Issues with simultaneous streams in same browser

General
1

I’m trying to use Janus with the streaming plugin to deliver video to a web page. I’d like to show a dozen or so videos simultaneously on the same page, each connected to Janus playing a different stream. The H264+Opus streams are being delivered to Janus over rtp from ffmpeg.

On the browser frontend:

  • The first 5 streams start well.
  • When I add a 6th stream, it starts slowly.
  • When I add a 7th stream, it will usually not start, or will be very slow to start (minutes).

As long as I stay in the same browser, these seem to hold true whether I’m viewing them on a single page, or separate pages with one video on each. I see this same behaviour regardless of if I’m using Chrome, Safari or Edge.

Weirdly, if I open an entirely different browser like Edge at the same time, while the streams are actively still trying to connect a 7th stream in Chrome, I can quickly open another 5 streams in Edge. That browser then suffers from the same symptoms if I try to open a 6th & 7th stream.

Is there a limitation to the number of webrtc sessions supported by Janus in a single browser session?

I’m currently on v1.2.4, but have also tried a few earlier builds and seen the same issue.

This is one of the sessions not connecting. You can see there is a few calls there than took 25-30+ seconds.

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image1351×915 54 KB

2

Already answered many times. Browsers limit the number of concurrent HTTP calls to the same server to 6, so if you’re using REST as a way to connect to Janus, long polls will take them all and your regular requests will be greatly delayed. You’ll need different browsers or multiple browser profiles to test more than 5 connections.

1 Like
3

Thanks! I did search for this, but didn’t manage to find the previous discussion.