Muxing MP4

[nicksteel]

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?

[Cornucopia]

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

[nicksteel]

Thanks!

[Cornucopia]

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

[jagabo]

Use ffmpeg's -shortest switch. The longer track will be truncated.

[Cornucopia]

yeah, that's even quicker