Icecast Streaming Media Server

[Downz]

I would like to know if it's possible to transmit to a mount at 64kbps mono (mp3) and automatically convert it to a second mont, transmiting at 24kbps

[Anonymous]

not possible with icecast alone.

1. you can broadcast two separate bitrates from your source client (not feasible for some folks with a low bandwidth source)

or

2. use stream transcoder:

you will need to look into using streamtranscoder (www.oddsock.org) to listen to the first stream, transcode it (to a lower bitrate), then re-broadcast it to another mountpoint or server
be warned that getting this up and running can be somewhat complex.

I am running a poll on "should icecast have stream transcoding capabilities built-in?" over in the Feature Request forum. I'd recommend voting on it.

Some are opposed to putting it in, although I'm not sure why, and nobody can seem to give me a good reasoning for this position.

however, as karl points out, there is some hope that icecast 2.3 might have script start/stop triggers that would control streamtranscoder more elegantly (which would eliminate the need for built-in functionality)

[karlH]

[Anonymous]

not to beat a dead horse...
looks like ffmpeg can handle streaming from/to stdin/stdout, and handle several different formats...

nice article in Linux Journal about it (although in the context of video stream format conversion)..

The idea should be the same.. take a high bitrate mp3/ogg and transcode and stream a second lower bitrate mp3/ogg stream back to itself on another mountpoint designated for the lower bitrate stream....

maybe some adventureous code warriors can revisit this?? !


CHALLENGE:

I'll donate $25 to xiph.org if somebody can come up with a nice working solution with the stream start/stop events and a transcoder, etc..

[/b]