Peerconnection, Webrtcsession, Videotrack's relationship

Local video to send out, you need to add videotrack (contained in the stream) to the peerconnection, it added to the process is quite complicated, first look at the relevant class diagram:

Then we'll look at the process of creating:

From the local video rendering of the previous article, you can tell that to get a picture, you need to register yourself in Videotrack by using a "sink" through Addorupdatesink (), so that when a frame image is ready, by calling Sink's Onframe () To process the picture. Let's look at the following diagram: