[FFmpeg-devel] [PATCH] lavfi: Add cropdetect_video filter
Thilo Borgmann
thilo.borgmann at mail.de
Sat Jul 2 12:55:06 EEST 2022
Hi,
$subject allows crop detection even if the video is embedded in non-black areas.
Shares logic and purpose of lavfi/vf_cropdetect, though its edge detection is 8-bit formats only. Therefore this ends up in a separate filter.
It would also benew GPL code if it shares living in lavfi/vf_cropdetect.c - if we'd like to add this as LGPL for some reason it might go into its own file without sharing (useful) logic with the existing cropdetect.
Thanks,
Thilo
-------------- next part --------------
From 9050d15c2f1bcb3b2a628c8b6f04ea3a5f7e69d1 Mon Sep 17 00:00:00 2001
From: Thilo Borgmann <thilo.borgmann at mail.de>
Date: Sat, 2 Jul 2022 11:42:47 +0200
Subject: [PATCH] lavfi: Add cropdetect_video filter
This filter allows crop detection even if the video is embedded in non-black areas.
---
Changelog | 1 +
doc/filters.texi | 69 +++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter/vf_cropdetect.c | 245 +++++++++++++++++-
tests/fate/filter-video.mak | 8 +
.../fate/filter-metadata-cropdetect_video1 | 9 +
.../fate/filter-metadata-cropdetect_video2 | 9 +
9 files changed, 343 insertions(+), 2 deletions(-)
create mode 100644 tests/ref/fate/filter-metadata-cropdetect_video1
create mode 100644 tests/ref/fate/filter-metadata-cropdetect_video2
diff --git a/Changelog b/Changelog
index d4ca674b1b..3b5a4880cb 100644
--- a/Changelog
+++ b/Changelog
@@ -19,6 +19,7 @@ version 5.1:
- blurdetect filter
- tiltshelf audio filter
- QOI image format support
+- cropdetect_video video filter
version 5.0:
diff --git a/doc/filters.texi b/doc/filters.texi
index d65e83d4d0..5117e12623 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -10108,6 +10108,75 @@ indicates 'never reset', and returns the largest area encountered during
playback.
@end table
+ at anchor{cropdetect_video}
+ at section cropdetect_video
+
+Auto-detect the crop size.
+
+It calculates the necessary cropping parameters and prints the
+recommended parameters via the logging system. The detected dimensions
+correspond to the video playback area of the input video.
+It can detect videos embedded even in non-black areas although it supports only 8 bit pixel formats.
+
+It accepts the following parameters:
+
+ at table @option
+
+ at item mv_threshold
+Set motion in pixel units as threshold for motion detection. It defaults to 8.
+
+ at item low
+ at item high
+Set low and high threshold values used by the Canny thresholding
+algorithm.
+
+The high threshold selects the "strong" edge pixels, which are then
+connected through 8-connectivity with the "weak" edge pixels selected
+by the low threshold.
+
+ at var{low} and @var{high} threshold values must be chosen in the range
+[0,1], and @var{low} should be lesser or equal to @var{high}.
+
+Default value for @var{low} is @code{5/255}, and default value for @var{high}
+is @code{15/255}.
+
+ at item round
+The value which the width/height should be divisible by. It defaults to
+16. The offset is automatically adjusted to center the video. Use 2 to
+get only even dimensions (needed for 4:2:2 video). 16 is best when
+encoding to most video codecs.
+
+ at item skip
+Set the number of initial frames for which evaluation is skipped.
+Default is 2. Range is 0 to INT_MAX.
+
+ at item reset_count, reset
+Set the counter that determines after how many frames cropdetect will
+reset the previously detected largest video area and start over to
+detect the current optimal crop area. Default value is 0.
+
+This can be useful when channel logos distort the video area. 0
+indicates 'never reset', and returns the largest area encountered during
+playback.
