The clockRate property of the RTCCodecStats dictionary is a positive number containing the media sampling rate in hertz (Hz).
A positive number indicating the media sampling rate.
codecs.clockRate option in parameter passed to RTCRtpTransceiver.setCodecPreferences() and RTCRtpSender.setParameters().codecs.clockRate in object returned by RTCRtpSender.getParameters() and RTCRtpReceiver.getParameters().