[FFmpeg-user] Transport Stream (.ts) with ac3 audio

Carl Eugen Hoyos cehoyos at ag.or.at
Thu Feb 6 14:47:20 CET 2014

Andy Furniss <adf.lists <at> gmail.com> writes:

> > That said, there is a ticket (unreachable atm) which describes the
> > same problem, since no developer can repropuce this and afaik WMP
> > plays the files that FFmpeg writes, I don't think this has any
> > priority;-(
> Obviously I haven't seen the trac


> but it seems to me that ffmpeg is making an ATSC 
> compliant stream when muxing AC3, so whether it's

Afaik, this is correct.

> reproducable by developers or not it is known not 
> to be a DVB compliant stream.

I was just trying to explain that problems that are not 
easily reproducible (and, worse, not reproducible with 
software alone) are less likely to be fixed than issues 
that are easily (and with all relevant players) 

> I am referring to stream type 129 vs 6, (and any other 
> differences in the spec/stream which I haven't looked 
> into).
> The spec being A52 Annex A (p114)
> http://www.atsc.org/cms/standards/A52-2012(12-17).pdf

Implementation for "System B" (page 121) is missing 
for the muxer iiuc.

Patch definitely welcome!

Carl Eugen

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