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What is the difference between using -vcodec copy and -sameq with ffmpeg? Do they do the same thing?

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-sameq does not force you to use the same video codec. You can, for instance, convert H.264 to DivX while using -sameq.

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If a video codec isn't specified then what's the difference? – OSX NINJA Dec 30 '10 at 21:35
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If a video codec isn't specified, I think ffmpeg has default audio/video codecs for a given container. My ffmpeg on OS X defaults to mpeg4 yuv420p for video for MP4 and AVI, with libfaac and mp2 audio codecs, respectively. That is, if I chose an H.264 file and chose -vcodec copy, it selects libx264 for video. If instead I chose -sameq, it selects generic mpeg4. – fideli Dec 31 '10 at 2:48
Which is better to use if a video codec isn't specified? – OSX NINJA Dec 31 '10 at 19:38
Jedi, I don't understand your question above. Select the codec you want, in this case one your player supports. – CarlF Jan 1 '11 at 1:24
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