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Normal Topic RTP Header Extensions (Read 712 times)
MaRo
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RTP Header Extensions
23. Nov 2023 at 13:01
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Hello,

Does PhonerLite support RTP Header Extensions? Or does it at least know of their existence and ignores them?

I am writing an app that acts as a SIP-WebRTC gateway. WebRTC clients usually send RTP packets with header extension.
I am having a noise issue with an webRTC browser client and PhonerLite. I am wondering if this is related.
  
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Re: RTP Header Extensions
Reply #1 - 23. Nov 2023 at 13:07
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In theory PhonerLite should handle that. I have no way to test it. So can you please send me a Wireshark trace of such a call by e-mail? I will see then, if there is a problem with such extensions.
  
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MaRo
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Re: RTP Header Extensions
Reply #2 - 24. Nov 2023 at 10:06
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I have emailed you the wireshark capture.
My guess is that phonerLite is working with a fix RTP header size. When it does that, it will start reading the packet payload at the wrong offset: it will read the header extension as part of the payload. Hence the buzzing noise.
At least this was happening with the code I'm working with.
  
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Re: RTP Header Extensions
Reply #3 - 24. Nov 2023 at 10:47
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There was a wrong calculation of the offset. I uploaded a new beta version of PhonerLite. Can you please try that one? Thank you!
  
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