[pulseaudio-discuss] Receiving RTP streams with pulseaudio

[Michael Trunner]

thanks for that informations, i will try it Today. But it Looks like that i can fix my Problem now.



Am 18.05.2011 um 08:37 schrieb Rémi Denis-Courmont <remi at remlab.net>:

> On Tue, 17 May 2011 21:51:35 +0200, Michael Trunner <michael at trunner.de>
> wrote:
>> I'm trying to setup Pulseaudio to receive RTP/Multicast steams. Sender
>> should be vlc, (and receiver should be pulseaudio). I activated
>> module-rtp-recv (and module-rtp-send) with papref, but I can't get it
>> work. Can some one explain me what I have to do? Or how to debug it.
> 
> First you need to make sure that VLC uses an RTP payload format that
> PulseAudio understands, typically L16/44100/2 (signed big endian 16-bits
> stereo at 44100 Hz). By default, VLC will not decode the audio. Also make
> sure SAP is enabled.
> 
> For example:
> # IP=224.0.0.42
> # vlc --sout-keep --no-sout-video --no-sout-spu \
>      --sout
> "#transcode{acodec=s16b,samplerate=44100}:gather:rtp{sap,dst=$IP}"
> 
> Then you need to configure PulseAudio to use the standard SAP address as
> specified in IETF RFC2974 §3, corresponding to the multicast scope that VLC
> is configured to use, in particular:
> - 224.2.127.254 (SAP.MCAST.NET) for global IPv4,
> - ff0e::2:7ffe for global IPv6,
> - 224.0.0.255 for link-local IPv4,
> - ff02::2:7ffe for link-local IPv6.
> 
> By default, PulseAudio uses a proprietary non-standard SAP group, namely
> 224.0.0.56. This cannot interoperate with VLC.
> 
> -- 
> Rémi Denis-Courmont
> http://www.remlab.net/
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