While the best ingest server is automatically picked by the Twitch output plugin, you may want to manually check and/or select the ingest server if your viewers are experiencing lag or if you can't achieve the upload rate you are used to.
When clicking the on the Server drop-down on your Twitch Properties, ping statistics are shown and updated continuously for each of the ingest locations.
Three values are reported:
- The last measured and recorded ping round trip time.
- The average of the total samples recorded since the combo box was opened (up to the last 100 samples).
- The statistical variance of all previous samples (up to the last 100 samples)
Streaming service providers can't guarantee constant latency due to the complex nature of handling many multiple connections to their servers.
Server latency is important for real time video streaming and also important for bandwidth throughput on TCP based networks. Jitter shows the packet delay variation which is computed based on the previous ping samples using standard deviation formula. Large variations in transit time should also be avoided if possible.
Color metric for Last and Avg:
Green - value < 100ms
Yellow - 100ms <= value < 200ms
Red - 200ms <= value
Color metric for Jitter:
Green - value < 10ms
Yellow - 10ms <= value < 20ms
Red - 20ms <= value
Acknowledgement: Thanks to Richard Stanway (aka R1CH) for the inspiration to add this feature into XSplit.