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webrtc/docs/native-code/rtp-hdrext/video-frame-tracking-id
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Jeremy Leconte 4f88a9d1c3 Create a VideoFrameTrackingId RTP header extension. 
Bug: webrtc:12594
Change-Id: I518b549b18143f4711728b4637a4689772474c45
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/212084
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Jeremy Leconte <jleconte@google.com>
Cr-Commit-Position: refs/heads/master@{#33567}
2021-03-25 17:25:18 +00:00
..
README.md

README.md

Video Frame Tracking Id

The Video Frame Tracking Id extension is meant for media quality testing purpose and shouldn't be used in production. It tracks webrtc::VideoFrame id field from the sender to the receiver to gather referenced base media quality metrics such as PSNR or SSIM. Contact jleconte@google.com for more info.

Name: "Video Frame Tracking Id"

Formal name: http://www.webrtc.org/experiments/rtp-hdrext/video-frame-tracking-id

Status: This extension is defined to allow for media quality testing. It is enabled by using a field trial and should only be used in a testing environment.

Data layout overview

 1-byte header + 2 bytes of data:

  0                   1                   2
  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |  ID   | L=1   |    video-frame-tracking-id    |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Notes: The extension shoud be present only in the first packet of each frame. If attached to other packets it can be ignored.