MediaStreamTrackProcessor and VideoTrackGenerator

[jan-ivar]

Following on #1044.

Request for Mozilla Position on an Emerging Web Specification

• Specification title: MediaStreamTrack Insertable Media Processing using Streams
• Specification or proposal URL (if available): https://www.w3.org/TR/mediacapture-transform
• Explainer URL (if available): Explainer is outdated. This recent mozilla blog covers recently shipped APIs.
• Proposal author(s) (@-mention GitHub accounts): @alvestrand, @youennf
• Caniuse.com URL (optional):
  • https://caniuse.com/?search=MediaStreamTrackProcessor
  • https://caniuse.com/?search=VideoTrackGenerator
• Bugzilla URL (optional):
  • https://bugzil.la/1749532
  • https://bugzil.la/1749533
• Mozillians who can provide input (optional): @jan-ivar
• WebKit standards-position: shipped in Safari 18

Other information

Transfer of MST (#1044) is already marked positive and is a prerequisite for these APIs, which in the spec are only exposed in DedicatedWorker.

[jan-ivar]

I'm in favor of these APIs, as they encourage web developers to get video processing off the main thread. I recommend a positive position.