+ at end table
+
+ at subsection Examples
+
+ at itemize
+ at item
+Find an embedded video area, generate motion vectors beforehand:
+ at example
+ffmpeg -i file.mp4 -vf mestimate,cropdetect_video,metadata=mode=print -f null -
+ at end example
+
+ at item
+Find an embedded video area, use motion vectors from decoder:
+ at example
+ffmpeg -flags2 +export_mvs -i file.mp4 -vf cropdetect_video,metadata=mode=print -f null -
+ at end example
+ at end itemize
+
+
@anchor{cue}
@section cue
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index e0e4d0de2c..8e4b4d33b1 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -235,6 +235,7 @@ OBJS-$(CONFIG_COREIMAGE_FILTER) += vf_coreimage.o
OBJS-$(CONFIG_COVER_RECT_FILTER) += vf_cover_rect.o lavfutils.o
OBJS-$(CONFIG_CROP_FILTER) += vf_crop.o
OBJS-$(CONFIG_CROPDETECT_FILTER) += vf_cropdetect.o
+OBJS-$(CONFIG_CROPDETECT_VIDEO_FILTER) += vf_cropdetect.o
OBJS-$(CONFIG_CUE_FILTER) += f_cue.o
OBJS-$(CONFIG_CURVES_FILTER) += vf_curves.o
OBJS-$(CONFIG_DATASCOPE_FILTER) += vf_datascope.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 2f72477523..d68746a4b0 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -219,6 +219,7 @@ extern const AVFilter ff_vf_coreimage;
extern const AVFilter ff_vf_cover_rect;
extern const AVFilter ff_vf_crop;
extern const AVFilter ff_vf_cropdetect;
+extern const AVFilter ff_vf_cropdetect_video;
extern const AVFilter ff_vf_cue;
extern const AVFilter ff_vf_curves;
extern const AVFilter ff_vf_datascope;
diff --git a/libavfilter/version.h b/libavfilter/version.h
index 86b33c4174..814ab071da 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -31,7 +31,7 @@
#include "version_major.h"
-#define LIBAVFILTER_VERSION_MINOR 40
+#define LIBAVFILTER_VERSION_MINOR 41
#define LIBAVFILTER_VERSION_MICRO 100
diff --git a/libavfilter/vf_cropdetect.c b/libavfilter/vf_cropdetect.c
index b887b9ecb1..f2e25ff90d 100644
--- a/libavfilter/vf_cropdetect.c
+++ b/libavfilter/vf_cropdetect.c
@@ -26,11 +26,14 @@
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
+#include "libavutil/motion_vector.h"
+#include "libavutil/qsort.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
+#include "edge_common.h"
typedef struct CropDetectContext {
const AVClass *class;
@@ -42,6 +45,16 @@ typedef struct CropDetectContext {
int frame_nb;
int max_pixsteps[4];
int max_outliers;
+ int mode;
+ int window_size;
+ int mv_threshold;
+ float low, high;
+ uint8_t low_u8, high_u8;
+ uint8_t *filterbuf;
+ uint8_t *tmpbuf;
+ uint16_t *gradients;
+ char *directions;
+ int *bboxes[4];
} CropDetectContext;
static const enum AVPixelFormat pix_fmts[] = {
@@ -61,6 +74,29 @@ static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_NONE
};
+static const enum AVPixelFormat pix_fmts_video[] = {
+ AV_PIX_FMT_GRAY8,
+ AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
+ AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
+ AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
+ AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
+ AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P,
+ AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
+ AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
+ AV_PIX_FMT_NONE
+};
+
+enum CropMode {
+ MODE_BELOW_TH,
+ MODE_MV_EDGES,
+ MODE_NB
+};
+
+static int comp(const int *a,const int *b)
+{
+ return FFDIFFSIGN(*a, *b);
