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7. Diagrams in chrome://webrtc-internals for the second stream:
Maximum number of streams to play on the same page simultaneously
Maximum number of streams to play on the same page simultaneously with acceptable quality depends on the following parameters:
- a single stream parameters (resolution amd bitrate)
- channel bandwidth from server to client
- a transport used (UDP or TCP)
- client device performance
For example, the following maximum values are experimentally obtained for the stream 1920x1080 with 2 Mbps bitrate using TCP transport on channel bandwidth 30-35 Mbps:
- Intel Core i5 8 gen and newer based PC, from 8 Gb RAM: up to 15 audio+video streams, or up to 6 audio+video and 14 audio only streams
- A flagship Android/iOS device of year 2018 and newer (Samsung S series, Apple iPhone Pro): up to 15 audio+video streams, or up to 6 audio+video and 14 audio only streams
- A middle ol lower class device, or obsoleted Android/iOS device (Nokia 5, Apple iPhone 7): up to 6 audio+video streams, or audio only streamsÂ
Thus, for the stream 1920x1080 with 2 Mbps bitrate seems optimal to play no more than 6 streams on the same page for any client can play them.
Let's test a webinar case: one desktop stream 1920x1080 with 2 Mbps bitrate and a number of webcam streams 640x360 with 500 kbps bitrate. Under the same channel conditions:
- Intel Core i5 8 gen and newer based PC, from 8 Gb RAM: up to 25 audio+video streams, or up to 6 audio+video and 25 audio only streams
- A flagship Android/iOS device of year 2018 and newer (Samsung S series, Apple iPhone Pro): up to 20 audio+video streams, or up to 6 audio+video and 25 audio only streams
- A middle ol lower class device, or obsoleted Android/iOS device of year 2017 and newer: up to 10 audio+video streams, or up to 6 audio+video and 15 audio only streams
Thus, for webinar case with one desktop stream and a number of webcam streams seems optimal to play no more than 10 streams on the same page for any client can play them.
WebRTC stream playback in custom player
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