The isTypeSupported() method of the MediaSource interface returns a Boolean value indicating if the given MIME type is supported by the current user agent — this is, if it can successfully create SourceBuffer objects for that MIME type.
The MediaSource() constructor of the MediaSource interface constructs and returns a new MediaSource object with no associated source buffers.
The readyState read-only property of the MediaSource interface returns an enum representing the state of the current MediaSource. The three possible values are:
The removeSourceBuffer() method of the MediaSource interface removes the given SourceBuffer from the SourceBuffers list associated with this MediaSource object.
The sourceBuffers read-only property of the MediaSource interface returns a SourceBufferList object containing the list of SourceBuffer objects associated with this MediaSource.
The abort() method of the SourceBuffer interface aborts the current segment and resets the segment parser.
The appendBuffer() method of the SourceBuffer interface appends media segment data from an ArrayBuffer or ArrayBufferView object to the SourceBuffer.
The appendStream() method of the SourceBuffer interface appends media segment data from a ReadableStream object to the SourceBuffer.
The appendWindowEnd property of the SourceBuffer interface controls the timestamp for the end of the append window, a timestamp range that can be used to filter what media data is appended to the SourceBuffer. Coded media frames with timestamps wthin this range will be appended, whereas those outside the range will be filtered out.
The appendWindowStart property of the SourceBuffer interface controls the timestamp for the start of the append window, a timestamp range that can be used to filter what media data is appended to the SourceBuffer. Coded media frames with timestamps wthin this range will be appended, whereas those outside the range will be filtered out.
The audioTracks read-only property of the SourceBuffer interface returns a list of the audio tracks currently contained inside the SourceBuffer.
The buffered read-only property of the SourceBuffer interface returns the time ranges that are currently buffered in the SourceBuffer.
The mode property of the SourceBuffer interface controls whether media segments can be appended to the SourceBuffer in any order, or in a strict sequence.
The remove() method of the SourceBuffer interface removes media segments within a specific time range from the SourceBuffer.
The textTracks read-only property of the SourceBuffer interface returns a list of the text tracks currently contained inside the SourceBuffer.
The timestampOffset property of the SourceBuffer interface controls the offset applied to timestamps inside media segments that are appended to the SourceBuffer.
The trackDefaults property of the SourceBuffer interface specifies the default values to use if kind, label, and/or language information is not available in the initialization segment of the media to be appended to the SourceBuffer.
The updating read-only property of the SourceBuffer interface indicates whether the SourceBuffer is currently being updated — i.e. whether an SourceBuffer.appendBuffer()SourceBuffer.appendStream(), or SourceBuffer.remove() operation is currently in progress.
The videoTracks read-only property of the SourceBuffer interface returns a list of the video tracks currently contained inside the SourceBuffer.