+}
+
static int checkline(void *ctx, const unsigned char *src, int stride, int len, int bpp)
{
int total = 0;
@@ -116,6 +152,36 @@ static int checkline(void *ctx, const unsigned char *src, int stride, int len, i
return total;
}
+static int checkline_edge(void *ctx, const unsigned char *src, int stride, int len, int bpp)
+{
+ const uint16_t *src16 = (const uint16_t *)src;
+
+ switch (bpp) {
+ case 1:
+ while (--len >= 0) {
+ if(src[0]) return 0;
+ src += stride;
+ }
+ break;
+ case 2:
+ stride >>= 1;
+ while (--len >= 0) {
+ if(src16[0]) return 0;
+ src16 += stride;
+ }
+ break;
+ case 3:
+ case 4:
+ while (--len >= 0) {
+ if(src[0] || src[1] || src[2]) return 0;
+ src += stride;
+ }
+ break;
+ }
+
+ return 1;
+}
+
static av_cold int init(AVFilterContext *ctx)
{
CropDetectContext *s = ctx->priv;
@@ -128,6 +194,31 @@ static av_cold int init(AVFilterContext *ctx)
return 0;
}
+static av_cold int init_video(AVFilterContext *ctx)
+{
+ CropDetectContext *s = ctx->priv;
+
+ s->mode = MODE_MV_EDGES;
+ s->low_u8 = s->low * 255. + .5;
+ s->high_u8 = s->high * 255. + .5;
+
+ return init(ctx);
+}
+
+static av_cold void uninit_video(AVFilterContext *ctx)
+{
+ CropDetectContext *s = ctx->priv;
+
+ av_freep(&s->tmpbuf);
+ av_freep(&s->filterbuf);
+ av_freep(&s->gradients);
+ av_freep(&s->directions);
+ av_freep(&s->bboxes[0]);
+ av_freep(&s->bboxes[1]);
+ av_freep(&s->bboxes[2]);
+ av_freep(&s->bboxes[3]);
+}
+
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
@@ -147,6 +238,29 @@ static int config_input(AVFilterLink *inlink)
return 0;
}
+static int config_input_video(AVFilterLink *inlink)
+{
+ AVFilterContext *ctx = inlink->dst;
+ CropDetectContext *s = ctx->priv;
+ const int bufsize = inlink->w * inlink->h;
+
+ s->window_size = FFMAX(s->reset_count, 15);
+ s->tmpbuf = av_malloc(bufsize);
+ s->filterbuf = av_malloc(bufsize);
+ s->gradients = av_calloc(bufsize, sizeof(*s->gradients));
+ s->directions = av_malloc(bufsize);
+ s->bboxes[0] = av_malloc(s->window_size * sizeof(*s->bboxes[0]));
+ s->bboxes[1] = av_malloc(s->window_size * sizeof(*s->bboxes[1]));
+ s->bboxes[2] = av_malloc(s->window_size * sizeof(*s->bboxes[2]));
+ s->bboxes[3] = av_malloc(s->window_size * sizeof(*s->bboxes[3]));
+
+ if (!s->tmpbuf || !s->filterbuf || !s->gradients || !s->directions ||
+ !s->bboxes[0] || !s->bboxes[1] || !s->bboxes[2] || !s->bboxes[3])
+ return AVERROR(ENOMEM);
+
+ return config_input(inlink);
+}
+
#define SET_META(key, value) \
av_dict_set_int(metadata, key, value, 0)
@@ -155,11 +269,20 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
AVFilterContext *ctx = inlink->dst;
CropDetectContext *s = ctx->priv;
int bpp = s->max_pixsteps[0];
- int w, h, x, y, shrink_by;
+ int w, h, x, y, shrink_by, i;
AVDictionary **metadata;
int outliers, last_y;
int limit = lrint(s->limit);
+ const int inw = inlink->w;
+ const int inh = inlink->h;
+ uint8_t *tmpbuf = s->tmpbuf;
+ uint8_t *filterbuf = s->filterbuf;
+ uint16_t *gradients = s->gradients;
+ int8_t *directions = s->directions;
+ const AVFrameSideData *sd = NULL;
+ int scan_w, scan_h, bboff;
+
// ignore first s->skip frames
if (++s->frame_nb > 0) {
metadata = &frame->metadata;
@@ -185,11 +308,105 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
last_y = y INC;\
}
+ if (s->mode == MODE_BELOW_TH) {
