OT: mp3 -> ac3 -> SP/DIF output?
I've seen talk of an alsa ffmpeg plugin that can convert simple stero sound to an ac3 stream for output to a sound system via SP/DIF output of a soundcard. (But I get the impression I'd have to rebuild alsa and alsa kernel modules from scratch to support it). I have successfully played DVDs with the raw digital audio stream sent directly to the SP/DIF output, so I know if the right stuff gets sent, I can do digital output to my receiver. What I'm wondering is: 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? Something stand-alone where I don't need to rebuild the whole sound system from source (I might as well switch to gentoo if I wanted to do that :-). -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: OT: mp3 -> ac3 -> SP/DIF output?
> 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 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. -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: OT: mp3 -> ac3 -> SP/DIF output?
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 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 lesmikes...@gmail.com -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: OT: mp3 -> ac3 -> SP/DIF output?
On Mon, 15 Dec 2008 20:52:02 -0600 Les Mikesell wrote: > If you only have 2 channels, is there some reason to encode as ac3 > instead of pcm? Probably not, I just knew ac3 output worked from the DVDs, and it isn't like ac3 encoding is putting any kind of strain on the system :-). -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: OT: mp3 -> ac3 -> SP/DIF output?
Tom Horsley wrote: > Probably not, I just knew ac3 output worked from the DVDs, and it > isn't like ac3 encoding is putting any kind of strain on the > system :-). But you're losing quality. Kevin Kofler -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
