Interruption occurs when playing many RTSP

[kip9696]

hi, I playing rtsp stream as rtc
I play 5 or more streams
At this time, each stream will be cut off or stopped
Also the initial loading speed is slow or does not turn on

I using c5large, ec2
There seems to be no problem on the cpu, Is it a network problem?
traffic per video is 2Mpbs

Attach the video link

https://drive.google.com/file/d/1v25_r9fmGPbaJdZw5sLOfrt6w-Fs6KvG/view?usp=sharing

thx

 

[Max]

Looks like a bandwidth issue. You are trying to play 4 streams 2 mbps per stream, 8 Mbps in total.
Make sure your Amazon EC2 server is located in your region and you have a good channel towards this server.
You can check channel using iperf https://docs.flashphoner.com/displa...essorytools-Testingchannelbandwidthusingiperf

What you can do is

1. Switch playback to TCP.

Publishing and playing stream via WebRTC over TCP - Web Call Server 5.2 - EN - Flashphoner Documentation

docs.flashphoner.com

2. You can add 4 streams into the Mixer.
Then bitrate will be 2 Mbps instead of 8 Mbps. It can help to reduce bandwidth.

REST API

/mixer/add

Stream mixer - Web Call Server 5.2 - EN - Flashphoner Documentation

docs.flashphoner.com

Please note. Mixer utilizes a lot of CPU and RAM resources. So you pay by CPU and RAM for low Bitrate.

 

[kip9696]

okay thx

The bandwidth simulation result is down speed 1.59Gbps, up speed is 450Mbps
In the case of TCP execution, it was useless
And, I cant use mixer because later we bring hundreds of streams to one server
Also, now it's 4, but i can bring up to 16

In this case, is it possible to solve it with simple server expansion?
And, i can fetch 9 streams per session
Can the number be increased?

 

[Max]

The bandwidth simulation result is down speed 1.59Gbps, up speed is 450Mbps

Please check the channel between player and server using iperf via TCP. In UDP mode, iperf measures network adapter bandwith, not whole channel.
You can also use Media Devices example to test bandwidth as described here.
Also, it can be bandwidth issue between server and RTSP cameras.

In this case, is it possible to solve it with simple server expansion?

No. This is end-to-end bandwidth issue, server expansion does not help.

And, i can fetch 9 streams per session
Can the number be increased?

There are no such limits, you can play any number of streams at one page. 9 stream seems to be a maximum number your channel allows.
Please consider streams transcoding to lower resolution and bitrate. for example

session.createStream({
    name: "stream1",
    constraints: {
          audio: true,
          video: {
                width: 640,
                height: 360,
                bitrate: 500
         }
    }
}).play();

 

[kip9696]

There are no such limits, you can play any number of streams at one page. 9 stream seems to be a maximum number your channel allows.
Please consider streams transcoding to lower resolution and bitrate. for example

Even 100kb streams per one will cause an error from the 10th
So I am using 2 sessions

And what exactly does a channel mean?

 

[Max]

Even 100kb streams per one will cause an error from the 10th
So I am using 2 sessions

Unfortunately, we cannot reproduce the issue with latest WCS build in modified 2 Players example (see attach).
Please clarify the following:
1. What WCS version do you use?
2. What browser do you use for testing&
3. How do you test in details: establishing one Websocket connection (as done in 2 Players example), then play 10 streams, or establishing 1 Websoket connection per stream?
Please also collect a report on server side as described here, add browser console output to the report, and send it using this form

And what exactly does a channel mean?

A channel means whole the media traffic path from publishsing or playing client to server including last mile.