FIND(s->y1, 0, y < s->y1, +1, frame->linesize[0], bpp, frame->width);
FIND(s->y2, frame->height - 1, y > FFMAX(s->y2, s->y1), -1, frame->linesize[0], bpp, frame->width);
FIND(s->x1, 0, y < s->x1, +1, bpp, frame->linesize[0], frame->height);
FIND(s->x2, frame->width - 1, y > FFMAX(s->x2, s->x1), -1, bpp, frame->linesize[0], frame->height);
+ } else { // MODE_MV_EDGES
+ sd = av_frame_get_side_data(frame, AV_FRAME_DATA_MOTION_VECTORS);
+ s->x1 = 0;
+ s->y1 = 0;
+ s->x2 = inw - 1;
+ s->y2 = inh - 1;
+
+ if (!sd) {
+ av_log(ctx, AV_LOG_WARNING, "Cannot detect: no motion vectors available");
+ } else {
+ // gaussian filter to reduce noise
+ ff_gaussian_blur(inw, inh,
+ filterbuf, inw,
+ frame->data[0], frame->linesize[0]);
+
+ // compute the 16-bits gradients and directions for the next step
+ ff_sobel(inw, inh, gradients, inw, directions, inw, filterbuf, inw);
+
+ // non_maximum_suppression() will actually keep & clip what's necessary and
+ // ignore the rest, so we need a clean output buffer
+ memset(tmpbuf, 0, inw * inh);
+ ff_non_maximum_suppression(inw, inh, tmpbuf, inw, directions, inw, gradients, inw);
+
+
+ // keep high values, or low values surrounded by high values
+ ff_double_threshold(s->low_u8, s->high_u8, inw, inh,
+ tmpbuf, inw, tmpbuf, inw);
+
+ // scan all MVs and store bounding box
+ s->x1 = inw - 1;
+ s->y1 = inh - 1;
+ s->x2 = 0;
+ s->y2 = 0;
+ for (i = 0; i < sd->size / sizeof(AVMotionVector); i++) {
+ const AVMotionVector *mv = (const AVMotionVector*)sd->data + i;
+ const int mx = mv->dst_x - mv->src_x;
+ const int my = mv->dst_y - mv->src_y;
+
+ if (mv->dst_x >= 0 && mv->dst_x < inw &&
+ mv->dst_y >= 0 && mv->dst_y < inh &&
+ mv->src_x >= 0 && mv->src_x < inw &&
+ mv->src_y >= 0 && mv->src_y < inh &&
+ mx * mx + my * my >= s->mv_threshold * s->mv_threshold) {
+ s->x1 = mv->dst_x < s->x1 ? mv->dst_x : s->x1;
+ s->y1 = mv->dst_y < s->y1 ? mv->dst_y : s->y1;
+ s->x2 = mv->dst_x > s->x2 ? mv->dst_x : s->x2;
+ s->y2 = mv->dst_y > s->y2 ? mv->dst_y : s->y2;
+ }
+ }
+
+ // scan outward looking for 0-edge-lines in edge image
+ scan_w = s->x2 - s->x1;
+ scan_h = s->y2 - s->y1;
+
+#define FIND_EDGE(DST, FROM, NOEND, INC, STEP0, STEP1, LEN) \
+ for (last_y = y = FROM; NOEND; y = y INC) { \
+ if (checkline_edge(ctx, tmpbuf + STEP0 * y, STEP1, LEN, bpp)) { \
+ if (last_y INC == y) { \
+ DST = y; \
+ break; \
+ } else \
+ last_y = y; \
+ } \
+ } \
+ if (!(NOEND)) { \
+ DST = y -(INC); \
+ }
+ FIND_EDGE(s->y1, s->y1, y >= 0, -1, inw, bpp, scan_w);
+ FIND_EDGE(s->y2, s->y2, y < inh, +1, inw, bpp, scan_w);
+ FIND_EDGE(s->x1, s->x1, y >= 0, -1, bpp, inw, scan_h);
+ FIND_EDGE(s->x2, s->x2, y < inw, +1, bpp, inw, scan_h);
+
+ // queue bboxes
+ bboff = (s->frame_nb - 1) % s->window_size;
+ s->bboxes[0][bboff] = s->x1;
+ s->bboxes[1][bboff] = s->x2;
+ s->bboxes[2][bboff] = s->y1;
+ s->bboxes[3][bboff] = s->y2;
+
+ // sort queue
+ bboff = FFMIN(s->frame_nb, s->window_size);
+ AV_QSORT(s->bboxes[0], bboff, int, comp);
+ AV_QSORT(s->bboxes[1], bboff, int, comp);
+ AV_QSORT(s->bboxes[2], bboff, int, comp);
+ AV_QSORT(s->bboxes[3], bboff, int, comp);
+
+ // return median of window_size elems
+ s->x1 = s->bboxes[0][bboff/2];
+ s->x2 = s->bboxes[1][bboff/2];
+ s->y1 = s->bboxes[2][bboff/2];
+ s->y2 = s->bboxes[3][bboff/2];
+ }
+ }
// round x and y (up), important for yuv colorspaces
// make sure they stay rounded!
