[FFmpeg-trac] #9459(avfilter:new): w3fdif inserting extraneous frame (at beginning?) when selective deinterlacing all-progressive input

FFmpeg trac at avcodec.org
Mon Oct 18 02:59:16 EEST 2021


#9459: w3fdif inserting extraneous frame (at beginning?) when selective
deinterlacing all-progressive input
----------------------------------+--------------------------------------
             Reporter:  Tim       |                     Type:  defect
               Status:  new       |                 Priority:  normal
            Component:  avfilter  |                  Version:  git-master
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
----------------------------------+--------------------------------------
 ffmpeg -i sample.mkv -vcodec prores -vf yadif=deint=interlaced -y
 yadif.mkv
 {{{
 frame=   34 fps=0.0 q=-0.0 Lsize=     144kB time=00:00:01.38 bitrate=
 850.5kbits/s speed=31.6x
 }}}

 ffmpeg -i sample.mkv -vcodec prores -vf w3fdif=deint=interlaced -y
 w3fdif.mkv
 {{{
 frame=   35 fps=0.0 q=-0.0 Lsize=     148kB time=00:00:01.38 bitrate=
 875.4kbits/s speed=33.3x
 }}}

 mkvinfo -v w3fdif.mkv | grep timestamp
 {{{
 | + Cluster timestamp: 00:00:00.000000000
 | + Simple block: key, track number 1, 1 frame(s), timestamp
 00:00:00.000000000
 | + Cluster timestamp: 00:00:00.017000000
 | + Simple block: key, track number 1, 1 frame(s), timestamp
 00:00:00.017000000 <-- extra frame here???
 | + Cluster timestamp: 00:00:00.050000000
 | + Simple block: key, track number 1, 1 frame(s), timestamp
 00:00:00.050000000
 }}}

 mkvinfo -v yadif.mkv | grep timestamp
 {{{
 | + Cluster timestamp: 00:00:00.000000000
 | + Simple block: key, track number 1, 1 frame(s), timestamp
 00:00:00.000000000
 | + Cluster timestamp: 00:00:00.050000000
 | + Simple block: key, track number 1, 1 frame(s), timestamp
 00:00:00.050000000
 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9459>
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