[FFmpeg-devel] [PATCH] lavfi/vf_fieldmatch: keep fields as-is if not matched properly

[mail at nodoa.me]

This is reproducible using for example
https://samples.ffmpeg.org/MPEG2/interlaced/burosch1.mpg

ffmpeg -i burosch1.mpg -map 0:v -c:v libx264 -vf
fieldmatch=combmatch=full,yadif=mode=1:deint=interlaced -preset veryfast
-crf 10 burosch1.mp4

The end result will be in 50p and without the patch randomly have the frames
in the wrong order.