@@ -243,10 +460,14 @@ static const AVOption cropdetect_options[] = {
{ "skip", "Number of initial frames to skip", OFFSET(skip), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, INT_MAX, FLAGS },
{ "reset_count", "Recalculate the crop area after this many frames",OFFSET(reset_count),AV_OPT_TYPE_INT,{ .i64 = 0 }, 0, INT_MAX, FLAGS },
{ "max_outliers", "Threshold count of outliers", OFFSET(max_outliers),AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
+ { "high", "Set high threshold for edge detection", OFFSET(high), AV_OPT_TYPE_FLOAT, {.dbl=25/255.}, 0, 1, FLAGS },
+ { "low", "Set low threshold for edge detection", OFFSET(low), AV_OPT_TYPE_FLOAT, {.dbl=15/255.}, 0, 1, FLAGS },
+ { "mv_threshold", "motion vector threshold when estimating video window size", OFFSET(mv_threshold), AV_OPT_TYPE_INT, {.i64=8}, 0, 100, FLAGS},
{ NULL }
};
AVFILTER_DEFINE_CLASS(cropdetect);
+AVFILTER_DEFINE_CLASS_EXT(cropdetect_video, "cropdetect_video", cropdetect_options);
static const AVFilterPad avfilter_vf_cropdetect_inputs[] = {
{
@@ -257,6 +478,15 @@ static const AVFilterPad avfilter_vf_cropdetect_inputs[] = {
},
};
+static const AVFilterPad avfilter_vf_cropdetect_video_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_input_video,
+ .filter_frame = filter_frame,
+ },
+};
+
static const AVFilterPad avfilter_vf_cropdetect_outputs[] = {
{
.name = "default",
@@ -275,3 +505,16 @@ const AVFilter ff_vf_cropdetect = {
FILTER_PIXFMTS_ARRAY(pix_fmts),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_METADATA_ONLY,
};
+
+const AVFilter ff_vf_cropdetect_video = {
+ .name = "cropdetect_video",
+ .description = NULL_IF_CONFIG_SMALL("Auto-detect crop size of an embedded video area."),
+ .priv_size = sizeof(CropDetectContext),
+ .priv_class = &cropdetect_video_class,
+ .init = init_video,
+ .uninit = uninit_video,
+ FILTER_INPUTS(avfilter_vf_cropdetect_video_inputs),
+ FILTER_OUTPUTS(avfilter_vf_cropdetect_outputs),
+ FILTER_PIXFMTS_ARRAY(pix_fmts_video),
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_METADATA_ONLY,
+};
diff --git a/tests/fate/filter-video.mak b/tests/fate/filter-video.mak
index faed832cd4..2da4018785 100644
--- a/tests/fate/filter-video.mak
+++ b/tests/fate/filter-video.mak
@@ -647,6 +647,14 @@ FATE_METADATA_FILTER-$(call ALLYES, $(CROPDETECT_DEPS)) += fate-filter-metadata-
fate-filter-metadata-cropdetect: SRC = $(TARGET_SAMPLES)/filter/cropdetect.mp4
fate-filter-metadata-cropdetect: CMD = run $(FILTER_METADATA_COMMAND) "sws_flags=+accurate_rnd+bitexact;movie='$(SRC)',cropdetect=max_outliers=3"
