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Creation of Seekable Files #119

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@SingingTree

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@SingingTree

At the moment implementations of the MediaStream Recording API don't write seekable webm files. The WebM format doesn't make this particularly easy, as to write the cues in a useful fashion will require mutating the start of the file, either to write the cues there or manipulate the seek head. However, with the MediaRecorder API, it's the case the if requestData has been run, this data is no longer available for writing.

Would it work to expand the spec to encompass some way to handle this?

For example:

  • expose functionality to finalise recorded blobs: allowing implementations to modify the finalised blob(s) as needed for a given container
  • expose the ability to signal that data will not be requested until the end of recording, allowing the recorder to buffer data and finalise it, without concern for further potential future data

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