Call Statistics

During RTC calls, the underlying RTC library reports detailed call metrics at intervals specified by RCRTCEngineSetup#statsReportInterval (default: 1 second). This data enables UI prompts and status monitoring.

Register listeners via the setStatsListener method in RCRTCEngine.

Detailed Specifications

• Callback parameters:

  onNetworkStats description:

  Parameter	Type	Description
  stats	RCRTCNetworkStats	Network status metrics

  onLocalAudioStats description:

  Parameter	Type	Description
  stats	RCRTCLocalAudioStats	Audio transmission metrics

  onLocalVideoStats description:

  Parameter	Type	Description
  stats	RCRTCLocalVideoStats	Video transmission metrics

  onLocalCustomVideoStats description:

  Parameter	Type	Description
  tag	String	Custom video resource TAG
  stats	RCRTCLocalVideoStats	Custom video transmission metrics

  onRemoteAudioStats description:

  In live streaming scenarios, hosts can monitor speaking participants' volume levels. In conference mode, all participants receive speaking indicators.

  Parameter	Type	Description
  roomId	String	Room ID
  userId	String	Remote user ID
  stats	RCRTCRemoteAudioStats	Audio reception quality metrics

  onRemoteVideoStats description:

  Parameter	Type	Description
  userId	String	Remote user ID
  stats	RCRTCRemoteVideoStats	Video reception quality metrics

  onLiveMixAudioStats description:

  Parameter	Type	Description
  stats	RCRTCRemoteAudioStats	Mixed audio stream reception metrics

  onLiveMixMemberAudioStats description:

  Audience members can monitor hosts' volume levels during live streams.

  Parameter	Type	Description
  userId	String	Remote user ID
  volume	int	Volume level

  onLiveMixVideoStats description:

  Parameter	Type	Description
  stats	RCRTCRemoteVideoStats	Mixed video stream reception metrics

  onRemoteCustomVideoStats description:

  Parameter	Type	Description
  userId	String	Remote user ID
  tag	String	Custom video resource TAG
  stats	RCRTCRemoteVideoStats	Custom video reception metrics

• RCRTCNetworkStats

  Property	Type	Description
  type	RCRTCNetworkType	Network type (Unknown/WiFi/Cellular)
  ip	String	IP address
  sendBitrate	int	Upload bitrate (kbps)
  receiveBitrate	int	Download bitrate (kbps)
  rtt	int	Round-trip delay (ms)

• RCRTCLocalAudioStats

  Property	Type	Description
  codec	RCRTCAudioCodecType	Codec type (PCMU/OPUS)
  bitrate	int	Bitrate (kbps)
  volume	int	Volume level
  packageLostRate	int	Packet loss rate (0-100)
  rtt	int	Round-trip delay (ms)

• RCRTCLocalVideoStats

  Property	Type	Description
  tiny	bool	Stream type (true: thumbnail, false: HD)
  codec	RCRTCVideoCodecType	Codec type (H264)
  bitrate	int	Bitrate (kbps)
  fps	int	Frame rate
  width	int	Video width
  height	int	Video height
  packageLostRate	int	Packet loss rate (0-100)
  rtt	int	Round-trip delay (ms)

• RCRTCRemoteAudioStats

  Property	Type	Description
  codec	RCRTCVideoCodecType	Codec type (H264)
  bitrate	int	Bitrate (kbps)
  volume	int	Volume level
  packageLostRate	int	Packet loss rate (0-100)
  rtt	int	Round-trip delay (ms)

• RCRTCRemoteVideoStats

  Property	Type	Description
  codec	RCRTCVideoCodecType	Codec type (H264)
  bitrate	int	Bitrate (kbps)
  fps	int	Frame rate
  width	int	Video width
  height	int	Video height
  packageLostRate	int	Packet loss rate (0-100)
  rtt	int	Round-trip delay (ms)

Sample Code

class StatsListenerImpl implements RCRTCStatsListener {

  @override
  void onNetworkStats(RCRTCNetworkStats stats) {
    // Network status metrics
  }

  @override
  void onLocalAudioStats(RCRTCLocalAudioStats stats) {
    // Audio transmission metrics
  }

  @override
  void onLocalVideoStats(RCRTCLocalVideoStats stats) {
    // Video transmission metrics
  }

  @override
  void onLocalCustomAudioStats(String tag, RCRTCLocalAudioStats stats) {
    // Currently unused
  }

  @override
  void onLocalCustomVideoStats(String tag, RCRTCLocalVideoStats stats) {
    // Custom video transmission metrics
  }

  @override
  void onRemoteAudioStats(String userId, RCRTCRemoteAudioStats stats) {
    // Audio reception metrics
  }

  @override
  void onRemoteVideoStats(String userId, RCRTCRemoteVideoStats stats) {
    // Video reception metrics
  }

  @override
  void onLiveMixAudioStats(RCRTCRemoteAudioStats stats) {
    // Mixed audio stream metrics
  }

  @override
  void onLiveMixVideoStats(RCRTCRemoteVideoStats stats) {
    // Mixed video stream metrics
  }

  @override
  void onRemoteCustomAudioStats(String userId, String tag, RCRTCRemoteAudioStats stats) {
    // Currently unused
  }

  @override
  void onRemoteCustomVideoStats(String userId, String tag, RCRTCRemoteVideoStats stats) {
    // Custom video reception metrics
  }

}

/// Register stats listener
engine.setStatsListener(StatsListenerImpl());

/// Remove stats listener
engine.setStatsListener(null);