[FFmpeg-devel] [PATCH v4 6/6] ffmpeg: Deprecate display rotation override with a metadata key

[Thilo Borgmann]

From: Jan Ekström <jeebjp at gmail.com>

Now that we have proper options for defining display matrix
overrides, this should no longer be required.

fftools does not have its own versioning, so for now the define is
just set to 1 and disables the functionality if set to zero.
---
 fftools/ffmpeg.c     |  2 ++
 fftools/ffmpeg.h     |  5 +++++
 fftools/ffmpeg_opt.c | 10 ++++++++++
 3 files changed, 17 insertions(+)

diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index 0e1477299d..65b0b83a18 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -2831,12 +2831,14 @@ static int init_output_stream_streamcopy(OutputStream *ost)
         }
     }
 
+#if FFMPEG_ROTATION_METADATA
     if (ost->rotate_overridden) {
         uint8_t *sd = av_stream_new_side_data(ost->st, AV_PKT_DATA_DISPLAYMATRIX,
                                               sizeof(int32_t) * 9);
         if (sd)
             av_display_rotation_set((int32_t *)sd, -ost->rotate_override_value);
     }
+#endif
 
     switch (par->codec_type) {
     case AVMEDIA_TYPE_AUDIO:
diff --git a/fftools/ffmpeg.h b/fftools/ffmpeg.h
index 524a1d415a..c134b15726 100644
--- a/fftools/ffmpeg.h
+++ b/fftools/ffmpeg.h
@@ -53,6 +53,7 @@
 #define FFMPEG_OPT_PSNR 1
 #define FFMPEG_OPT_MAP_CHANNEL 1
 #define FFMPEG_OPT_MAP_SYNC 1
+#define FFMPEG_ROTATION_METADATA 1
 
 enum VideoSyncMethod {
     VSYNC_AUTO = -1,
@@ -532,11 +533,15 @@ typedef struct OutputStream {
     int is_cfr;
     int force_fps;
     int top_field_first;
+#if FFMPEG_ROTATION_METADATA
     int rotate_overridden;
+#endif
     int autoscale;
     int bitexact;
     int bits_per_raw_sample;
+#if FFMPEG_ROTATION_METADATA
     double rotate_override_value;
+#endif
 
     AVRational frame_aspect_ratio;
 
diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index ba56267460..71e62d0aa7 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -2960,16 +2960,26 @@ static void of_add_metadata(AVFormatContext *oc, const OptionsContext *o)
             for (int j = 0; j < oc->nb_streams; j++) {
                 OutputStream *ost = output_streams[nb_output_streams - oc->nb_streams + j];
                 if ((ret = check_stream_specifier(oc, oc->streams[j], stream_spec)) > 0) {
+#if FFMPEG_ROTATION_METADATA
                     if (!strcmp(o->metadata[i].u.str, "rotate")) {
                         char *tail;
                         double theta = av_strtod(val, &tail);
                         if (!*tail) {
                             ost->rotate_overridden = 1;
                             ost->rotate_override_value = theta;
+
+                        av_log(NULL, AV_LOG_WARNING,
+                               "Conversion of a 'rotate' metadata key to a "
+                               "proper display matrix rotation is deprecated. "
+                               "See -display_matrix for setting rotation "
+                               "instead.");
                         }
                     } else {
+#endif
                         av_dict_set(&oc->streams[j]->metadata, o->metadata[i].u.str, *val ? val : NULL, 0);
+#if FFMPEG_ROTATION_METADATA
                     }
+#endif
                 } else if (ret < 0)
                     exit_program(1);
             }
-- 
2.20.1 (Apple Git-117)