get_side_data(frame, AV_FRAME_DATA_DISPLAYMATRIX);
diff --git a/fftools/ffmpeg_hw.c b/fftools/ffmpeg_hw.c
index 14e702bd92..be69d54aaf 100644
--- a/fftools/ffmpeg_hw.c
+++ b/fftools/ffmpeg_hw.c
@@ -449,7 +449,7 @@ int hw_device_setup_for_encode(OutputStream *ost)
     AVBufferRef *frames_ref = NULL;
     int i;
 
-    if (ost->filter) {
+    if (ost->filter && ost->filter->filter) {
         frames_ref = av_buffersink_get_hw_frames_ctx(ost->filter->filter);
         if (frames_ref &&
             ((AVHWFramesContext*)frames_ref->data)->format ==
diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index e55b584fd4..d443a5b8c8 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -2207,8 +2207,9 @@ static void init_output_filter(OutputFilter *ofilter, OptionsContext *o,
     switch (ofilter->type) {
     case AVMEDIA_TYPE_VIDEO: ost = new_video_stream(o, oc, -1); break;
     case AVMEDIA_TYPE_AUDIO: ost = new_audio_stream(o, oc, -1); break;
+    case AVMEDIA_TYPE_SUBTITLE: ost = new_subtitle_stream(o, oc, -1); break;
     default:
-        av_log(NULL, AV_LOG_FATAL, "Only video and audio filters are supported "
+        av_log(NULL, AV_LOG_FATAL, "Only video, audio and subtitle filters are supported "
                "currently.\n");
         exit_program(1);
     }
diff --git a/tests/ref/fate/filter-overlay-dvdsub-2397 b/tests/ref/fate/filter-overlay-dvdsub-2397
index 483e5fa4e0..3bf198d6ad 100644
--- a/tests/ref/fate/filter-overlay-dvdsub-2397
+++ b/tests/ref/fate/filter-overlay-dvdsub-2397
@@ -490,368 +490,367 @@
 1,       3877,       3877,       10,     2013, 0x95a39f9c
 1,       3887,       3887,       10,     2013, 0x4f7ea123
 1,       3897,       3897,       10,     2013, 0x9efb9ba1
-0,        117,        117,        1,   518400, 0xbf8523da
+0,        117,        117,        1,   518400, 0x61e0f688
 1,       3907,       3907,       10,     2013, 0xf395b2cd
 1,       3917,       3917,       10,     2013, 0x261a881e
 1,       3927,       3927,       10,     2013, 0x7f2d9f72
 1,       3937,       3937,       10,     2013, 0x0105b38d
-0,        118,        118,        1,   518400, 0x41890ed6
+0,        118,        118,        1,   518400, 0xa47de755
 1,       3952,       3952,       10,     2013, 0x0e5db67e
 1,       3962,       3962,       10,     2013, 0xfc9baf97
-0,        119,        119,        1,   518400, 0x588534fc
+0,        119,        119,        1,   518400, 0x52d52e73
 1,       3972,       3972,       10,     2013, 0x8e02a1b1
 1,       3982,       3982,       10,     2013, 0x6eecaac8
 1,       3992,       3992,       10,     2013, 0xf5558f0c
 1,       4002,       4002,       10,     2013, 0x512ba99b
-0,        120,        120,        1,   518400, 0x2145ebc1
+0,        120,        120,        1,   518400, 0xc732e546
 1,       4012,       4012,       10,     2013, 0x932b9932
 1,       4022,       4022,       10,     2013, 0xc01ea987
-0,        121,        121,        1,   518400, 0x28bca595
+0,        121,        121,        1,   518400, 0xc36f9f14
 1,       4038,       4038,       10,     2013, 0x10879cf7
 1,       4048,       4048,       10,     2013, 0x90679338
 1,       4058,       4058,       10,     2013, 0x077d8a9e
 1,       4068,       4068,       10,     2013, 0x969fa57c
-0,        122,        122,        1,   518400, 0x77dc951e
+0,        122,        122,        1,   518400, 0x78428e8b
 1,       4078,       4078,       10,     2013, 0xe049ab07
 1,       4088,       4088,       10,     2013, 0xf535b3b3
 1,       4098,       4098,       10,     2013, 0xfe76bd37
-0,        123,        123,        1,   518400, 0xe8924c17
+0,        123,        123,        1,   518400, 0xf0f8458d
 1,       4108,       4108,       10,     2013, 0xde79ad8c
 1,       4123,       4123,       10,     2013, 0xe89b9c47
 1,       4133,       4133,       10,     2013, 0xc570b0f0
-0,        124,        124,        1,   518400, 0xadb4cccc
+0,        124,        124,        1,   518400, 0x7083c653
 1,       4143,       4143,       10,     2013, 0xee709cd9
 1,       4153,       4153,       10,     2013, 0xcfe5afab
 1,       4163,       4163,       10,     2013, 0x98ff8ce4
-0,        125,        125,        1,   518400, 0x1d7b56ac
+0,        125,        125,        1,   518400, 0xa105502c
 1,       4173,       4173,       10,     2013, 0x9d19b44c
 1,       4183,       4183,       10,     2013, 0x4349917a
 1,       4193,       4193,       10,     2013, 0xbf54a59a
-0,        126,        126,        1,   518400, 0xad5739a4
+0,        126,        126,        1,   518400, 0xd411331a
 1,       4208,       4208,       10,     2013, 0xc4a399e0
 1,       4218,       4218,       10,     2013, 0x1bf58ff0
 1,       4228,       4228,       10,     2013, 0x3518ac56
-0,        127,        127,        1,   518400, 0x2733d35a
+0,        127,        127,        1,   518400, 0x83b0ccdb
 1,       4238,       4238,       10,     2013, 0xcd38c1de
 1,       4248,       4248,       10,     2013, 0xbe7d9c4d
 1,       4258,       4258,       10,     2013, 0xe113a306
 1,       4268,       4268,       10,     2013, 0x083197ea
-0,        128,        128,        1,   518400, 0x78e76da2
+0,        128,        128,        1,   518400, 0xa9be671a
 1,       4278,       4278,       10,     2013, 0x1929b1eb
 1,       4294,       4294,       10,     2013, 0x5d6ea5af
 1,       4304,       4304,       10,     2013, 0x05519d53
-0,        129,        129,        1,   518400, 0x6c076013
+0,        129,        129,        1,   518400, 0xaeb75983
 1,       4314,       4314,       10,     2013, 0x5773b380
 1,       4324,       4324,       10,     2013, 0xaa70a8f5
 1,       4334,       4334,       10,     2013, 0x990db0ec
-0,        130,        130,        1,   518400, 0x7854f2b1
+0,        130,        130,        1,   518400, 0x81f8ec13
 1,       4344,       4344,       10,     2013, 0x91d3a623
 1,       4354,       4354,       10,     2013, 0xc91f9824
 1,       4364,       4364,       10,     2013, 0x1d058abf
-0,        131,        131,        1,   518400, 0xd2ae1ecd
+0,        131,        131,        1,   518400, 0x8aaa1839
 1,       4379,       4379,       10,     2013, 0x8de1b8d5
 1,       4389,       4389,       10,     2013, 0x7872b06b
 1,       4399,       4399,       10,     2013, 0xa084c203
-0,        132,        132,        1,   518400, 0xf5eab38d
+0,        132,        132,        1,   518400, 0xc98bacf5
 1,       4409,       4409,       10,     2013, 0xff90ae8d
 1,       4419,       4419,       10,     2013, 0x61dead8e
 1,       4429,       4429,       10,     2013, 0xee76b284
-0,        133,        133,        1,   518400, 0x994d3e9c
+0,        133,        133,        1,   518400, 0x31083804
 1,       4439,       4439,       10,     2013, 0xe888af7f
 1,       4449,       4449,       10,     2013, 0x5d57b115
 1,       4464,       4464,       10,     2013, 0xcdbfb1d0
-0,        134,        134,        1,   518400, 0x95ab705a
+0,        134,        134,        1,   518400, 0x540a69dc
 1,       4474,       4474,       10,     2013, 0x2e28a952
 1,       4484,       4484,       10,     2013, 0x4795a994
 1,       4494,       4494,       10,     2013, 0x7e7ea304
 1,       4504,       4504,       10,     2013, 0x9502c1e1
-0,        135,        135,        1,   518400, 0x3c83c5ce
+0,        135,        135,        1,   518400, 0x80d3bf46