+CROPDETECT_VIDEO_DEPS = LAVFI_INDEV FILE_PROTOCOL MOVIE_FILTER MESTIMATE_FILTER CROPDETECT_VIDEO_FILTER \
+ SCALE_FILTER MOV_DEMUXER H264_DECODER
+FATE_METADATA_FILTER-$(call ALLYES, $(CROPDETECT_VIDEO_DEPS)) += fate-filter-metadata-cropdetect_video1 fate-filter-metadata-cropdetect_video2
+fate-filter-metadata-cropdetect_video1: SRC = $(TARGET_SAMPLES)/filter/cropdetect_video1.mp4
+fate-filter-metadata-cropdetect_video1: CMD = run $(FILTER_METADATA_COMMAND) "sws_flags=+accurate_rnd+bitexact;movie='$(SRC)',mestimate,cropdetect_video,metadata=mode=print"
+fate-filter-metadata-cropdetect_video2: SRC = $(TARGET_SAMPLES)/filter/cropdetect_video2.mp4
+fate-filter-metadata-cropdetect_video2: CMD = run $(FILTER_METADATA_COMMAND) "sws_flags=+accurate_rnd+bitexact;movie='$(SRC)',mestimate,cropdetect_video,metadata=mode=print"
+
FREEZEDETECT_DEPS = LAVFI_INDEV MPTESTSRC_FILTER SCALE_FILTER FREEZEDETECT_FILTER
FATE_METADATA_FILTER-$(call ALLYES, $(FREEZEDETECT_DEPS)) += fate-filter-metadata-freezedetect
fate-filter-metadata-freezedetect: CMD = run $(FILTER_METADATA_COMMAND) "sws_flags=+accurate_rnd+bitexact;mptestsrc=r=25:d=10:m=51,freezedetect"
diff --git a/tests/ref/fate/filter-metadata-cropdetect_video1 b/tests/ref/fate/filter-metadata-cropdetect_video1
new file mode 100644
index 0000000000..892373cc11
--- /dev/null
+++ b/tests/ref/fate/filter-metadata-cropdetect_video1
@@ -0,0 +1,9 @@
+pts=0
+pts=1001
+pts=2002|tag:lavfi.cropdetect.x1=20|tag:lavfi.cropdetect.x2=851|tag:lavfi.cropdetect.y1=311|tag:lavfi.cropdetect.y2=601|tag:lavfi.cropdetect.w=832|tag:lavfi.cropdetect.h=288|tag:lavfi.cropdetect.x=20|tag:lavfi.cropdetect.y=314
+pts=3003|tag:lavfi.cropdetect.x1=20|tag:lavfi.cropdetect.x2=885|tag:lavfi.cropdetect.y1=311|tag:lavfi.cropdetect.y2=621|tag:lavfi.cropdetect.w=864|tag:lavfi.cropdetect.h=304|tag:lavfi.cropdetect.x=22|tag:lavfi.cropdetect.y=316
+pts=4004|tag:lavfi.cropdetect.x1=0|tag:lavfi.cropdetect.x2=885|tag:lavfi.cropdetect.y1=115|tag:lavfi.cropdetect.y2=621|tag:lavfi.cropdetect.w=880|tag:lavfi.cropdetect.h=496|tag:lavfi.cropdetect.x=4|tag:lavfi.cropdetect.y=122
+pts=5005|tag:lavfi.cropdetect.x1=20|tag:lavfi.cropdetect.x2=885|tag:lavfi.cropdetect.y1=311|tag:lavfi.cropdetect.y2=621|tag:lavfi.cropdetect.w=864|tag:lavfi.cropdetect.h=304|tag:lavfi.cropdetect.x=22|tag:lavfi.cropdetect.y=316
