demo · v135

RTCEncodedFrame.timestamp

Chrome 135 exposes captureTimestamp and receiveTimestamp on encoded WebRTC frames so insertable streams can measure pipeline latency at frame granularity. The demo wires a loopback RTCPeerConnection, attaches a frame transform, and prints each encoded chunk's metadata.

RTCPeerConnection: ? RTCRtpScriptTransform: ?

encoded-frame log

the code

const sender = pc.getSenders()[0];
const { readable, writable } = sender.createEncodedStreams();
readable.pipeThrough(new TransformStream({
  transform(frame, controller) {
    console.log(frame.timestamp, frame.captureTimestamp, frame.metadata());
    controller.enqueue(frame);
  },
})).pipeTo(writable);

see also