[FFmpeg-user] Pad filter seems to have no effect

Nicolas George nicolas.george at normalesup.org
Tue Aug 23 16:32:08 CEST 2011

Le sextidi 6 fructidor, an CCXIX, David Favor a écrit :
>    ffmpeg -y -i test.skype.mov -an -vf pad=1280:480:640:0:white -map 0.2 -vcodec copy test.video.mov

Obviously, you can only apply video filters to the decoded video, but your
command tells ffmpeg not to decode the video.

It may be theoretically possible to add borders without reencoding, provided
the size of the borders is a multiple of the block size of the codec, but
ffmpeg does not have any feature of the sort, and will probably never have.


  Nicolas George
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