Re: [whatwg/streams] Explainer for proposed stream changes related to VideoFrame processing (PR #1193)

@youennf commented on this pull request.



> +*   Performing realtime transformations of `VideoFrame` objects, for instance taking a camera `MediaStreamTrack` and applying
+    a background blur effect as a `TransformStream` on each `VideoFrame` of the `MediaStreamTrack`.
+
+## End-user benefit
+
+*   `VideoFrame` needs specific management and be closed as quickly as possible, without relying on garbage collection.
+    This is important to not create hangs/stutters in the processing pipeline. By building support for safe patterns
+    directly in streams, this will allow web developers to optimize `VideoFrame` management, and allow user experience
+    to be more consistent accross devices.
+
+## Principles
+
+The envisioned changes to the streams specification could look like the following:
+*   Add a new 'transfer' value that can be passed to `ReadableStream` type, `WritableStream` type and `TransformStream` readableType/writableType.
+    For streams that do not use the 'transfer' type, nothing changes.
+*   Streams of the 'transfer' type can only manipulate that are marked both as Transferable and Serializable.

Moved to chunk

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