matrix-spec/data/event-schemas/schema/components/sdp_stream_metadata.yaml

type: object
x-addedInMatrixVersion: "1.10"
description: |-
  Metadata describing the [streams](/client-server-api/#streams) that will be
  sent.
  
  This is a map of stream ID to metadata about the stream.
additionalProperties:
  type: object
  title: StreamMetadata
  description: Metadata describing a stream.
  properties:
    purpose:
      type: string
      enum:
      - m.usermedia
      - m.screenshare
      description: |-
        The purpose of the stream.

        The possible values are:

        * `m.usermedia`: Stream that contains the webcam and/or microphone
          tracks.
        * `m.screenshare`: Stream with the screen-sharing tracks.
    audio_muted:
      type: boolean
      description: |-
        Whether the audio track in the stream is muted.

        Defaults to `false` if not present.
      x-addedInMatrixVersion: "1.11"        
    video_muted:
      type: boolean
      description: |-
        Whether the video track in the stream is muted.

        Defaults to `false` if not present.
      x-addedInMatrixVersion: "1.11"        
  required:
  - purpose