How to remove an audio track from an mp4 video file?

Question

I have an mp4 video file with multiple audio tracks. I would like to strip away the rest of the tracks and keep just one. How do I do this?

Answer 1

First run ffmpeg -i file.mp4 to see which streams exists in your file. You should see something like this:

Stream #0.0: Video: mpeg4, yuv420p, 720x304 [PAR 1:1 DAR 45:19], 23.98 tbr, 23.98 tbn, 23.98 tbc
Stream #0.1: Audio: ac3, 48000 Hz, 5.1, s16, 384 kb/s
Stream #0.2: Audio: ac3, 48000 Hz, 5.1, s16, 384 kb/s

Then run ffmpeg -map 0:0 -map 0:2 -acodec copy -vcodec copy -i file.mp4 new_file.mp4 to copy video stream and 2nd audio stream to new_file.mp4.

Answer 2

Related issue—removing all audio tracks from an mp4 file can be done thus:

ffmpeg -i input_file.mp4 -vcodec copy -an output_file.mp4

Answer 3

You could try avidemux which handles only one audio file internally (and therefore forces you to select one specific track). I've never tried it with .mp4 but it works with other formats.

Answer 4

FFMPEG might be a helpful solution for you.

$ man ffmpeg

Answer 5

http://howto-pages.org/ffmpeg/#strip

please see the example.