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  1. I want to mux an MP4 sound track into an MP4 aquarium screen capture.
    The screen capture is 1:30 while the sound track is 6:00, so I only need the first 1:30 of the sound track.
    What is the easiest way to do this?
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  2. Member Cornucopia's Avatar
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    Edit it.

    Seriously, demux (mp4muxer or similar) both V & A streams, then use mp3cut to chop to just the first 1:30 of the audio - losslessly, then remux the result with the raw video stream.

    Should take no longer than it took to write this.

    Scott
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  3. Member Cornucopia's Avatar
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    You'll want to get the time exact, down to the video frame (prob. converted to milliseconds for audio), though, so you get a clean A+V match.

    Scott
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  4. Use ffmpeg's -shortest switch. The longer track will be truncated.
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  5. Member Cornucopia's Avatar
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    yeah, that's even quicker
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