How to choose specific audio tracks

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Ivon
Posts: 2
Joined: Wed May 13, 2020 3:33 pm

How to choose specific audio tracks

Post 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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Woodstock
Veteran User
Posts: 3762
Joined: Tue Aug 27, 2013 6:39 am

Re: How to choose specific audio tracks

Post by Woodstock »

You can't with handbrake.
Ivon
Posts: 2
Joined: Wed May 13, 2020 3:33 pm

Re: How to choose specific audio tracks

Post by Ivon »

oh! thanks.
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BradleyS
Moderator
Posts: 1859
Joined: Thu Aug 09, 2007 12:16 pm

Re: How to choose specific audio tracks

Post 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).
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