Agora RTC Objective-C API Reference
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Inherits <NSObject>.
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NSUInteger | uid |
NSUInteger | quality |
NSUInteger | networkTransportDelay |
NSUInteger | jitterBufferDelay |
NSUInteger | audioLossRate |
NSUInteger | numChannels |
NSUInteger | receivedSampleRate |
NSUInteger | receivedBitrate |
NSUInteger | totalFrozenTime |
NSUInteger | totalActiveTime |
NSInteger | publishDuration |
NSUInteger | frozenRate |
NSUInteger | mosValue |
AgoraExperienceQuality | qoeQuality |
AgoraExperiencePoorReason | qualityChangedReason |
The statistics of the remote audio.
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ID of the user sending the audio stream.
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The receiving audio quality.
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The network delay (ms) from the sender to the receiver.
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The jitter buffer delay (ms) at the receiver.
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The packet loss rate in the reported interval.
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The number of audio channels.
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The sample rate (Hz) of the received audio stream, represented by an instantaneous value.
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The bitrate (Kbps) of the received audio stream, represented by an instantaneous value.
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The total freeze time (ms) of the remote audio stream after the remote user joins the channel. In a session, audio freeze occurs when the audio frame loss rate reaches 4% within two seconds. Agora uses 2 seconds as an audio piece unit to calculate the audio freeze time. The total audio freeze time = The audio freeze number × 2 seconds
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The total time (ms) when the remote user neither stops sending the audio stream nor disables the audio module after joining the channel.
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The total publish duration (ms) of the remote audio stream.
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The total audio freeze time as a percentage (%) of the total time when the audio is available.
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The quality of the remote audio stream as determined by the Agora real-time audio MOS (Mean Opinion Score) measurement method in the reported interval. The return value ranges from 0 to 500. Dividing the return value by 100 gets the MOS score, which ranges from 0 to 5. The higher the score, the better the audio quality.
The subjective perception of audio quality corresponding to the Agora real-time audio MOS scores is as follows:
MOS score | Perception of audio quality |
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Greater than 4 | Excellent. The audio sounds clear and smooth. |
From 3.5 to 4 | Good. The audio has some perceptible impairment, but still sounds clear. |
From 3 to 3.5 | Fair. The audio freezes occasionally and requires attentive listening. |
From 2.5 to 3 | Poor. The audio sounds choppy and requires considerable effort to understand. |
From 2 to 2.5 | Bad. The audio has occasional noise. Consecutive audio dropouts occur, resulting in some information loss. The users can communicate only with difficulty. |
Less than 2 | Very bad. The audio has persistent noise. Consecutive audio dropouts are frequent, resulting in severe information loss. Communication is nearly impossible. |
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Quality of experience (QoE) of the local user when receiving a remote audio stream.
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The reason for poor QoE of the local user when receiving a remote audio stream. See #EXPERIENCE_POOR_REASON.