The RTCRtpStreamStats dictionary's codecId property is a string which uniquely identifies the object that was inspected to produce the data in the RTCCodecStats for the RTP stream. 
 The RTCRtpStreamStats dictionary's codecId property is a string which uniquely identifies the object that was inspected to produce the data in the RTCCodecStats for the RTP stream. 
 A string which uniquely identifies the object from which the contents of the stream's RTCCodecStats are derived. 
No specification data found for api.RTCRtpStreamStats.codecId.
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    https://developer.mozilla.org/en-US/docs/Web/API/RTCRtpStreamStats/codecId