Update Insertable Streams for MediaStreamTrack API to spec

[jan-ivar]

Description

• Update the Insertable Streams for MediaStreamTrack API and related interfaces to spec
• Mark MediaStreamTrackProcessor as experimental due to the [edit: adds a warning about] two implementations being incompatible
• Call-outs to nonstandard browser differences

Motivation

The old articles were incorrectly mixing examples and browser support data between the two incompatible implementations. Clear up confusion around what is standard and differences that have shipped.

Additional details

• Spec: https://w3c.github.io/mediacapture-transform/

Related issues and pull requests

I plan to update browser data next, using annotations to highlight who supports what

[github-actions]

Preview URLs (12 pages)

• /en-US/docs/Web/API/Insertable_Streams_for_MediaStreamTrack_API
• /en-US/docs/Web/API/MediaStreamTrackGenerator/MediaStreamTrackGenerator
• /en-US/docs/Web/API/MediaStreamTrackGenerator
• /en-US/docs/Web/API/MediaStreamTrackProcessor/MediaStreamTrackProcessor
• /en-US/docs/Web/API/MediaStreamTrackProcessor/readable
• /en-US/docs/Web/API/MediaStreamTrackProcessor
• /en-US/docs/Web/API/VideoTrackGenerator/VideoTrackGenerator
• /en-US/docs/Web/API/VideoTrackGenerator/muted
• /en-US/docs/Web/API/VideoTrackGenerator/track
• /en-US/docs/Web/API/VideoTrackGenerator/writable
• /en-US/docs/Web/API/VideoTrackGenerator
• /en-US/docs/Web/API/Web_Workers_API/Transferable_objects

External URLs (5)

URL: /en-US/docs/Web/API/Insertable_Streams_for_MediaStreamTrack_API
Title: Insertable Streams for MediaStreamTrack API

• https://blog.mozilla.org/webrtc/unbundling-mediastreamtrackprocessor-and-videotrackgenerator/ (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/API/MediaStreamTrackProcessor
Title: MediaStreamTrackProcessor

• https://blog.mozilla.org/webrtc/unbundling-mediastreamtrackprocessor-and-videotrackgenerator/ (1 time) (Note! This may be a new URL 👀)
• https://developer.chrome.com/docs/capabilities/web-apis/mediastreamtrack-insertable-media-processing (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/API/VideoTrackGenerator
Title: VideoTrackGenerator

• https://blog.mozilla.org/webrtc/unbundling-mediastreamtrackprocessor-and-videotrackgenerator/ (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/API/VideoTrackGenerator/VideoTrackGenerator
Title: VideoTrackGenerator: VideoTrackGenerator() constructor

• https://developer.chrome.com/docs/capabilities/web-apis/mediastreamtrack-insertable-media-processing (1 time) (Note! This may be a new URL 👀)

(comment last updated: 2025-04-16 00:48:25)