RTP header extensions

[Christophe Chaillon]

Hi,

I am using WebRTC M89 (c++)

How can I enable a RTP header extension ? 

For example : I see that the "absolute capture time" extension exists in the code but it is not added to the SDP offer. How can I ask to webrtc to add it ?

Thanks,

Christophe

[Vitaly Ivanov]

Hi Christophe,

You need to call GetTransceivers() on PeerConnection (after adding tracks), and then do SetOfferedRtpHeaderExtensions() with webrtc::RtpHeaderExtensionCapability(webrtc::RtpExtension::kAbsoluteCaptureTimeUri) on those transceivers (there's usually only 1)

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[Christophe Chaillon]

Thanks, I will try this!

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