Logic for handling single frame in yadif (
0f9f24c9), caused deint=1 (e.g., yadif=0:-1:1) to output extra duplicate leading frame:
ffmpeg -i fate-suite/ffmpeg-synthetic/vsynth1/%02d.pgm -vf yadif=0:-1:1,showinfo -f null -y /dev/null
[Parsed_showinfo_1 @ 0x1d967d0] n:0 pts:0 pts_time:0 pos:-1 fmt:gray sar:0/1 s:352x432 i:P iskey:1 type:I checksum:
E457EEA0 plane_checksum:[
E457EEA0] mean:[126] stdev:[46.6]
[Parsed_showinfo_1 @ 0x1d967d0] n:1 pts:0 pts_time:0 pos:-1 fmt:gray sar:0/1 s:352x432 i:P iskey:1 type:I checksum:
E457EEA0 plane_checksum:[
E457EEA0] mean:[126] stdev:[46.6]
(Outputs 51 frames)
After patch, vf "yadif=0:-1:1" behaves correctly (like "yadif=0:-1:0") and outputs 50 frames, first two:
[Parsed_showinfo_1 @ 0x1e307d0] n:0 pts:0 pts_time:0 pos:-1 fmt:gray sar:0/1 s:352x432 i:P iskey:1 type:I checksum:
68E8D1EB plane_checksum:[
68E8D1EB] mean:[126] stdev:[46.0]
[Parsed_showinfo_1 @ 0x1e307d0] n:1 pts:2 pts_time:0.04 pos:-1 fmt:gray sar:0/1 s:352x432 i:P iskey:1 type:I checksum:
4E674BC7 plane_checksum:[
4E674BC7] mean:[125] stdev:[46.0]
(Outputs 50 frames)
Signed-off-by: Neil Birkbeck <neil.birkbeck@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
return -1;
}
+ if (!yadif->prev)
+ return 0;
+
if ((yadif->deint && !yadif->cur->interlaced_frame) || ctx->is_disabled) {
yadif->out = av_frame_clone(yadif->cur);
if (!yadif->out)
return ff_filter_frame(ctx->outputs[0], yadif->out);
}
- if (!yadif->prev)
- return 0;
-
yadif->out = ff_get_video_buffer(ctx->outputs[0], link->w, link->h);
if (!yadif->out)
return AVERROR(ENOMEM);