Streaming G.711 u-law

[vortech306]

Hello,

I have the need to be able to transcode an audio file and then stream it via G.711 u-law. Searching these forums I found a post stating that starting from version 0.9.0 VLC can stream G.711 over RTP, however I'm unable to determine the correct sequence of commands to do so.

I've downloaded and installed VLC, version vlc-0.9.0-git-20080425-0003-win32.exe, and have tried the following from Windows XP command line:

vlc -vvv test.wav --sout "#transcode{acodec=ulaw,samplerate=8000,channels=1}:duplicate{dst=rtp{,dst=:1234}}"

vlc -vvv test.wav --sout "#transcode{acodec=ulaw,samplerate=8000}:duplicate{dst=rtp{,dst=:1234}}"

vlc -vvv test.wav --sout "#transcode{acodec=ulaw,rate=8000}:duplicate{dst=rtp{,dst=:1234}}"

None result in the transcoding and streaming of the file, VLC just sits idle. Could anyone provide some more information on how correctly configure VLC to stream G-711 u-law? Any help would be appreciated.

Thanks!

[Rémi Denis-Courmont]

I believe sample transrating is currently broken in the development tree. Therefore you can only send G.711 if your audio source is natively 8kHz (or if you don't mind using µ-law at a higher frequency and with a dynamic RTP payload).

[pjain01]

Hi Remi,
Does it mean that in VLC ; PCMU/PCMA is supported with dynamic codec type ?

Regards,
Parveen

[Rémi Denis-Courmont]

On the sender side, yes.

[minataur]

I believe sample transrating is currently broken in the development tree. Therefore you can only send G.711 if your audio source is natively 8kHz (or if you don't mind using µ-law at a higher frequency and with a dynamic RTP payload).

hey, the soft phone pangolin supports G.711 as an audio codec which matches with VLC as u said.. but when i open the streaming menu and select the audio codec, there is no such option pls help me in this.. Can u tell me how to select that option?? cause i can't see it directly even after clicking on RTP
I'm using UBUNTU


Thank u