I'm rebroadcasting a realplayer stream and there are two problems. The icecast2 sounds tinny and its delayed something like 3secs. Any advice to perhaps use speex as it's talk radio? Can I cut the delay? Here is my ices2 config: http://static.natalian.org/2006-06-21/ices-alsa.xml Here is details of the feed, so you can take a listen: http://natalian.org/archives/2006/06/15/bbc-radio-5-live/ Best wishes,
Kai Hendry wrote:> I'm rebroadcasting a realplayer stream and there are two problems. > > The icecast2 sounds tinny and its delayed something like 3secs.a few things to resolve You capture at 48000 but resample from 44100, that will cause problems. You resample to 22050 so that will affect quality, you haven't said what bitrate you want to target for, so resampling/downmixing may be required anyway.> Any advice to perhaps use speex as it's talk radio? > > Can I cut the delay?A few secs delay is generally not a problem, but if you want to reduce it then reduce the burst-size (eg 0) in icecast and also reduce the pre-buffering in the player. karl.
Kai Hendry schrieb:> The icecast2 sounds tinny and its delayed something like 3secs.You probably refer to ices2> Any advice to perhaps use speex as it's talk radio?reencoding from one lossy format to another lossy format can introduce severe loss of quality. You'll have to experiment with all the parameters available in ogg/vorbis (sampling rate, quality, stereo/mono,...) and maybe try other codecs too. I don't know if there is broad player support for speex.> Can I cut the delay?reduce the buffer size in the real audio client.
On 2006-06-21T15:21+0100 Karl Heyes wrote:> You capture at 48000 but resample from 44100, that will cause problems. > You resample to 22050 so that will affect quality, you haven't said what > bitrate you want to target for, so resampling/downmixing may be required > anyway.I am unsure about these settings. Any particular suggestions? I don't quality with voice, just clarity.> >Can I cut the delay? > A few secs delay is generally not a problem, but if you want to reduce > it then reduce the burst-size (eg 0) in icecast and also reduce the > pre-buffering in the player.Sorry it isn't 3secs. It's closer to 3minutes. And yes I'm using ices2.
On Wed, 21 Jun 2006, Kai Hendry wrote:> I'm rebroadcasting a realplayer stream and there are two problems.Well, apart from the BBC *will* come down on you like a ton of bricks - especially now you've drawn attention to yourself - you would be better off doing this by getting hold of a DAB or DTT/satellite layer 2 stream and relaying that. The radio 5 DAB stream is mp2 80Kbps/48KHz. The radio 5 extra DAB stream is mp2 64Kbps/48KHz. DTT streams are higher.
On 2006-06-21T17:49+0100 gARetH baBB wrote:> off doing this by getting hold of a DAB or DTT/satellite layer 2 stream > and relaying that. > The radio 5 DAB stream is mp2 80Kbps/48KHz. > The radio 5 extra DAB stream is mp2 64Kbps/48KHz.Can you get a BBC Radio 5 DAB stream in South Korea I wonder? One that has live World cup coverage? Best wishes,