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<body class='hmmessage'><div dir='ltr'>Greetings everyone,<div><br></div><div>I was wondering if there was a way to change the codec that Asterisk uses when streaming via MulticastRTP. Or perhaps a way to transcode the multicast stream.</div><div><br></div><div>In the CLI, when I have a multicast stream in progress, I am typing 'core show channel MulticastRTP/0x7f7........' to get lots of helpful information.</div><div><br></div><div><span style="font-size: 12pt;">I have noticed that when I </span>do a MULTICAST page and<b> send data from MP3Player</b>, I get no sound on my speakers and get the following from 'core show channel PJSIP/xxx':</div><div><br></div><div><div>NativeFormats: (slin)</div><div>WriteFormat: slin</div><div>ReadFormat: slin</div><div><b>WriteTranscode: No </b></div><div><b>ReadTranscode: No </b></div></div><div><br></div><div>I have noticed that when I do a UNICAST page and<b> send data from MP3Player</b>, everything works flawlessly and I get the following from 'core show channel MulticastRTP':</div><div><br></div><div><div>NativeFormats: (ulaw)</div><div>WriteFormat: slin</div><div>ReadFormat: slin</div><div><b>WriteTranscode: Yes (slin@8000)->(ulaw@8000)</b></div><div><b>ReadTranscode: Yes (ulaw@8000)->(slin@8000)</b></div></div><div><br></div><div><br></div><div>The <b>only</b> thing that is changing is the following line in my extensions.conf file:</div><div><br></div><div>; For Multicast Paging</div><div><div>same => n(next),Page(MulticastRTP/basic/239.1.1.2:6061,q)</div><div><br></div><div>; For Unicast Paging</div><div>same => n(next),Page(PJSIP/107&PJSIP/108,ib(pjsip-auto-answer-header^addheader^1)|p})</div></div><div><br></div><div><br></div><div>Is there any way to get the MP3Player stream to transcode (as it does on the UNICAST stream) when I try to MULTICAST?</div><div><br></div><div>Thanks for the help,</div><div><br></div><div>--Matt</div> </div></body>
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