AudioChannel

The Audio channel only receives data and does not send data to this channel.

Packet format

Total length: 12-?? bytes

Name	Type	Description
Frame ID	UInt32 (4bytes)	Video Frame ID
Timestamp	UInt32 (4bytes)	Timestamp of the video frame
Frame size	UInt32 (4bytes)	Unknown
Frame Data	Bytes (? bytes)	Rest of the packet is the Audio frame data in Opus format

Javascript example

The example code below shows how the data is read in javascript. The first parameter in getUint32 is the offset. From byte 12 the audio frame data can be read. You need to decode the audio frame data using a libopus decoder.

var messageBuffer = new DataView(eventData.data);

var frameId = messageBuffer.getUint32(0, true);
var timestamp = (messageBuffer.getUint32(4, true)/10);
var frameSize = messageBuffer.getUint32(8, true);

var offset = 12
var frameBuffer = new Uint8Array(eventData.data, offset)