Synchronous = SetMetadata() returns immediately, having affected the metadata Asynchronous = SetMetadata() (probably) posts a task that performs the modification, and returns a promise that will resolve when the modification is done. I don't think exposing the attributes as individually mutable makes sense, and having one mutator for each piece of modifiable metadata seems an invitation to interface cruft. I also imagine that the only time SetMetadata makes sense is after a frame has been created or received, and before enqueueing it to its destination; modifying it at any other time would be a positive invitation to a race condition. webcodecs (https://w3c.github.io/webcodecs/#encodedvideochunk-interface) seems to have ignored frame-attached metadata. Instead, it chose to emit EncodedVideoChunkMetadata on its callback interface, alongside the video frame itself: https://w3c.github.io/webcodecs/#encoded-video-chunk-metadata One of the pieces of their metadata is the "VideoDecoderConfig". -- GitHub Notification of comment by alvestrand Please view or discuss this issue at https://github.com/w3c/webrtc-encoded-transform/issues/135#issuecomment-1163048409 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-configReceived on Wednesday, 22 June 2022 12:41:01 UTC
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