HTMLVideoElement.requestVideoFrameCallback()

Category: Multimedia
Type: New or changed feature
Status: Enabled by default (Chrome 83)
Intent stage: Evaluate readiness to ship

Summary

HTMLVideoElement.requestVideoFrameCallback() registers a one-shot callback, called when a video frame has been presented for composition. It also provides useful metadata about that frame.

Motivation

This features allows web applications that use WebGL or <canvas> with <video> to composite at the video rate rather than the display rate. It also allows for reliable video metadata which can be correlated with other page events (e.g. user inputs) and used for automated analysis. It also allows frame-accurate web-platform-tests.

Standards & signals

Specification: https://wicg.github.io/video-rvfc/
Firefox: Positive — There are still outstanding naming issues. The official stance is somewhere between 'not harmful' and 'useful/positive'.
Safari: No signal — https://lists.webkit.org/pipermail/webkit-dev/2020-January/031030.html https://lists.webkit.org/pipermail/webkit-dev/2020-February/031111.html
Web developers: Positive — Various amounts of positive interest has been surfaced by developpers. E.g.: https://github.com/WICG/video-raf/issues/3#issuecomment-591948740
Tracking bug: https://bugs.chromium.org/p/chromium/issues/detail?id=1012063

Docs: https://web.dev/requestvideoframecallback-rvfc/

Explainers: https://github.com/WICG/video-rvfc/blob/gh-pages/explainer.md

View on chromestatus.com