On Tue, Jan 13, 2009 at 11:17 AM, Romain Beauxis <[email protected]> wrote: > Le Sunday 11 January 2009 14:59:58 Oliver Oli, vous avez écrit : >> > You may already know, but you can run more than one instance of >> > liquidsoap and each can have it's own .low script. >> >> I mean support for multichannel audio. I want to to encode a 4-channel >> (quadrophonic / surround) Ogg/Vorbis stream with liquidsoap. Does >> anyone know some other piece of software that encodes multi-channel >> streams as an intermediate solution? > > Just to make my previous answer more clear: current code might support > multichannel. However, it should be tested. Since we don't have multichannel > input files, I don't really know about it.
I don't see an option to set 4 channels output.icecast.vorbis. Only stereo=true|false My setup is very simple: I have a 4 channel jack input and want to stream it as 4 channel vorbis (and/or aac) to icecast. > Does Ogg/Vorbis support multichannel ? I know that it is not the case for mp3 > audio but I am not sure. MP3 supports only two channels, but there is MP3 Surround which uses "Binaural Cue Coding" for enhancing the stereo signal with surround information. But I'm not aware of any open source MP3 codec that supports it. Vorbis supports up to 255 channels. As the recent spec supports only one static channel mapping scheme, it should be quite easy to add multi channel support for the Vorbis encoder (vorbis mapping: 1 channel = mono, 2 = stereo, 3 = LCR/3.0, 4 = quadrophoninc, 5 = 5.0, 6 = 5.1). We have to keep in mind that there are different channel mappings for 5.1 surround. So we would need a multichannel swap function or some automatic remapping. I haven't looked into aac's channel mapping, but at least Vorbis doesn't use the common consumer formats channel mapping. If it helps I can try to figure that out and write a short summary. But for now I don't need more than a simple 4 channel Vorbis encoder for my project. Even that is not very important, I'm quite happy with liquidsoap in stereo mode. ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Savonet-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/savonet-users
