[FFmpeg-user] AC-3 Dolby Digital 5.1 Encoding

Carl Eugen Hoyos cehoyos at ag.or.at
Fri May 25 08:09:23 CEST 2012

Chase Patterson <chapatt <at> gmail.com> writes:

>     Stream #0:0: Audio: ac3, 48000 Hz, 5.1(side), flt, 640 kb/s

> That leads me to believe that it's using a channel layout of "5.1(side)"

Please compare with a random 5.1 Dolby stream from DVB or DVD, 
it should be identical.

> (maybe assuming the surround speakers are on the sides, rather than behind,
> as I want). 

> Also, it automatically sets the sample format to "flt". Is this
> what I want, or how can I change it?

It feeds "flt" into the encoder that outputs "Dolby".
There is also a (slower) Dolby encoder that uses "s16" as input, 
but it has no advantage.

Carl Eugen

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