[FFmpeg-user] How to copy all of 5 audio streams to mp4 file

[Moritz Barsnick]

On Fri, Feb 22, 2019 at 10:22:05 -0800, Hans Carlson wrote:
> You might want to take a look at vgtmpeg:
>    http://godromo.com/gmt/vgtmpeg

Interesting stuff. The author should have at least tried to contribute
his changes to ffmpeg though. (And not claim authorship, where all he
provided was a small changeset.)

> If I remember correctly, it can identify the language for
> audio/subtitle streams by reading the .IFO files.

It seems it's an open issue regarding subtitles:
https://github.com/vigata/vgtmpeg/issues/3

> I haven't looked at it in quite a while because it was always out-of-date 
> with respect the ffmpeg source.  It appears it's been updated to the 4.0 
> branch now, but that was last year, so it's still quite out-of-date.

It's almost dead-easy extracting a changeset from those sources and
applying it on top of ffmpeg master HEAD. I haven't tried compiing yet
though. Since it's open source, I could just as well provide that
patchset as a fork/branch on Github. ;-)

Cheers,
Moritz