OT: mp3 -> ac3 -> SP/DIF output?

Les Mikesell lesmikesell at gmail.com
Tue Dec 16 02:52:02 UTC 2008

Tom Horsley wrote:
>> Is there a media player that can do
>> something like use the ffmpeg libraries to do the ac3 encoding
>> on the fly and send the digital stream to my SP/DIF output?
> Answering my own question, I'm currently listening to music
> on my surround system being played via:
> mplayer -ao alsa:device=hw=0.0 -af lavcac3enc=tospdif <filename>
> Only have to sort through the 47,621,337 possible command line option
> combinations to figure it all out :-). (Actually I reused the alsa device
> option from the DVD ac3 passthrough magic I found previously on the web).
> I guess on the fly audio encoding isn't very demanding, my CPUs
> are both hovering around 1 to 2% usage.

If you only have 2 channels, is there some reason to encode as ac3 
instead of pcm?

   Les Mikesell
    lesmikesell at gmail.com

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