[FFmpeg-user] Syntax request for -vf to copy /pass through video stream

[Stefano Sabatini]

On date Thursday 2013-10-31 12:20:26 -0500, David Favor wrote:
[...]
> + ffmpeg -y -i broken.mp4 -c:a copy -vf copy -vf setdar=dar=0 -vf setsar=sar=0 -t 10 vfcopy.mp4

This command is broken in several ways, first you can't copy and
filter at the same time, and multiple -vf a -vf b -vf c have the
effect of the last -vf command (in this case -vf c).

Please understand the meaning of the syntax and that you *CAN'T* copy
a stream and filter it at the same time.
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