 1,       4514,       4514,       10,     2013, 0xf7c78ab2
 1,       4524,       4524,       10,     2013, 0x24049816
 1,       4534,       4534,       10,     2013, 0x52089dcf
-0,        136,        136,        1,   518400, 0xfa22c508
+0,        136,        136,        1,   518400, 0x2967be7f
 1,       4550,       4550,       10,     2013, 0x2150a0b1
 1,       4560,       4560,       10,     2013, 0x3c2e9b93
 1,       4570,       4570,       10,     2013, 0x491f932b
-0,        137,        137,        1,   518400, 0xddda1712
+0,        137,        137,        1,   518400, 0x5a3b1092
 1,       4580,       4580,       10,     2013, 0x31359cf8
 1,       4590,       4590,       10,     2013, 0x1b00ac3f
 1,       4600,       4600,       10,     2013, 0x8d7ab3cb
-0,        138,        138,        1,   518400, 0x985a3b93
+0,        138,        138,        1,   518400, 0x8741350b
 1,       4610,       4610,       10,     2013, 0xb2c2a4de
 1,       4620,       4620,       10,     2013, 0x80a4abf2
 1,       4635,       4635,       10,     2013, 0x0701a4ee
-0,        139,        139,        1,   518400, 0xea63c5e7
+0,        139,        139,        1,   518400, 0xd5a9bf60
 1,       4645,       4645,       10,     2013, 0xdc1ba5bc
 1,       4655,       4655,       10,     2013, 0x6083a8a4
 1,       4665,       4665,       10,     2013, 0x6226ad45
-0,        140,        140,        1,   518400, 0xef64983d
+0,        140,        140,        1,   518400, 0xc05f91ba
 1,       4675,       4675,       10,     2013, 0x2732a205
 1,       4685,       4685,       10,     2013, 0x0f62a0d3
 1,       4695,       4695,       10,     2013, 0xc1799249
-0,        141,        141,        1,   518400, 0x747bb193
+0,        141,        141,        1,   518400, 0x3fdaab0b
 1,       4705,       4705,       10,     2013, 0xbccfa9c8
 1,       4720,       4720,       10,     2013, 0xded096e7
 1,       4730,       4730,       10,     2013, 0x7f0daf43
-0,        142,        142,        1,   518400, 0xb8748862
+0,        142,        142,        1,   518400, 0xab7281d9
 1,       4740,       4740,       10,     2013, 0xc47ea682
 1,       4750,       4750,       10,     2013, 0x5a72b07a
 1,       4760,       4760,       10,     2013, 0x386faa8c
 1,       4770,       4770,       10,     2013, 0xf9919a91
-0,        143,        143,        1,   518400, 0xaab55a5f
+0,        143,        143,        1,   518400, 0xc80053d6
 1,       4780,       4780,       10,     2013, 0x4908897e
 1,       4790,       4790,       10,     2013, 0x4882b594
-0,        144,        144,        1,   518400, 0x7b468add
+0,        144,        144,        1,   518400, 0x6526845c
 1,       4806,       4806,       10,     2013, 0x113e98d1
 1,       4816,       4816,       10,     2013, 0x5098b30d
 1,       4826,       4826,       10,     2013, 0x0ef7b857
 1,       4836,       4836,       10,     2013, 0x216ea176
-0,        145,        145,        1,   518400, 0xf2078707
+0,        145,        145,        1,   518400, 0x1b788089
 1,       4846,       4846,       10,     2013, 0xf906944a
 1,       4856,       4856,       10,     2013, 0xee9b92fb
 1,       4866,       4866,       10,     2013, 0xd6029209
-0,        146,        146,        1,   518400, 0x6a2d931e
+0,        146,        146,        1,   518400, 0xfa8e8ca9
 1,       4876,       4876,       10,     2013, 0x2256a12e
 1,       4891,       4891,       10,     2013, 0x89de8e4a
 1,       4901,       4901,       10,     2013, 0x0bf0a584
-0,        147,        147,        1,   518400, 0xbbe3c417
+0,        147,        147,        1,   518400, 0xb278bda1
 1,       4911,       4911,       10,     2013, 0x6a5ebd58
 1,       4921,       4921,       10,     2013, 0x3edd9aa4
 1,       4931,       4931,       10,     2013, 0xbd66ac26
-0,        148,        148,        1,   518400, 0x6294e449
+0,        148,        148,        1,   518400, 0xb0c3ddca
 1,       4941,       4941,       10,     2013, 0x313896ea
 1,       4951,       4951,       10,     2013, 0x6b83a6a0
 1,       4961,       4961,       10,     2013, 0x9aafb109
-0,        149,        149,        1,   518400, 0xa05721e7
+0,        149,        149,        1,   518400, 0x10351b53
 1,       4976,       4976,       10,     2013, 0x5192a85a
 1,       4986,       4986,       10,     2013, 0x1f919f79
 1,       4996,       4996,       10,     2013, 0xc0799c40
-0,        150,        150,        1,   518400, 0x37749183
+0,        150,        150,        1,   518400, 0xc1408aee
 1,       5006,       5006,       10,     2013, 0x2988bcd8
 1,       5016,       5016,       10,     2013, 0x1482913a
 1,       5026,       5026,       10,     2013, 0x74da9a94
 1,       5036,       5036,       10,     2013, 0x763eb709
-0,        151,        151,        1,   518400, 0xf9d9dca0
+0,        151,        151,        1,   518400, 0xf016d615
 1,       5046,       5046,       10,     2013, 0x1285b405
 1,       5062,       5062,       10,     2013, 0xb6ab9dfc
-0,        152,        152,        1,   518400, 0x5f8ccf08
+0,        152,        152,        1,   518400, 0xa768c892
 1,       5072,       5072,       10,     2013, 0xe4c8bf19
 1,       5082,       5082,       10,     2013, 0xabbbade8
 1,       5092,       5092,       10,     2013, 0xf8b69d89
 1,       5102,       5102,       10,     2013, 0xce04a866
-0,        153,        153,        1,   518400, 0x7303f77b
+0,        153,        153,        1,   518400, 0x11c3f11e
 1,       5112,       5112,       10,     2013, 0x07528abf
 1,       5122,       5122,       10,     2013, 0x74fb98bf
 1,       5132,       5132,       10,     2013, 0x579fb1c9
-0,        154,        154,        1,   518400, 0x22b0513f
+0,        154,        154,        1,   518400, 0xcd9a4ac4
 1,       5147,       5147,       10,     2013, 0x7ddea2ed
 1,       5157,       5157,       10,     2013, 0x296caa2c
 1,       5167,       5167,       10,     2013, 0x346d9c4f
-0,        155,        155,        1,   518400, 0x330485d2
+0,        155,        155,        1,   518400, 0x4ade7f5e
 1,       5177,       5177,       10,     2013, 0x3e1fba15
 1,       5187,       5187,       10,     2013, 0x48a2908f
 1,       5197,       5197,       10,     2013, 0xc1938d09
-0,        156,        156,        1,   518400, 0x7f83daea
+0,        156,        156,        1,   518400, 0x655dd46b
 1,       5207,       5207,       10,     2013, 0x0e96a060
 1,       5217,       5217,       10,     2013, 0x7b6a9e06
 1,       5232,       5232,       10,     2013, 0x5b779d28
-0,        157,        157,        1,   518400, 0xee19f2df
+0,        157,        157,        1,   518400, 0x5ab5ec61
 1,       5242,       5242,       10,     2013, 0xf600aca1
 1,       5252,       5252,       10,     2013, 0x3a6c9e68
 1,       5262,       5262,       10,     2013, 0x0c8dc1b0
-0,        158,        158,        1,   518400, 0xb71b1c77
+0,        158,        158,        1,   518400, 0x45dc15e6
 1,       5272,       5272,       10,     2013, 0x26beb245
 1,       5282,       5282,       10,     2013, 0x2bc09557
 1,       5292,       5292,       10,     2013, 0x27fc8845
 1,       5302,       5302,       10,     2013, 0x1025aa47
-0,        159,        159,        1,   518400, 0xbffc1856
+0,        159,        159,        1,   518400, 0x201911d3
