Weblog entry #55 for ajt

De-Streaming RealAudio
Posted by ajt on Mon 16 Oct 2006 at 13:56

This weekend I had a go at de-streaming RealAudio feeds, so I could listen to BBC Radio 7 comedy at times more convenient to me. It's been a minor triumph, and it has more than made up for breaking the nvidia driver on a Sarge box.

  • Use vsound on x86 systems with OSS sound, and "listen" with RealPlayer, vsound generating a wave file.
  • Use mplayer or xine to dump the stream to a RealPlayer .ra file. At the moment mplayer dumps a core at the end, but it seems to work otherwise. I've yet to try xine.
  • Use mplayer to stream the live feed or .ra file to a wave file. This works very well, though the wave files are a little large.
  • The feeds are often quite sloppy with a lot of overrun at each end, so audacity is pretty good at trimming wave files.
  • Finally I've been using oggenc to compress the wave file to a more compact and still useful ogg vorbis file.

I'm running Etch on AMD64, so it's a pain to use RealPlayer (it does work in the chroot). Using mplayer is a big plus as it's all AMD64 native, and very-very fast when doing stuff, it converts ra to wave in seconds. I've got www.debian-multimedia.org in my apt.sources so I can get all the multimedia stuff.

Google and my LUG are useful resources to have!

 

Comments on this Entry

Posted by Anonymous (81.178.xx.xx) on Tue 17 Oct 2006 at 02:04
There's some kind of "witty joke" in mplayer that makes it say it's dumping core if you use -dump{stream,audio,video}. It's not really dumping core. Note the smiley.

Yes, mplayer developers are retarded.

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Posted by ajt (204.193.xx.xx) on Tue 17 Oct 2006 at 09:18
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Ah, yes, I see the "humour". I'd not paid much attention, and just assumed it was buggy multimedia stuff.

--
"It's Not Magic, It's Work"
Adam

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