Stream Statistics

The following sections list the Streaming Output statistics:

Tip

See the SRT section for an 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 Streaming.
Up Time	(only available when State is STREAMING) The length of time the stream is actively streaming (e.g., 1d22h5m41s).
Port	The UDP source port for the RTP or UDP stream, i.e., the port from which the encoder is sending the stream.
Sent Packets	Number of RTP or UDP packets sent for that stream.
Sent Bytes	Number of Bytes sent for that stream.
Unsent Packets	Number of RTP or UDP packets not sent for that stream.
Unsent Bytes	Number of Bytes not sent for that stream.
Bitrate	The stream bitrate (in kbps).
Last Error	The last logged error (number and description).
Occurred	The time at which the last error was logged (i.e., how long ago).

Note

Click Reset to reset the current output stream statistics.
Click Detailed Statistics to open the detailed output stream statistics page. From here, click Back to Streams to return to the Streams List view.

SRT

To view the SRT-specific statistics,

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. STREAMING LISTENING SCRAMBLED FAILED CONNECTING RESOLVING SECURING STOPPED See Configuring Streaming for further details.
Peer Version	(Redundant connections only) The SRT version used for the connections.
Reconnections	The number of reconnections since the stream started. Severe network congestion may cause the connection to drop and automatically reconnect.
Local Port	The UDP source port for the SRT stream or redundant connections, i.e., the port from which the encoder is sending the stream.
Encryption	(Encryption must be enabled) Indicates whether Advanced Encryption Standard (AES) encryption has been enabled.
Key Length	(Encryption must be enabled) The key length for AES encryption, either: None, AES-128, or AES-256.
Authentication	(Encryption must be enabled) Displays the Authenticated-Encryption with Associated-Data (AEAD) being used in the stream, either: None, Auto, or AES-GCM .
Peer Decryption	(Encryption and Authentication must be enabled) Provides the status of the stream decryption at the peer end. If the peer is properly configured (with the correct passphrase) to decrypt the stream, the status is Active.
Resent Packets	The number of packets retransmitted following a lost report from the decoder.
Resent Bytes	Total bytes of the lost packets retransmitted.
Dropped Packets	The number of dropped packets.
Dropped Bytes	The 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 of redundant transport paths:

Note

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

See Configuring SRT Path Redundancy for more on the detailed SRT stream statistics.

Related Topics