 1,       5318,       5318,       10,     2013, 0xc2e69baa
 1,       5328,       5328,       10,     2013, 0xdb249b92
 1,       5338,       5338,       10,     2013, 0x6ccda29e
-0,        160,        160,        1,   518400, 0xabc125aa
+0,        160,        160,        1,   518400, 0x0fbc1f46
 1,       5348,       5348,       10,     2013, 0xeaf6a1cf
 1,       5358,       5358,       10,     2013, 0x509ba397
 1,       5368,       5368,       10,     2013, 0xfaf8a2df
-0,        161,        161,        1,   518400, 0x5ee467f8
+0,        161,        161,        1,   518400, 0x7e316179
 1,       5378,       5378,       10,     2013, 0x41388f28
 1,       5388,       5388,       10,     2013, 0xfe5eab39
 1,       5403,       5403,       10,     2013, 0xd5ffa066
-0,        162,        162,        1,   518400, 0x6c2cf168
+0,        162,        162,        1,   518400, 0x73bbeaed
 1,       5413,       5413,       10,     2013, 0x6813a30a
 1,       5423,       5423,       10,     2013, 0x9be89718
 1,       5433,       5433,       10,     2013, 0xaec3a27b
-0,        163,        163,        1,   518400, 0x63996b26
+0,        163,        163,        1,   518400, 0x3a7c648a
 1,       5446,       5446,       10,     2013, 0x579a983e
 1,       5456,       5456,       10,     2013, 0x98cea21f
 1,       5466,       5466,       10,     2013, 0xca77a58a
-0,        164,        164,        1,   518400, 0xb34d789a
+0,        164,        164,        1,   518400, 0x9f707209
 1,       5476,       5476,       10,     2013, 0xcbc3b1ee
 1,       5486,       5486,       10,     2013, 0xf3bb8f07
 1,       5496,       5496,       10,     2013, 0x6aeebd92
-0,        165,        165,        1,   518400, 0xf49c030f
+0,        165,        165,        1,   518400, 0x9f25fc5c
 1,       5506,       5506,       10,     2013, 0xe955a449
 1,       5516,       5516,       10,     2013, 0x9436aa5b
 1,       5531,       5531,       10,     2013, 0x4f0a8f9f
-0,        166,        166,        1,   518400, 0x092dc41a
+0,        166,        166,        1,   518400, 0x2ed8bd75
 1,       5541,       5541,       10,     2013, 0x3551b22d
 1,       5551,       5551,       10,     2013, 0x0959a3d4
 1,       5561,       5561,       10,     2013, 0x2ed5a11b
 1,       5571,       5571,       10,     2013, 0x8f52a5c3
-0,        167,        167,        1,   518400, 0x4134c577
+0,        167,        167,        1,   518400, 0xb493becb
 1,       5581,       5581,       10,     2013, 0x6552978d
 1,       5591,       5591,       10,     2013, 0x7dcca0c1
 1,       5601,       5601,       10,     2013, 0xbcd4a3c9
-0,        168,        168,        1,   518400, 0x261de1ed
+0,        168,        168,        1,   518400, 0x7df6db57
 1,       5616,       5616,       10,     2013, 0xfe41a8d8
 1,       5626,       5626,       10,     2013, 0xc85aae14
 1,       5636,       5636,       10,     2013, 0x1185b346
-0,        169,        169,        1,   518400, 0xcbc8566a
+0,        169,        169,        1,   518400, 0x1cb94fca
 1,       5646,       5646,       10,     2013, 0xf7429a0d
 1,       5656,       5656,       10,     2013, 0x48c2a160
 1,       5666,       5666,       10,     2013, 0x9d85a85d
-0,        170,        170,        1,   518400, 0x407a5c76
+0,        170,        170,        1,   518400, 0x70db55d8
 1,       5676,       5676,       10,     2013, 0xbbe89fe9
 1,       5686,       5686,       10,     2013, 0xea429fe2
 1,       5702,       5702,       10,     2013, 0x221ca1d4
-0,        171,        171,        1,   518400, 0x1ed73bb2
+0,        171,        171,        1,   518400, 0xc1d9351b
 1,       5712,       5712,       10,     2013, 0x394b925b
 1,       5722,       5722,       10,     2013, 0x556dc26f
 1,       5732,       5732,       10,     2013, 0xce21a5e1
-0,        172,        172,        1,   518400, 0x8467ddb5
+0,        172,        172,        1,   518400, 0xa4b0d717
 1,       5742,       5742,       10,     2013, 0xbc87c0a8
 1,       5752,       5752,       10,     2013, 0xbac4ac07
 1,       5762,       5762,       10,     2013, 0xdeefa4aa
 1,       5772,       5772,       10,     2013, 0x1f15b362
-0,        173,        173,        1,   518400, 0x0523dc73
+0,        173,        173,        1,   518400, 0x3730d5e9
 1,       5787,       5787,       10,     2013, 0x6406b7b2
 1,       5797,       5797,       10,     2013, 0x8030a03d
-0,        174,        174,        1,   518400, 0x81f5e895
+0,        174,        174,        1,   518400, 0x9673e1ec
 1,       5807,       5807,       10,     2013, 0x0373a5b1
 1,       5817,       5817,       10,     2013, 0x34ef93da
 1,       5827,       5827,       10,     2013, 0x94c198fe
 1,       5837,       5837,       10,     2013, 0xfefcabad
-0,        175,        175,        1,   518400, 0xfc74608d
+0,        175,        175,        1,   518400, 0x877959d5
 1,       5847,       5847,       10,     2013, 0x8755b3ec
 1,       5857,       5857,       10,     2013, 0xe436a6fd
 1,       5872,       5872,       10,     2013, 0x9cf5a11e
-0,        176,        176,        1,   518400, 0xc4e0dae0
+0,        176,        176,        1,   518400, 0x04f3d421
 1,       5882,       5882,       10,     2013, 0x03b8a98c
 1,       5892,       5892,       10,     2013, 0x6216a138
 1,       5902,       5902,       10,     2013, 0xd87b9f12
-0,        177,        177,        1,   518400, 0x98367f5b
+0,        177,        177,        1,   518400, 0x4f3078bc
 1,       5912,       5912,       10,     2013, 0x4ce99653
 1,       5922,       5922,       10,     2013, 0x6c2ea9e2
 1,       5932,       5932,       10,     2013, 0x918cae4c
-0,        178,        178,        1,   518400, 0x0f1a869d
+0,        178,        178,        1,   518400, 0x8a127ff8
 1,       5942,       5942,       10,     2013, 0xd19fa5f2
 1,       5958,       5958,       10,     2013, 0x0bdda7c6
 1,       5968,       5968,       10,     2013, 0x0f9ab0ca
-0,        179,        179,        1,   518400, 0x45b6ccf2
+0,        179,        179,        1,   518400, 0x5864c64f
 1,       5978,       5978,       10,     2013, 0x410a92b1
 1,       5988,       5988,       10,     2013, 0xcfbe9d1c
 1,       5998,       5998,       10,     2013, 0x59ed9d15
-0,        180,        180,        1,   518400, 0x5f9ccb77
+0,        180,        180,        1,   518400, 0xdaccc4c0
 1,       6008,       6008,       10,     2013, 0x4e129e27
 1,       6018,       6018,       10,     2013, 0x7bb9ac0a
 1,       6028,       6028,       10,     2013, 0x826ca82b
-0,        181,        181,        1,   518400, 0x5f15ea31
+0,        181,        181,        1,   518400, 0xd999e376
 1,       6043,       6043,       10,     2013, 0x9ad5a74b
 1,       6053,       6053,       10,     2013, 0x6c5f969a
 1,       6063,       6063,       10,     2013, 0x8479a0e5
-0,        182,        182,        1,   518400, 0x86369f27
+0,        182,        182,        1,   518400, 0x8af39876
 1,       6073,       6073,       10,     2013, 0x165298ef
 1,       6083,       6083,       10,     2013, 0xdcadb4a1
 1,       6093,       6093,       10,     2013, 0xa90e987c
 1,       6103,       6103,       10,     2013, 0x1ac5b510
-0,        183,        183,        1,   518400, 0x2e27f9fa
+0,        183,        183,        1,   518400, 0x5e72f33d
 1,       6113,       6113,       10,     2013, 0x66728d85
