1# Video Frame Tracking Id 2 3The Video Frame Tracking Id extension is meant for media quality testing 4purpose and shouldn't be used in production. It tracks webrtc::VideoFrame id 5field from the sender to the receiver to gather referenced base media quality 6metrics such as PSNR or SSIM. 7Contact <[email protected]> for more info. 8 9**Name:** "Video Frame Tracking Id" 10 11**Formal name:** 12<http://www.webrtc.org/experiments/rtp-hdrext/video-frame-tracking-id> 13 14**Status:** This extension is defined to allow for media quality testing. It is 15enabled by using a field trial and should only be used in a testing environment. 16 17### Data layout overview 18 1-byte header + 2 bytes of data: 19 20 0 1 2 21 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 22 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 23 | ID | L=1 | video-frame-tracking-id | 24 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 25 26Notes: The extension shoud be present only in the first packet of each frame. 27If attached to other packets it can be ignored.