RTCRtpStreamStats: codecId property
  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.
Value
  A string which uniquely identifies the object from which the contents
  of the stream's RTCCodecStats are derived.
Specifications
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No specification data found for api.RTCRtpStreamStats.codecId.
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