 1,       6128,       6128,       10,     2013, 0xe4859fc5
 1,       6138,       6138,       10,     2013, 0x9901786e
-0,        184,        184,        1,   518400, 0xc029a44d
+0,        184,        184,        1,   518400, 0x14af9d92
 1,       6148,       6148,       10,     2013, 0x6aebb406
 1,       6158,       6158,       10,     2013, 0x7d13a2cc
 1,       6168,       6168,       10,     2013, 0x99b7a8cc
-0,        185,        185,        1,   518400, 0xebee33b0
+0,        185,        185,        1,   518400, 0x50b82d10
 1,       6178,       6178,       10,     2013, 0x80b8a624
 1,       6188,       6188,       10,     2013, 0xbb6aa271
 1,       6198,       6198,       10,     2013, 0x17af9e4a
-0,        186,        186,        1,   518400, 0x19e5494f
+0,        186,        186,        1,   518400, 0xc068429c
 1,       6214,       6214,       10,     2013, 0xfaf0a8f1
 1,       6224,       6224,       10,     2013, 0xd6849b93
 1,       6234,       6234,       10,     2013, 0xe9829669
-0,        187,        187,        1,   518400, 0xf697bd7c
+0,        187,        187,        1,   518400, 0x8934b6d1
 1,       6244,       6244,       10,     2013, 0x7ec98944
 1,       6254,       6254,       10,     2013, 0x2b2099a4
 1,       6264,       6264,       10,     2013, 0x1033a82f
-0,        188,        188,        1,   518400, 0x82569002
+0,        188,        188,        1,   518400, 0x11d08947
 1,       6274,       6274,       10,     2013, 0x5ec88990
 1,       6284,       6284,       10,     2013, 0xd2a19b3d
 1,       6299,       6299,       10,     2013, 0xa377b268
-0,        189,        189,        1,   518400, 0xfcb6d707
+0,        189,        189,        1,   518400, 0x8a27d041
 1,       6309,       6309,       10,     2013, 0xfa859901
 1,       6319,       6319,       10,     2013, 0x1713955a
 1,       6329,       6329,       10,     2013, 0x70aab0da
 1,       6339,       6339,       10,     2013, 0xcdaea422
-0,        190,        190,        1,   518400, 0x82a9662b
+0,        190,        190,        1,   518400, 0xab265f7d
 1,       6349,       6349,       10,     2013, 0x65c3bf80
 1,       6359,       6359,       10,     2013, 0x1d75a55f
 1,       6369,       6369,       10,     2013, 0xa5bea4de
-0,        191,        191,        1,   518400, 0x212e16ee
+0,        191,        191,        1,   518400, 0xff491040
 1,       6384,       6384,       10,     2013, 0x184db71c
 1,       6394,       6394,       10,     2013, 0x99858ec8
 1,       6404,       6404,       10,     2013, 0xb8f2aee5
-0,        192,        192,        1,   518400, 0x2ca34dca
+0,        192,        192,        1,   518400, 0x822b4704
 1,       6414,       6414,       10,     2013, 0x4435b2ef
 1,       6424,       6424,       10,     2013, 0x8acfa6c7
 1,       6434,       6434,       10,     2013, 0x42b4c01f
-0,        193,        193,        1,   518400, 0xe9ebe0a5
+0,        193,        193,        1,   518400, 0x4523d9f4
 1,       6444,       6444,       10,     2013, 0x6e308c13
 1,       6454,       6454,       10,     2013, 0x8227a0f6
 1,       6470,       6470,       10,     2013, 0x6f12a7a2
-0,        194,        194,        1,   518400, 0x4e6b6917
+0,        194,        194,        1,   518400, 0xfc3c626e
 1,       6480,       6480,       10,     2013, 0x785392be
 1,       6490,       6490,       10,     2013, 0x81849c2b
 1,       6500,       6500,       10,     2013, 0x5cf2af65
-0,        195,        195,        1,   518400, 0x7dcf20ab
+0,        195,        195,        1,   518400, 0x237319e5
 1,       6510,       6510,       10,     2013, 0x0c6ca6b4
 1,       6520,       6520,       10,     2013, 0x412fab9f
 1,       6530,       6530,       10,     2013, 0x08e792b4
-0,        196,        196,        1,   518400, 0xf30fac97
+0,        196,        196,        1,   518400, 0x892ca5d8
 1,       6540,       6540,       10,     2013, 0x407aace3
 1,       6555,       6555,       10,     2013, 0xd26bac16
 1,       6565,       6565,       10,     2013, 0xac8bb295
-0,        197,        197,        1,   518400, 0xcb9fc692
+0,        197,        197,        1,   518400, 0xc4c0bfc7
 1,       6575,       6575,       10,     2013, 0xddd1949c
 1,       6585,       6585,       10,     2013, 0x6b26b868
 1,       6595,       6595,       10,     2013, 0x5eaba587
 1,       6605,       6605,       10,     2013, 0xef0793b9
-0,        198,        198,        1,   518400, 0x5d05601e
+0,        198,        198,        1,   518400, 0x57c85956
 1,       6615,       6615,       10,     2013, 0xdef19bd6
 1,       6625,       6625,       10,     2013, 0xca98a635
-0,        199,        199,        1,   518400, 0x456c1417
+0,        199,        199,        1,   518400, 0xd6300d46
 1,       6640,       6640,       10,     2013, 0x06269a5a
 1,       6650,       6650,       10,     2013, 0x32cb9952
 1,       6660,       6660,       10,     2013, 0xf01fa95a
 1,       6670,       6670,       10,     2013, 0xefab9e55
-0,        200,        200,        1,   518400, 0x9a0fd1ad
+0,        200,        200,        1,   518400, 0xd3dacaec
 1,       6680,       6680,       10,     2013, 0x55a3b63a
 1,       6690,       6690,       10,     2013, 0xcd36a553
 1,       6700,       6700,       10,     2013, 0x2ec19877
-0,        201,        201,        1,   518400, 0x55db9716
+0,        201,        201,        1,   518400, 0x65429052
 1,       6710,       6710,       10,     2013, 0xc18b924c
 1,       6726,       6726,       10,     2013, 0xf132b04c
 1,       6736,       6736,       10,     2013, 0x7975a44d
-0,        202,        202,        1,   518400, 0x1f0d40d6
+0,        202,        202,        1,   518400, 0xec803a15
 1,       6746,       6746,       10,     2013, 0x2aaf94cb
 1,       6756,       6756,       10,     2013, 0x58cfa60f
 1,       6766,       6766,       10,     2013, 0x9757a658
-0,        203,        203,        1,   518400, 0x73695c82
+0,        203,        203,        1,   518400, 0x7a9a55c9
 1,       6776,       6776,       10,     2013, 0x67ebc0d5
 1,       6786,       6786,       10,     2013, 0x3c50a70e
 1,       6796,       6796,       10,     2013, 0x9c5799c6
-0,        204,        204,        1,   518400, 0xb0f10812
+0,        204,        204,        1,   518400, 0xcac30160
 1,       6811,       6811,       10,     2013, 0x018d85b2
 1,       6821,       6821,       10,     2013, 0x5367a956
-0,        205,        205,        1,   518400, 0xdec18505
-0,        208,        208,        1,   518400, 0xb147b947
-0,        240,        240,        1,   518400, 0x9d2e3977
+0,        205,        205,        1,   518400, 0x7e187e4f
+0,        208,        208,        1,   518400, 0x0be0b2a2
diff --git a/tests/ref/fate/sub-dvb b/tests/ref/fate/sub-dvb
index cbd1801d64..8f33c75d70 100644
--- a/tests/ref/fate/sub-dvb
+++ b/tests/ref/fate/sub-dvb
@@ -1,75 +1,93 @@
 #tb 0: 1/1000000
 #media_type 0: subtitle
 #codec_id 0: dvb_subtitle
-0,   15600000,   15600000,   159000,     1168, 0xd0f89d82
-0,   15759000,   15759000,   159000,       14, 0x064900eb
-0,   15760000,   15760000,   239000,     1544, 0xe60f1751
-0,   15999000,   15999000,   239000,       14, 0x0729010b
-0,   16000000,   16000000,   339000,     1658, 0xbe343093
-0,   16339000,   16339000,   339000,       14, 0x0809012b
