3.2.5.2.3.5 Sending an On Playback Rate Changed Message
The structure and fields of the On Playback Rate Changed message are specified in section 2.2.5.3.5.
The On Playback Rate Changed message MUST be sent when the rate of playback for a presentation is changed on the server. This message MAY<15> be sent multiple times if the detection of playback rate change happens in a stream and if there are multiple streams in a presentation.