Audio multitrack render

[Russ Foster]

If you want a video with multi audio streams, like some videos do with 
an option to listen in English, Spanish, French, etc. then you 
definitely need to make it a mkv container.

You should be able to do this with ffmpeg, which works with mkv H.265 
and allows you to address multiple audio streams within a container.

This document has some helpful references on addressing multiple audio 
streams: https://trac.ffmpeg.org/wiki/Map

And in this thread, this guy answers his own question on modifying 
multiple audio channels within a mkv container. But it gives some 
insight into how the command works when addresses multiple audio 
streams:

https://stackoverflow.com/questions/60021165/ffmpeg-map-mkv-with-multiple-audio-to-mkv-with-more-audio

Hope this helps.

-r



On 2023-01-18 08:08, Narcis Garcia wrote:
> Okay, I'll try mkvextract if it's useful to merge all tracks into a
> single .avi file.
> 
> Thank you.
> 
> 
> El 18/1/23 a les 14:22, Evert Vorster ha escrit:
>> Hi there, Narcis.
>> 
>> If you are on Linux, MKVtoolnix might be able to help you, as it can 
>> mux in extra channels.
>> 
>> Kind regards,
>> Evert Vorster
>> 
>> Awesome Chapters Tours
>> http://www.awesomechapters.com <http://www.awesomechapters.com>
>> Tel: +264 (0) 811477690
>> 
>> 
>> 
>> On Wed, 18 Jan 2023 at 14:26, Narcis Garcia <debianlists at actiu.net 
>> <mailto:debianlists at actiu.net>> wrote:
>> 
>>     Thank you Paul;
>> 
>>     I don't mean channels (stereo, etc.) but resulting tracks.
>>     Example: One track for music (stereo), the other for comments 
>> speech
>>     (mono).
>> 
>> 
>>     El 18/1/23 a les 13:21, Paul Brown ha escrit:
>>      > On Wednesday, 18 January 2023 10:52:56 CET john Lucibello 
>> wrote:
>>      >> You are speaking to the wrong person as I'm not
>>      >> IT INTELLIGENT.
>>      >
>>      > John,
>>      >
>>      > Please do not respond to requests for support that you cannot
>>     answer, as it is
>>      > not helpful. Allow others who can provide helpful information 
>> to
>>     do their
>>      > thing.
>>      >
>>      > Thanks.
>>      >
>>      > ---
>>      >
>>      > Narcís,
>>      >
>>      > Our apologies. This is a public forum, which means anyone can
>>     respond.
>>      >
>>      > To answer your question (I think), if you are recording in
>>     stereo, which will
>>      > usually be the default, the channels will be kind of separate. 
>> To
>>     see them in
>>      > Kdenlive, right click on a stereo audio track header, and click
>>     on the
>>      > "Separate Channels" check box.
>>      >
>>      > See attached image.
>>      >
>>      > Cheers
>>      >
>>      > Paul
>> 
>>     --     Narcis Garcia
>> 
>>     __________
>>     I'm using this dedicated address because personal addresses aren't
>>     masked enough at this mail public archive. Public archive 
>> administrator
>>     should fix this against automated addresses collectors.
>>