-0,   16340000,   16340000,   599000,     2343, 0xc68f07ef
-0,   16939000,   16939000,   599000,       14, 0x08e9014b
-0,   16940000,   16940000,   459000,     2568, 0x0ee657b1
-0,   17399000,   17399000,   459000,       14, 0x09c9016b
-0,   17400000,   17400000,   359000,     3422, 0xba5b63ce
-0,   17759000,   17759000,   359000,       14, 0x0aa9018b
-0,   17760000,   17760000,   219000,     5078, 0x95b19902
-0,   17979000,   17979000,   219000,       14, 0x0b8901ab
-0,   17980000,   17980000,   959000,     5808, 0xc9717b89
-0,   18939000,   18939000,   959000,       14, 0x0c6901cb
-0,   18940000,   18940000,   219000,     6015, 0x0becbfac
-0,   19159000,   19159000,   219000,       14, 0x064900eb
-0,   19160000,   19160000,   259000,     6519, 0xfcd24d26
-0,   19419000,   19419000,   259000,       14, 0x0729010b
-0,   19420000,   19420000,    99000,     7061, 0xf0320408
-0,   19519000,   19519000,    99000,       14, 0x0809012b
-0,   19520000,   19520000,   219000,     4773, 0x66c93074
-0,   19739000,   19739000,   219000,       14, 0x08e9014b
-0,   19740000,   19740000,   219000,     5546, 0x06052c81
-0,   19959000,   19959000,   219000,       14, 0x09c9016b
-0,   19960000,   19960000,   239000,     5754, 0x904f7325
-0,   20199000,   20199000,   239000,       14, 0x0aa9018b
-0,   20200000,   20200000,   139000,     6099, 0xe30cde07
-0,   20339000,   20339000,   139000,       14, 0x0b8901ab
-0,   20340000,   20340000,   799000,     6839, 0x770fcb6c
-0,   21139000,   21139000,   799000,       14, 0x0c6901cb
-0,   21140000,   21140000,   239000,     4744, 0xa91e1b41
-0,   21379000,   21379000,   239000,       14, 0x064900eb
-0,   21380000,   21380000,   339000,     5824, 0xcf6d782b
-0,   21719000,   21719000,   339000,       14, 0x0729010b
-0,   21720000,   21720000,  1439000,     6212, 0xabf8f7cf
-0,   23159000,   23159000,  1439000,       14, 0x0809012b
-0,   23160000,   23160000,  1319000,     7082, 0xd7ca10f2
-0,   24479000,   24479000,  1319000,       14, 0x08e9014b
-0,   24480000,   24480000,   219000,     5345, 0x12b2cae0
-0,   24699000,   24699000,   219000,       14, 0x09c9016b
-0,   24700000,   24700000,   219000,     5765, 0xc7d46192
-0,   24919000,   24919000,   219000,       14, 0x0aa9018b
-0,   24920000,   24920000,   599000,     6557, 0xcb995d30
-0,   25519000,   25519000,   599000,       14, 0x0b8901ab
-0,   25520000,   25520000,   219000,     7091, 0xe6ea0559
-0,   25739000,   25739000,   219000,       14, 0x0c6901cb
-0,   25740000,   25740000,   239000,     7305, 0xb66c404e
-0,   25979000,   25979000,   239000,       14, 0x064900eb
-0,   25980000,   25980000,   359000,     7590, 0x0cc2a481
-0,   26339000,   26339000,   359000,       14, 0x0729010b
-0,   26340000,   26340000,   219000,     4629, 0xe18cfea8
-0,   26559000,   26559000,   219000,       14, 0x0809012b
-0,   26560000,   26560000,   719000,     4785, 0x82043fc0
-0,   27279000,   27279000,   719000,       14, 0x08e9014b
-0,   27280000,   27280000,   459000,     6061, 0xbde7d245
-0,   27739000,   27739000,   459000,       14, 0x09c9016b
-0,   27740000,   27740000,   239000,     6301, 0x92d01a51
-0,   27979000,   27979000,   239000,       14, 0x0aa9018b
-0,   27980000,   27980000,    99000,     6736, 0xbd25a134
-0,   28079000,   28079000,    99000,       14, 0x0b8901ab
-0,   28080000,   28080000,   219000,     7214, 0x7ef93c13
-0,   28299000,   28299000,   219000,       14, 0x0c6901cb
-0,   28300000,   28300000,   239000,     7366, 0x5bed7fcd
-0,   28539000,   28539000,   239000,       14, 0x064900eb
-0,   28540000,   28540000,   599000,     4564, 0x7f4c014b
-0,   29139000,   29139000,   599000,       14, 0x0729010b
-0,   29140000,   29140000,   219000,     4637, 0x682626b7
-0,   29359000,   29359000,   219000,       14, 0x0809012b
-0,   29360000,   29360000,  1679000,     5358, 0x29e30c48
-0,   31039000,   31039000,  1679000,       14, 0x08e9014b
+0,          0,          0,   279000,       14, 0x05d900db
+0,     279000,     279000,   279000,       14, 0x064900eb
+0,     280000,     280000,  4999000,       14, 0x06b900fb
+0,    5279000,    5279000,  4999000,       14, 0x0729010b
+0,    5280000,    5280000,  5019000,       14, 0x0799011b
+0,   10299000,   10299000,  5019000,       14, 0x0809012b
+0,   10300000,   10300000,  3599000,       14, 0x0879013b
+0,   13899000,   13899000,  3599000,       14, 0x08e9014b
+0,   13900000,   13900000,   219000,       14, 0x0959015b
+0,   14119000,   14119000,   219000,       14, 0x09c9016b
+0,   14120000,   14120000,  1439000,       14, 0x0a39017b
+0,   15559000,   15559000,  1439000,       14, 0x0aa9018b
+0,   15560000,   15560000,    39000,       14, 0x0b19019b
+0,   15599000,   15599000,    39000,       14, 0x0b8901ab
+0,   15600000,   15600000,   159000,     1168, 0xd69da022
+0,   15759000,   15759000,   159000,       14, 0x0c6901cb
+0,   15760000,   15760000,   239000,     1544, 0xc5f116f1
+0,   15999000,   15999000,   239000,       14, 0x064900eb
+0,   16000000,   16000000,   339000,     1658, 0x73563033
+0,   16339000,   16339000,   339000,       14, 0x0729010b
+0,   16340000,   16340000,   599000,     2343, 0x7ac2078f
+0,   16939000,   16939000,   599000,       14, 0x0809012b
+0,   16940000,   16940000,   459000,     2568, 0x6eaa5751
+0,   17399000,   17399000,   459000,       14, 0x08e9014b
+0,   17400000,   17400000,   359000,     3422, 0xd9d0636e
+0,   17759000,   17759000,   359000,       14, 0x09c9016b
+0,   17760000,   17760000,   219000,     5078, 0x722c9862
+0,   17979000,   17979000,   219000,       14, 0x0aa9018b
+0,   17980000,   17980000,   959000,     5808, 0x38dd7ae9
+0,   18939000,   18939000,   959000,       14, 0x0b8901ab
+0,   18940000,   18940000,   219000,     6015, 0xd4d2c40c
+0,   19159000,   19159000,   219000,       14, 0x0c6901cb
+0,   19160000,   19160000,   259000,     6519, 0x08af4c86
+0,   19419000,   19419000,   259000,       14, 0x064900eb
+0,   19420000,   19420000,    99000,     7061, 0xecf10368
+0,   19519000,   19519000,    99000,       14, 0x0729010b
+0,   19520000,   19520000,   219000,     4773, 0xbee42fd4
+0,   19739000,   19739000,   219000,       14, 0x0809012b
+0,   19740000,   19740000,   219000,     5546, 0xdb822be1
+0,   19959000,   19959000,   219000,       14, 0x08e9014b
+0,   19960000,   19960000,   239000,     5754, 0xfdcc7285
+0,   20199000,   20199000,   239000,       14, 0x09c9016b
+0,   20200000,   20200000,   139000,     6099, 0xa409dd67
+0,   20339000,   20339000,   139000,       14, 0x0aa9018b
+0,   20340000,   20340000,   799000,     6839, 0xc5eecacc
+0,   21139000,   21139000,   799000,       14, 0x0b8901ab
+0,   21140000,   21140000,   239000,     4744, 0x4e451fa1
+0,   21379000,   21379000,   239000,       14, 0x0c6901cb
+0,   21380000,   21380000,   339000,     5824, 0x5299778b
+0,   21719000,   21719000,   339000,       14, 0x064900eb
+0,   21720000,   21720000,  1439000,     6212, 0x6d15f72f
+0,   23159000,   23159000,  1439000,       14, 0x0729010b
+0,   23160000,   23160000,  1319000,     7082, 0xe5c91052
+0,   24479000,   24479000,  1319000,       14, 0x0809012b
+0,   24480000,   24480000,   219000,     5345, 0x2e5eca40
+0,   24699000,   24699000,   219000,       14, 0x08e9014b
+0,   24700000,   24700000,   219000,     5765, 0x118060f2
+0,   24919000,   24919000,   219000,       14, 0x09c9016b
