Stream Statistics

The following table lists the Streaming Output statistics:

Tip

Scroll down for SRT graphical statistics example.

Output

Output Statistic	Description/Values
State	The current operating status of the stream, either: STREAMING STOPPED LISTENING CONNECTING SECURING RESOLVING SCRAMBLED FAILED For details, see Configuring Streams.
Up Time	(only available when State is STREAMING) The length of time the stream is actively streaming (e.g., 1d22h5m41s).
Source Port	The UDP source port for an SRT stream, i.e., the port from which the encoder is sending the SRT stream.
Sent Packets	Number of RTP or UDP packets sent for that stream.
Sent Bytes	Number of Bytes sent for that stream.
Bitrate	The stream bitrate (in kbps).
Reset	Click to reset the Output statistics.

SRT

SRT Statistic	Description/Values
Path	(Redundant connections only) Descriptive path names (if assigned), or Path 1 and Path 2.
State	The current operating status of the stream or redundant connections, for example, CONNECTING, STREAMING, STOPPED, or PAUSED.
Peer Version	(Redundant connections only) The SRT version used for the connections.
Reconnections	Number of reconnections since the stream started. Severe network congestion may cause the connection to drop and automatically reconnect.
Source Port	The UDP source port for the SRT stream or redundant connections, i.e., the port from which the encoder is sending the stream.
AES Encryption	Indicates whether Advanced Encryption Standard (AES) encryption has been enabled.
Key Length	The key length for AES encryption, either: None, AES-128, or AES-256
Resent Packets	Number of packets retransmitted following a lost report from the decoder.
Resent Bytes	Total bytes of the lost packets retransmitted.
Dropped Packets	Number of dropped packets.
Dropped Bytes	number of dropped bytes.
Received ACKs	Transmission progress acknowledgement and feedback.
Received NAKs	Lost packet reports.
Max Bandwidth	Maximum bandwidth (input stream rate * (1 + overhead)).
Path Max Bandwidth	Estimated link bandwidth. This can change due to cross traffic.
MTU	(Maximum Transmission Unit) The maximum allowed size of IP packets for the outgoing RTP data stream.
RTT	Measured Round Trip Time.
Local Buffer Level	Encoder buffers in milliseconds. SRT encoder buffers are unacknowledged stream packets (reception not confirmed by the receiver/decoder). The encoder buffer in absence of congestion or packet lost is around the RTT value. In presence of recoverable packets lost, the value should be between the RTT and Latency. Encoder buffers above Latency will most probably have an impact on the decoder and affect the user's experience. Tip If the Buffer goes to or above the Latency value often, then there is most likely insufficient bandwidth to support the desired bitrate. In this case, decrease your bitrate. If the Buffer occasionally goes to or above the Latency Value, then the SRT Latency should be increased.
Latency	Maximum of the decoder and encoder configured in (Buffering) Latency. For example: Encoder Configured SRT Latency = 750 Decoder Configured SRT Latency = 20 The SRT Stats Latency (which is the current SRT connection applied Buffering Latency) = 750 (largest of the two). At startup, handshake exchanges the value configured on both sides and the largest one is selected. The decoder default is set to the minimum (20ms) so it can be completely controlled from the other side.

SRT streams include a graphical statistics display as shown in the following example:

Note

The Link Bandwidth is an estimate of the actual link bandwidth.