[FFmpeg-user] How can I convert mpeg2 5.1 audio to ac3?

Carl Eugen Hoyos cehoyos at ag.or.at
Sun Nov 9 14:15:58 CET 2014

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

> Carl Eugen Hoyos wrote:

This is missing the following:

> > > Don't worry about MPEG-2 Multichannel, your sample
> > > is certainly Dolby PLII.

> > I severely doubt that it was formalized for DVB.

(it == MPEG-2 Multichannel)

> > You can check the bitrate to be sure: I would expect
> > that 256k are not enough for Multichannel.

Yes, MPEG-2 Multichannel was probably never formalized 
for DVB, Dolby PLII certainly was.

And it is apparently possibly to detect it;-)
(I did not yet test if the flag is really set 

Carl Eugen

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