README.md
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.