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How to choose specific audio tracks

Posted: Wed May 13, 2020 4:02 pm
by Ivon
Description of problem or question:
I would like to encode mxf or .mov) multichanel audio tracks with 5.1 AND downmix Left/Right on tracks 7 and 8
to make a Stereo mp4 for Vimeo (for exemple) But Handbrake detect only one pcm track 7.1!! (but it's not!)
How can chose ONLY audio channel 7 and 8 for making a stereo mp4?



Steps to reproduce the problem (If Applicable):




HandBrake version (e.g., 1.0.0):
1.3.2 pc



Operating system and version (e.g., Ubuntu 16.04 LTS, macOS 10.13 High Sierra, Windows 10 Creators Update):
Windows 10 Pro



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Re: How to choose specific audio tracks

Posted: Wed May 13, 2020 4:49 pm
by Woodstock
You can't with handbrake.

Re: How to choose specific audio tracks

Posted: Wed May 13, 2020 4:52 pm
by Ivon
oh! thanks.

Re: How to choose specific audio tracks

Posted: Thu May 14, 2020 6:46 am
by BradleyS
IIRC the problem is the MXF has 8 individual mono tracks/channels and no way to identify the mapping.

You can probably manually specify the mapping using a command line tool like FFmpeg but it will be cumbersome to do.

If possible, rendering a stereo only version is probably easiest. You might also try remuxing using MKVToolNix, which might allow you to drop channels (not entirely sure).