#4785: Decimate filter doesn't work when used directly with fieldmatch
-------------------------------------+-------------------------------------
Reporter: Detergent | Type: defect
Status: new | Priority: normal
Component: avfilter | Version: 2.7
Keywords: fieldmatch, | Blocked By:
decimate, ivtc | Reproduced by developer: 0
Blocking: |
Analyzed by developer: 0 |
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Hello,
For a lot of telecined inputs, using '-vf fieldmatch,decimate' will not
work and the result will have too many dropped frames that will result in
accelerated playback (leading to audio desync).
Now, the weird part is the following. This will not work :
{{{
ffmpeg -i input.1080i.ts -vf fieldmatch,decimate -vcodec libx264 out.mkv
}}}
'''However''', this command will work flawlessly :
{{{
ffmpeg -i input.1080i.ts -vf fieldmatch -f yuv4mpegpipe - | ffmpeg -i -
-vf decimate -vcodec libx264 out.mkv
}}}
You can download a telecined sample that will reproduce the problem using
the above commands here :
https://drive.google.com/file/d/0Bz_fz7x43dCZT2tvZi1kZXJ0TUk/view?usp=sharing
I am using FFmpeg 2.7.2 and used MPC-HC 1.7.9 to play the outputs.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/4785>
FFmpeg <https://ffmpeg.org>
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