View Source WebRTC Endpoint

The WebRTC Endpoint is responsible for sending/receiving media tracks to/from a web borwser.

architecture

Architecture

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track-sender

Track Sender

TrackSender is responsible for observing track activity and publishing track data to the engine. In particular, it is responsible for sending Membrane.RTC.Engine.Event.TrackVariantResumed and Membrane.RTC.Engine.Event.TrackVariantPaused events, and replying to Membrane.KeyframeRequestEvent.

VariantTracker

A browser can pause sending some encoding when e.g. it doesn't have enough bandwidth. This fact is not communicated to the server. VariantTracker is responsible for tracking variant activity i.e. whether it is still active.

track-receiver

Track Receiver

TrackReceiver is responsible for receiving a track from the engine. In particular, it is responsible for sending the Membrane.RTC.Engine.Event.RequestTrackVariant event, forwarding keyframe requests from the browser to the TrackSender and repairing RTP packets after switching track variants.