+0,   24920000,   24920000,   599000,     6557, 0x89275c90
+0,   25519000,   25519000,   599000,       14, 0x0aa9018b
+0,   25520000,   25520000,   219000,     7091, 0x996904b9
+0,   25739000,   25739000,   219000,       14, 0x0b8901ab
+0,   25740000,   25740000,   239000,     7305, 0xc23e44ae
+0,   25979000,   25979000,   239000,       14, 0x0c6901cb
+0,   25980000,   25980000,   359000,     7590, 0xc5a3a3e1
+0,   26339000,   26339000,   359000,       14, 0x064900eb
+0,   26340000,   26340000,   219000,     4629, 0x7ad6fe08
+0,   26559000,   26559000,   219000,       14, 0x0729010b
+0,   26560000,   26560000,   719000,     4785, 0xcd3f3f20
+0,   27279000,   27279000,   719000,       14, 0x0809012b
+0,   27280000,   27280000,   459000,     6061, 0x8b04d1a5
+0,   27739000,   27739000,   459000,       14, 0x08e9014b
+0,   27740000,   27740000,   239000,     6301, 0xe7de19b1
+0,   27979000,   27979000,   239000,       14, 0x09c9016b
+0,   27980000,   27980000,    99000,     6736, 0x38b3a094
+0,   28079000,   28079000,    99000,       14, 0x0aa9018b
+0,   28080000,   28080000,   219000,     7214, 0x0b783b73
+0,   28299000,   28299000,   219000,       14, 0x0b8901ab
+0,   28300000,   28300000,   239000,     7366, 0x98bf842d
+0,   28539000,   28539000,   239000,       14, 0x0c6901cb
+0,   28540000,   28540000,   599000,     4564, 0x3d9600ab
+0,   29139000,   29139000,   599000,       14, 0x064900eb
+0,   29140000,   29140000,   219000,     4637, 0x01f02617
+0,   29359000,   29359000,   219000,       14, 0x0729010b
+0,   29360000,   29360000,  1679000,     5358, 0x5b0f0ba8
+0,   31039000,   31039000,  1679000,       14, 0x0809012b
+0,   31040000,   31040000,   359000,       14, 0x0879013b
+0,   31399000,   31399000,   359000,       14, 0x08e9014b
+0,   31400000,   31400000,   479000,       14, 0x0959015b
+0,   31879000,   31879000,   479000,       14, 0x09c9016b
diff --git a/tests/ref/fate/sub2video b/tests/ref/fate/sub2video
index 80abe9c905..01b4800967 100644
--- a/tests/ref/fate/sub2video
+++ b/tests/ref/fate/sub2video
@@ -36,151 +36,109 @@
 0,         25,         25,        1,   518400, 0x7322e11c
 0,         26,         26,        1,   518400, 0x45af1a84
 0,         27,         27,        1,   518400, 0x7b781071
-0,         28,         28,        1,   518400, 0x4f7c706c
-0,         29,         29,        1,   518400, 0xb227603b
-0,         30,         30,        1,   518400, 0x7b4b89c2
-0,         31,         31,        1,   518400, 0x456da21e
-0,         32,         32,        1,   518400, 0xb691979f
-0,         33,         33,        1,   518400, 0x0dfaa66d
-0,         34,         34,        1,   518400, 0x191a6f23
-0,         35,         35,        1,   518400, 0xa03b2605
-0,         36,         36,        1,   518400, 0xb36aff87
-0,         37,         37,        1,   518400, 0xf5f0bc4a
-0,         38,         38,        1,   518400, 0x863d701a
-0,         39,         39,        1,   518400, 0xd11b4dce
-0,         40,         40,        1,   518400, 0x969236bd
-0,         41,         41,        1,   518400, 0xb60a485c
-0,         42,         42,        1,   518400, 0xe9796621
-0,         43,         43,        1,   518400, 0x3e8fc04b
-0,         44,         44,        1,   518400, 0xac9944e3
-0,         45,         45,        1,   518400, 0x01452b4d
-0,         46,         46,        1,   518400, 0xb384f6d2
-0,         47,         47,        1,   518400, 0xde69683f
-0,         48,         48,        1,   518400, 0x7df08fba
-0,         49,         49,        1,   518400, 0xbab197ea
+0,         28,         28,        1,   518400, 0x08a0ed62
+0,         29,         29,        1,   518400, 0x39b1e7eb
+0,         30,         30,        1,   518400, 0x20a11073
+0,         31,         31,        1,   518400, 0x7e19198d
+0,         32,         32,        1,   518400, 0xeed206eb
+0,         33,         33,        1,   518400, 0xcf451b3d
+0,         34,         34,        1,   518400, 0xa0a2eb3c
+0,         35,         35,        1,   518400, 0xd598a9e3
+0,         36,         36,        1,   518400, 0x10908608
+0,         37,         37,        1,   518400, 0xa3a03b86
+0,         38,         38,        1,   518400, 0x0190e39a
+0,         39,         39,        1,   518400, 0x5d39b978
+0,         40,         40,        1,   518400, 0x5ba29f40
+0,         41,         41,        1,   518400, 0x86c1b3ed
+0,         42,         42,        1,   518400, 0x77b1d91b
+0,         43,         43,        1,   518400, 0xa28d38d6
+0,         44,         44,        1,   518400, 0xc86abb34
+0,         45,         45,        1,   518400, 0xe753a664
+0,         46,         46,        1,   518400, 0xc7ea803c
+0,         47,         47,        1,   518400, 0x797eff2d
+0,         48,         48,        1,   518400, 0xc69c300c
+0,         49,         49,        1,   518400, 0x8d21303f
 1,   15355000,   15355000,  4733000,     2094, 0x3c171425
 0,         77,         77,        1,   518400, 0x902285d9
-0,        100,        100,        1,   518400, 0xbab197ea
 1,   48797000,   48797000,  2560000,     2480, 0x7c0edf21
 0,        244,        244,        1,   518400, 0x7a11c812
-0,        257,        257,        1,   518400, 0xbab197ea
+0,        257,        257,        1,   518400, 0x34cdddee
 1,   51433000,   51433000,  2366000,     3059, 0xc95b8a05
-0,        258,        258,        1,   518400, 0x34cdddee
-0,        269,        269,        1,   518400, 0xbab197ea
 1,   53910000,   53910000,  2696000,     2095, 0x61bb15ed
 0,        270,        270,        1,   518400, 0x4db4ce51
-0,        283,        283,        1,   518400, 0xbab197ea
+0,        283,        283,        1,   518400, 0xe6bc0ea9
 1,   56663000,   56663000,  1262000,     1013, 0xc9ae89b7
-0,        284,        284,        1,   518400, 0xe6bc0ea9
-0,        290,        290,        1,   518400, 0xbab197ea
+0,        290,        290,        1,   518400, 0xa8643af7
 1,   58014000,   58014000,  1661000,      969, 0xe01878f0
-0,        291,        291,        1,   518400, 0xa8643af7
-0,        298,        298,        1,   518400, 0xbab197ea
 1,   67724000,   67724000,  1365000,      844, 0xe7db4fc1
 0,        339,        339,        1,   518400, 0xb1885c67
-0,        345,        345,        1,   518400, 0xbab197ea
 1,   69175000,   69175000,  1558000,      802, 0xf48531ba
 0,        346,        346,        1,   518400, 0x378e3fd0
-0,        354,        354,        1,   518400, 0xbab197ea
+0,        354,        354,        1,   518400, 0xa3782469
 1,   70819000,   70819000,  1865000,     1709, 0xb4d5a1bd
-0,        355,        355,        1,   518400, 0xa3782469
-0,        363,        363,        1,   518400, 0xbab197ea
 1,   72762000,   72762000,  1968000,     2438, 0x99d7bc82
 0,        364,        364,        1,   518400, 0xba23a0d5
-0,        374,        374,        1,   518400, 0xbab197ea
+0,        374,        374,        1,   518400, 0x129de2f8
 1,   74806000,   74806000,  1831000,     2116, 0x96514097
-0,        375,        375,        1,   518400, 0x129de2f8
-0,        383,        383,        1,   518400, 0xbab197ea
 1,   76716000,   76716000,  1262000,     1822, 0xefccc72e
 0,        384,        384,        1,   518400, 0x19772f0f
-0,        390,        390,        1,   518400, 0xbab197ea
+0,        390,        390,        1,   518400, 0x56f54e73
 1,   78051000,   78051000,  1524000,      987, 0x7b927a27
-0,        391,        391,        1,   518400, 0x56f54e73
-0,        398,        398,        1,   518400, 0xbab197ea
+0,        398,        398,        1,   518400, 0x300b5247
 1,   79644000,   79644000,  2662000,     2956, 0x190778f7
-0,        399,        399,        1,   518400, 0x300b5247
 1,   82380000,   82380000,  2764000,     3094, 0xc021b7d3
-0,        412,        412,        1,   518400, 0xbab197ea
-0,        413,        413,        1,   518400, 0x6fd028fa
-0,        426,        426,        1,   518400, 0xbab197ea
+0,        412,        412,        1,   518400, 0x6fd028fa
+0,        426,        426,        1,   518400, 0x01f80e9d
 1,   85225000,   85225000,  2366000,     2585, 0x74d0048f
-0,        427,        427,        1,   518400, 0x01f80e9d
-0,        438,        438,        1,   518400, 0xbab197ea
+0,        438,        438,        1,   518400, 0xb48d90c0
 1,   87652000,   87652000,  1831000,      634, 0x8832fda1
-0,        439,        439,        1,   518400, 0xb48d90c0
-0,        447,        447,        1,   518400, 0xbab197ea
 1,   91531000,   91531000,  2332000,     2080, 0x97a1146f
 0,        458,        458,        1,   518400, 0xcb5a0173
-0,        469,        469,        1,   518400, 0xbab197ea
 1,   95510000,   95510000,  3299000,     2964, 0x8b8f6684
 0,        478,        478,        1,   518400, 0xb8a323e4
-0,        494,        494,        1,   518400, 0xbab197ea
+0,        494,        494,        1,   518400, 0xc43518ba
 1,   98872000,   98872000,  2161000,     1875, 0x9002ef71
-0,        495,        495,        1,   518400, 0xc43518ba
-0,        505,        505,        1,   518400, 0xbab197ea
 1,  101124000,  101124000,  4096000,     3872, 0x20c6ed9c
 0,        506,        506,        1,   518400, 0x04e38692
-0,        526,        526,        1,   518400, 0xbab197ea
 1,  105303000,  105303000,  2730000,     3094, 0xf203a663
 0,        527,        527,        1,   518400, 0x856b0ee5
-0,        540,        540,        1,   518400, 0xbab197ea
 1,  108106000,  108106000,  2059000,     2404, 0x41a7b429
 0,        541,        541,        1,   518400, 0x3e5beee2
-0,        551,        551,        1,   518400, 0xbab197ea
 1,  141556000,  141556000,  1661000,     1088, 0xde20aa20
 0,        708,        708,        1,   518400, 0xb8bc1365
-0,        716,        716,        1,   518400, 0xbab197ea
 0,        817,        817,        1,   518400, 0x83efa32d
 1,  163445000,  163445000,  1331000,      339, 0x8bd186ef
-0,        824,        824,        1,   518400, 0xbab197ea
 0,        840,        840,        1,   518400, 0x03ea0e90
 1,  168049000,  168049000,  1900000,     1312, 0x0bf20e8d
-0,        850,        850,        1,   518400, 0xbab197ea
+0,        850,        850,        1,   518400, 0x8780239e
 1,  170035000,  170035000,  1524000,     1279, 0xb6c2dafe
-0,        851,        851,        1,   518400, 0x8780239e
-0,        858,        858,        1,   518400, 0xbab197ea
 0,        861,        861,        1,   518400, 0x6eb72347
 1,  172203000,  172203000,  1695000,     1826, 0x9a1ac769
-0,        869,        869,        1,   518400, 0xbab197ea
 1,  173947000,  173947000,  1934000,     1474, 0xa9b03cdc
 0,        870,        870,        1,   518400, 0x9c4a3a3d
-0,        879,        879,        1,   518400, 0xbab197ea
 1,  175957000,  175957000,  1763000,     1019, 0x20409355
 0,        880,        880,        1,   518400, 0xc9ebfa89
-0,        889,        889,        1,   518400, 0xbab197ea
 0,        946,        946,        1,   518400, 0xbaf801ef
 1,  189295000,  189295000,  1968000,     1596, 0x408c726e
-0,        956,        956,        1,   518400, 0xbab197ea
 1,  191356000,  191356000,  1228000,     1517, 0xae8c5c2b
 0,        957,        957,        1,   518400, 0x59f4e72f
-0,        963,        963,        1,   518400, 0xbab197ea
+0,        963,        963,        1,   518400, 0x9d5b9d69
 1,  192640000,  192640000,  1763000,     2506, 0xa458d6d4
-0,        964,        964,        1,   518400, 0x9d5b9d69
-0,        972,        972,        1,   518400, 0xbab197ea
 1,  195193000,  195193000,  1092000,     1074, 0x397ba9a8
 0,        976,        976,        1,   518400, 0x923d1ce7
-0,        981,        981,        1,   518400, 0xbab197ea
 1,  196361000,  196361000,  1524000,     1715, 0x695ca41e
 0,        982,        982,        1,   518400, 0x6e652cd2
-0,        989,        989,        1,   518400, 0xbab197ea
 1,  197946000,  197946000,  1160000,      789, 0xc63a189e
 0,        990,        990,        1,   518400, 0x25113966
-0,        996,        996,        1,   518400, 0xbab197ea
+0,        996,        996,        1,   518400, 0x2dc83609
 1,  199230000,  199230000,  1627000,     1846, 0xeea8c599
-0,        997,        997,        1,   518400, 0x2dc83609
-0,       1004,       1004,        1,   518400, 0xbab197ea
 1,  200924000,  200924000,  1763000,      922, 0xd4a87222
 0,       1005,       1005,        1,   518400, 0x90483bc6
-0,       1013,       1013,        1,   518400, 0xbab197ea
 0,       1053,       1053,        1,   518400, 0x3de86ab7
 1,  210600000,  210600000,  1831000,      665, 0x55580135
-0,       1062,       1062,        1,   518400, 0xbab197ea
 1,  214771000,  214771000,  1558000,     1216, 0x50d1f6c5
 0,       1074,       1074,        1,   518400, 0x8c320e68
-0,       1082,       1082,        1,   518400, 0xbab197ea
 0,       1128,       1128,        1,   518400, 0x81e977b2
 1,  225640000,  225640000,  2127000,     2133, 0x670c11a5
-0,       1139,       1139,        1,   518400, 0xbab197ea
+0,       1139,       1139,        1,   518400, 0xb046dd30
 1,  227834000,  227834000,  1262000,     1264, 0xc1d9fc57
-0,       1140,       1140,        1,   518400, 0xb046dd30
-0,       1145,       1145,        1,   518400, 0xbab197ea
diff --git a/tests/ref/fate/sub2video_basic b/tests/ref/fate/sub2video_basic
index 5f72e292c9..41e02c057c 100644
--- a/tests/ref/fate/sub2video_basic
+++ b/tests/ref/fate/sub2video_basic
@@ -2,94 +2,47 @@
 #media_type 0: video
 #codec_id 0: rawvideo
 #dimensions 0: 720x480
-#sar 0: 0/1
-0,       3312,       3312,        1,  1382400, 0x00000000
-0,       3312,       3312,        1,  1382400, 0x8c93c2ba
-0,       3436,       3436,        1,  1382400, 0x00000000
-0,       3684,       3684,        1,  1382400, 0xb02e32ca
-0,       3802,       3802,        1,  1382400, 0x00000000
-0,       4520,       4520,        1,  1382400, 0x83b71116
-0,       4584,       4584,        1,  1382400, 0x00000000
-0,       4586,       4586,        1,  1382400, 0x85547fd1
-0,       4645,       4645,        1,  1382400, 0x00000000
-0,       4648,       4648,        1,  1382400, 0x00000000
-0,       4648,       4648,        1,  1382400, 0xb6a8f181
-0,       4715,       4715,        1,  1382400, 0x00000000
-0,       4717,       4717,        1,  1382400, 0xb64d1a2c
-0,       4748,       4748,        1,  1382400, 0x00000000
-0,       4750,       4750,        1,  1382400, 0x7b37ecf3
-0,       4792,       4792,        1,  1382400, 0x00000000
-0,       4993,       4993,        1,  1382400, 0xdc025bd1
-0,       5027,       5027,        1,  1382400, 0x00000000
-0,       5029,       5029,        1,  1382400, 0x688b294d