+pts=6006|tag:lavfi.cropdetect.x1=0|tag:lavfi.cropdetect.x2=885|tag:lavfi.cropdetect.y1=115|tag:lavfi.cropdetect.y2=621|tag:lavfi.cropdetect.w=880|tag:lavfi.cropdetect.h=496|tag:lavfi.cropdetect.x=4|tag:lavfi.cropdetect.y=122
+pts=7007|tag:lavfi.cropdetect.x1=0|tag:lavfi.cropdetect.x2=885|tag:lavfi.cropdetect.y1=115|tag:lavfi.cropdetect.y2=621|tag:lavfi.cropdetect.w=880|tag:lavfi.cropdetect.h=496|tag:lavfi.cropdetect.x=4|tag:lavfi.cropdetect.y=122
+pts=8008|tag:lavfi.cropdetect.x1=0|tag:lavfi.cropdetect.x2=885|tag:lavfi.cropdetect.y1=115|tag:lavfi.cropdetect.y2=621|tag:lavfi.cropdetect.w=880|tag:lavfi.cropdetect.h=496|tag:lavfi.cropdetect.x=4|tag:lavfi.cropdetect.y=122
diff --git a/tests/ref/fate/filter-metadata-cropdetect_video2 b/tests/ref/fate/filter-metadata-cropdetect_video2
new file mode 100644
index 0000000000..6b433d17cb
--- /dev/null
+++ b/tests/ref/fate/filter-metadata-cropdetect_video2
@@ -0,0 +1,9 @@
+pts=0
+pts=512
+pts=1024|tag:lavfi.cropdetect.x1=21|tag:lavfi.cropdetect.x2=817|tag:lavfi.cropdetect.y1=33|tag:lavfi.cropdetect.y2=465|tag:lavfi.cropdetect.w=784|tag:lavfi.cropdetect.h=432|tag:lavfi.cropdetect.x=28|tag:lavfi.cropdetect.y=34
+pts=1536|tag:lavfi.cropdetect.x1=21|tag:lavfi.cropdetect.x2=817|tag:lavfi.cropdetect.y1=33|tag:lavfi.cropdetect.y2=465|tag:lavfi.cropdetect.w=784|tag:lavfi.cropdetect.h=432|tag:lavfi.cropdetect.x=28|tag:lavfi.cropdetect.y=34
+pts=2048|tag:lavfi.cropdetect.x1=21|tag:lavfi.cropdetect.x2=817|tag:lavfi.cropdetect.y1=29|tag:lavfi.cropdetect.y2=465|tag:lavfi.cropdetect.w=784|tag:lavfi.cropdetect.h=432|tag:lavfi.cropdetect.x=28|tag:lavfi.cropdetect.y=32
+pts=2560|tag:lavfi.cropdetect.x1=21|tag:lavfi.cropdetect.x2=817|tag:lavfi.cropdetect.y1=29|tag:lavfi.cropdetect.y2=465|tag:lavfi.cropdetect.w=784|tag:lavfi.cropdetect.h=432|tag:lavfi.cropdetect.x=28|tag:lavfi.cropdetect.y=32
+pts=3072|tag:lavfi.cropdetect.x1=21|tag:lavfi.cropdetect.x2=817|tag:lavfi.cropdetect.y1=29|tag:lavfi.cropdetect.y2=465|tag:lavfi.cropdetect.w=784|tag:lavfi.cropdetect.h=432|tag:lavfi.cropdetect.x=28|tag:lavfi.cropdetect.y=32
+pts=3584|tag:lavfi.cropdetect.x1=21|tag:lavfi.cropdetect.x2=817|tag:lavfi.cropdetect.y1=29|tag:lavfi.cropdetect.y2=465|tag:lavfi.cropdetect.w=784|tag:lavfi.cropdetect.h=432|tag:lavfi.cropdetect.x=28|tag:lavfi.cropdetect.y=32
+pts=4096|tag:lavfi.cropdetect.x1=21|tag:lavfi.cropdetect.x2=817|tag:lavfi.cropdetect.y1=29|tag:lavfi.cropdetect.y2=465|tag:lavfi.cropdetect.w=784|tag:lavfi.cropdetect.h=432|tag:lavfi.cropdetect.x=28|tag:lavfi.cropdetect.y=32
--
2.20.1 (Apple Git-117)
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