Re: [mediacapture-transform] What is the timestamp value of the VideoFrame and AudioFrame from a remote webrtc stream track? (#87) from youennf via GitHub on 2024-09-19 (public-webrtc-logs@w3.org from September 2024)

From: youennf via GitHub <sysbot+gh@w3.org>
Date: Thu, 19 Sep 2024 12:42:28 +0000
To: public-webrtc-logs@w3.org
Message-ID: <issue_comment.created-2360883829-1726749746-sysbot+gh@w3.org>

This is being discussed in https://github.com/w3c/mediacapture-transform/issues/96.
It seems good to me for each spec defining a track source to define how to extract a VideoFrame from it.

As of webrtc video frames, the closest I could get is the definition of [captureTime](https://wicg.github.io/video-rvfc/#dom-videoframecallbackmetadata-capturetime): 
`For video frames coming from remote source, the capture time is based on the RTP timestamp of the frame and estimated using clock synchronization. This is best effort and can use methods like using RTCP SR as specified in RFC 3550 Section 6.4.1, or by other alternative means if use by RTCP SR isn’t feasible.`


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Received on Thursday, 19 September 2024 12:42:29 UTC