-0,       5068,       5068,        1,  1382400, 0x00000000
-0,       5070,       5070,        1,  1382400, 0xa2b33d1b
-0,       5117,       5117,        1,  1382400, 0x00000000
-0,       5119,       5119,        1,  1382400, 0xb3e525e3
-0,       5168,       5168,        1,  1382400, 0x00000000
-0,       5170,       5170,        1,  1382400, 0xaa8fbdd7
-0,       5216,       5216,        1,  1382400, 0x00000000
-0,       5218,       5218,        1,  1382400, 0x7b7f26dd
-0,       5249,       5249,        1,  1382400, 0x00000000
-0,       5251,       5251,        1,  1382400, 0x15e2f836
-0,       5289,       5289,        1,  1382400, 0x00000000
-0,       5291,       5291,        1,  1382400, 0x0fee9b0c
-0,       5358,       5358,        1,  1382400, 0x00000000
-0,       5360,       5360,        1,  1382400, 0x89d62791
-0,       5429,       5429,        1,  1382400, 0x00000000
-0,       5431,       5431,        1,  1382400, 0xa6a9fd74
-0,       5490,       5490,        1,  1382400, 0x00000000
-0,       5491,       5491,        1,  1382400, 0x7896178d
-0,       5537,       5537,        1,  1382400, 0x00000000
-0,       5588,       5588,        1,  1382400, 0x01751a52
-0,       5647,       5647,        1,  1382400, 0x00000000
-0,       5688,       5688,        1,  1382400, 0xa3959c6f
-0,       5770,       5770,        1,  1382400, 0x00000000
-0,       5772,       5772,        1,  1382400, 0x3d3ea47b
-0,       5826,       5826,        1,  1382400, 0x00000000
-0,       5828,       5828,        1,  1382400, 0x593f8b24
-0,       5931,       5931,        1,  1382400, 0x00000000
-0,       5933,       5933,        1,  1382400, 0x171f05ba
-0,       6001,       6001,        1,  1382400, 0x00000000
-0,       6003,       6003,        1,  1382400, 0xb014cdf1
-0,       6054,       6054,        1,  1382400, 0x00000000
-0,       6839,       6839,        1,  1382400, 0xd918e667
-0,       6880,       6880,        1,  1382400, 0x00000000
-0,       7386,       7386,        1,  1382400, 0xc9406331
-0,       7419,       7419,        1,  1382400, 0x00000000
-0,       7501,       7501,        1,  1382400, 0xaf08b10d
-0,       7549,       7549,        1,  1382400, 0x00000000
-0,       7551,       7551,        1,  1382400, 0x00000000
-0,       7551,       7551,        1,  1382400, 0x853a9d93
-0,       7589,       7589,        1,  1382400, 0x00000000
-0,       7605,       7605,        1,  1382400, 0x7491a87d
-0,       7647,       7647,        1,  1382400, 0x00000000
-0,       7649,       7649,        1,  1382400, 0xf7383c58
-0,       7697,       7697,        1,  1382400, 0x00000000
-0,       7699,       7699,        1,  1382400, 0xe66be411
-0,       7743,       7743,        1,  1382400, 0x00000000
-0,       8032,       8032,        1,  1382400, 0xd6850362
-0,       8082,       8082,        1,  1382400, 0x00000000
-0,       8084,       8084,        1,  1382400, 0x3e1ed109
-0,       8115,       8115,        1,  1382400, 0x00000000
-0,       8116,       8116,        1,  1382400, 0x39c1b7bd
-0,       8160,       8160,        1,  1382400, 0x00000000
-0,       8180,       8180,        1,  1382400, 0x35b85f2e
-0,       8207,       8207,        1,  1382400, 0x00000000
-0,       8209,       8209,        1,  1382400, 0x00000000
-0,       8209,       8209,        1,  1382400, 0x83f103e5
-0,       8247,       8247,        1,  1382400, 0x00000000
-0,       8249,       8249,        1,  1382400, 0xbc1ca9b3
-0,       8278,       8278,        1,  1382400, 0x00000000
-0,       8281,       8281,        1,  1382400, 0x94d4a51e
-0,       8321,       8321,        1,  1382400, 0x00000000
-0,       8323,       8323,        1,  1382400, 0xf88cdfde
-0,       8367,       8367,        1,  1382400, 0x00000000
-0,       8565,       8565,        1,  1382400, 0xdd51423b
-0,       8611,       8611,        1,  1382400, 0x00000000
-0,       8669,       8669,        1,  1382400, 0x08259fa4
-0,       8708,       8708,        1,  1382400, 0x00000000
-0,       8941,       8941,        1,  1382400, 0x1663fa34
-0,       8994,       8994,        1,  1382400, 0x00000000
-0,       8996,       8996,        1,  1382400, 0xda2ceb55
-0,       9027,       9027,        1,  1382400, 0x00000000
+#sar 0: 1/1
+0,       3312,       3312,        1,  1382400, 0xc637b893
+0,       3684,       3684,        1,  1382400, 0x4c2960ca
+0,       4520,       4520,        1,  1382400, 0x5fa18966
+0,       4586,       4586,        1,  1382400, 0x55f4b7b1
+0,       4648,       4648,        1,  1382400, 0xdfa4cf32
+0,       4717,       4717,        1,  1382400, 0x35023df8
+0,       4750,       4750,        1,  1382400, 0xed933219
+0,       4993,       4993,        1,  1382400, 0x1b26389a
+0,       5029,       5029,        1,  1382400, 0xf0c7028b
+0,       5070,       5070,        1,  1382400, 0x395f521d
+0,       5119,       5119,        1,  1382400, 0x1ea87415
+0,       5170,       5170,        1,  1382400, 0xc6effdc1
+0,       5218,       5218,        1,  1382400, 0xba6846f8
+0,       5251,       5251,        1,  1382400, 0x033c5d5b
+0,       5291,       5291,        1,  1382400, 0xef5abf66
+0,       5360,       5360,        1,  1382400, 0xec747954
+0,       5431,       5431,        1,  1382400, 0xfa34bcaf
+0,       5491,       5491,        1,  1382400, 0x8b7a709b
+0,       5588,       5588,        1,  1382400, 0xc333382f
+0,       5688,       5688,        1,  1382400, 0xabe5dfcf
+0,       5772,       5772,        1,  1382400, 0x56948101
+0,       5828,       5828,        1,  1382400, 0xb747834a
+0,       5933,       5933,        1,  1382400, 0x3448baad
+0,       6003,       6003,        1,  1382400, 0xaabe4f37
+0,       6839,       6839,        1,  1382400, 0x8a48cd6f
+0,       7386,       7386,        1,  1382400, 0x49518c43
+0,       7501,       7501,        1,  1382400, 0x4a72fa21
+0,       7551,       7551,        1,  1382400, 0xa82f7de8
+0,       7605,       7605,        1,  1382400, 0xeba0b5f3
+0,       7649,       7649,        1,  1382400, 0xd6a91770
+0,       7699,       7699,        1,  1382400, 0x222f827c
+0,       8032,       8032,        1,  1382400, 0x3270f4ff
+0,       8084,       8084,        1,  1382400, 0x40813cb3
+0,       8116,       8116,        1,  1382400, 0x9d8fde41
+0,       8180,       8180,        1,  1382400, 0xc6d7a701
+0,       8209,       8209,        1,  1382400, 0x9d45f2dc
+0,       8249,       8249,        1,  1382400, 0x8525ee40
+0,       8281,       8281,        1,  1382400, 0x5b26b98b
+0,       8323,       8323,        1,  1382400, 0x51be311f
+0,       8565,       8565,        1,  1382400, 0x00a4f2a3
+0,       8669,       8669,        1,  1382400, 0x40a445e8
+0,       8941,       8941,        1,  1382400, 0x43ef5128
+0,       8996,       8996,        1,  1382400, 0x3c3e3819
diff --git a/tests/ref/fate/sub2video_time_limited b/tests/ref/fate/sub2video_time_limited
index 9fb6fb06f9..715af02fee 100644
--- a/tests/ref/fate/sub2video_time_limited
+++ b/tests/ref/fate/sub2video_time_limited
@@ -2,7 +2,5 @@
 #media_type 0: video
 #codec_id 0: rawvideo
 #dimensions 0: 1920x1080
-#sar 0: 0/1
-0,          2,          2,        1,  8294400, 0x00000000
+#sar 0: 1/1
 0,          2,          2,        1,  8294400, 0xa87c518f
-0,         10,         10,        1,  8294400, 0xa87c518f
-- 
2.30.2.windows.1



More information about the ffmpeg-devel mailing list