1.....................
demux the video sound with ffmpeg first.
code:
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$ ffmpeg -i source-video.avi -vn -acodec copy sound2.mp3 |
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use cinellera to do your edits.
then use mplayer to mux every thing back to gather again.
mencoder:
$ mencoder source-video.avi -ovc copy -soundfile sound2.mp3 -o remuxed-output.avi |
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