Channel count (1 = mono, 2 = stereo).
The codec / container of DataBase64. 'webm-opus' for the default in-page recorder.
The encoded audio data, Base64-encoded (no data: prefix).
OptionalDurationApproximate duration of this chunk in milliseconds, when known.
Sample rate in Hz (typically 48000 for the Opus path).
Monotonically increasing sequence number for ordering / drop detection / resync.
A single encoded chunk of audio streamed FROM the remote browser to the user — the soundtrack of whatever the browser is playing (e.g. a YouTube video the co-agent is demoing). The sibling of RemoteBrowserScreencastFrame for audio: chunks feed the channel's client-side audio player (a MediaSource fed
audio/webm;codecs=opus).The default (Self-Hosted Chrome) capture path produces
'webm-opus'chunks via an in-pageMediaRecorder;'opus'/'pcm16'are reserved for future backend capture paths (e.g. a server-side virtual audio sink).