[FFmpeg-cvslog] avfilter/vf_yadif: fix extra leading dup frame when deint=1
Neil Birkbeck
git at videolan.org
Sun Nov 30 00:01:45 CET 2014
ffmpeg | branch: master | Neil Birkbeck <neil.birkbeck at gmail.com> | Sat Nov 29 12:23:58 2014 -0800| [e4788e9cd9878a51b7780fa3e2d070288a2918b9] | committer: Michael Niedermayer
avfilter/vf_yadif: fix extra leading dup frame when deint=1
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 at gmail.com>
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e4788e9cd9878a51b7780fa3e2d070288a2918b9
---
libavfilter/vf_yadif.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/libavfilter/vf_yadif.c b/libavfilter/vf_yadif.c
index 70670c3..da6ee70 100644
--- a/libavfilter/vf_yadif.c
+++ b/libavfilter/vf_yadif.c
@@ -342,6 +342,9 @@ static int filter_frame(AVFilterLink *link, AVFrame *frame)
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)
@@ -353,9 +356,6 @@ static int filter_frame(AVFilterLink *link, AVFrame *frame)
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);
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