The timestamp read-only property of the EncodedVideoChunk interface returns an integer indicating the timestamp of the video in microseconds.

An integer.

In the following example the timestamp is printed to the console.

const init = {
  type: "key",
  data: videoBuffer,
  timestamp: 23000000,
  duration: 2000000,
};
chunk = EncodedVideoChunk(init);
console.log(chunk.timestamp); //23000000