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RTP stream is empty or codec is unsupported

asked 2019-02-14 21:13:26 +0000

tscott16 gravatar image

I'm trying to analyze a VoIP call (RingCentral) but cannot get any audio playback. The stream can be found under Telephony > VoIP Calls as well as Telephony > RTP > RTP Streams but attempting to "Play Stream" just results in "RTP stream is empty or codec is unsupported". The codec is detected as Opus. I'm unsure how to troubleshoot this further.

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answered 2019-02-15 11:49:51 +0000

Anders gravatar image

Only a few codecs are supported for playback due to licensing. Opus is not one of the supported ones.

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So is there any way to play these files, or convert them to something that is supported?

tscott16 gravatar imagetscott16 ( 2019-02-15 15:00:00 +0000 )edit

Export the RTP payload as raw file and feed that into a decoder. That's the procedure in short. Additional problems arise when the packet boundaries are also relevant for the decoder as well, that information cannot be contained in a raw file. That would require a container format, something that is not supported.

Jaap gravatar imageJaap ( 2019-02-15 17:21:46 +0000 )edit

@Jaap, what decoder can we use to decode a .raw file? I'm having a problem finding one.

Richard1611 gravatar imageRichard1611 ( 2021-07-08 19:23:35 +0000 )edit

You''ll have to have a program that is willing to read raw binary data and interpret it according to the applicable codec. I know only of Audacity that does that to some degree, there will be others.

Jaap gravatar imageJaap ( 2021-07-09 12:24:59 +0000 )edit

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Asked: 2019-02-14 21:13:26 +0000

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Last updated: Mar 28 '20