Accessing the abs-capture-time extension

[Duncan Williams]

Hi all,

I have a use case where I want to send capture timestamps along with the video frames. I'm using the native C++ API.  I've looked into the various timestamp fields that are part of VideoFrame and other objects but they never seem to be passed from sender to receiver. I saw that there is an abs-capture-time header extension that appears to do what I want. However I can find no examples or hints as to how to enable or access this timestamp.

I see extensions being negotiated in the SDP but cannot seem to find any indication that abs-capture-time is being populated.

Thanks,

Duncan