Format of Multicast RTP stream

[srcurtis]

Hi

I'm trying to output a pre-recorded wav file to Yealink phones via vlc and RTP Multicast and am experiencing choppy audio.

Phones are T38G's and T42G's configured for PCMU.

When not using vlc and originating the stream from a Yealink phone, multicast from a phone to other phones gives a crystal clear stream.

Using vlc I am transcoding as follows:

--sout "#transcode{acodec=ulaw,ab=16,samplerate=8000,channels=1}:rtp{dst=224.0.1.201,por​t-audio=5439}"

The audio plays but is very choppy.

I'm at a loss as to what I am doing wrong and am questioning the format of the audio stream.

Any help would be much appreciated.

Thanks

Steve