[SOLVED] Play 16 kHz PCM stream over rtp

[tik0]

Hey fellows,

I simply try to play back an 16 kHz PCM stream over rtp, but every time I get the following error message:

SDP required:
A description in SDP format ....... dynamic payload format (127)

The source stream is from a Barix PS1 (http://www.barix.com/).
I have no clue where to get the SDP information from. With the mplayer it works, but I need to get it running with the vlc.

Thanks in advance,
Tik0

[Rémi Denis-Courmont]

We know where to get the SDP from VLC. From something else, you need to ask from the vendor.

Alternatively, write the SDP by hand; VLC can read the SDP from a local file.

[tik0]

Hi again,

I wrote the following sdp-file:

Code: Select all

c=IN IP4 192.168.2.61 m=audio 3061 RTP/AVP 127 a=rtpmap:127 s16l/16000/2

but when I open this, vlc pops up, but nothin is played.
I can defenetly say, that the PC recieves the stream, because when I use mplayer with the following command, the playback works:

Code: Select all

mplayer.exe -demuxer rawaudio -rawaudio channels=1:rate=16000:format=0x20776172 rtp://192.168.2.61:3061

[tik0]

Hey guys,

i've found the solution.

Setup:
One Source which is streaming "linear PCA/mono/16bit/16kHz" with the payload identifier "127" over broadcast (192.168.2.255:3061) into my network.
On the other hand i have a laptop wich needs to recieve this stream and play it.
So for that I wrote a sdp-file and just opened it with vlc-player:

Code: Select all

c=IN IP4 192.168.2.255 m=audio 3061 RTP/AVP 127 a=rtpmap:127 L16/16000

PS: You get all the information regarding the sdp-file standart from the following file: http://www.ietf.org/rfc/rfc2327.txt

Greetz Tik0