[FFmpeg-user] Can I use ffmpeg to combine audio streams in .ts file?

[Lou]

On Tue, 30 Sep 2014 18:35:53 +0200
skyscanner at gmx.ca wrote:

> On Tue, 30 Sep 2014 16:13:20 +0200, barsnick at gmx.net wrote:
>  
> > See my other response from a few minutes ago:
> > Something like
> > pan=5.1:FL=c0+c4:FR=c1+c5:BL=c4:BR=c5:FC=c7
> > or whatever you think is correct. You may have to throw in some factors
> > such as "0.5*". :-)
> 
> Following up on that, this seems to be the answer:
> 
> ffmpeg -i "original program.ts" -c:v copy -filter_complex '[0:1][0:2][0:3][0:4]amerge=inputs=4,pan=5.1:FL=c0:FR=c1:FC=c2:BL=c4:BR=c5:LFE=c3' -c:a mp2 test.ts

In pan:

  "If the ‘=’ in a channel specification is replaced by ‘<’, then the
   gains for that specification will be renormalized so that the total
   is 1, thus avoiding clipping noise."
   http://ffmpeg.org/ffmpeg-filters.html#pan

Which is something you may or may not want, but I thought it was worth
mentioning.