Often "No remote video available" with UV4L and Janus Room

[Sebastien Risler]

Hi all,

I am publishing a video stream from Raspberry CM3+ to a janus video room which I am hosting on my own server. I am playing with the "video room" demo.

Regarding video from regular browser from laptop webcam, it is quite fine.

However, the video stream of my Raspeberry gets cut randomly by "No remote video available". It is random, but as an average, I would say every 20 seconds, for 1 second. Which is quite annoying.

On the Raspberry, I am using uv4l server, following http://www.linux-projects.org/uv4l/tutorials/janus-gateway/
The configuration is the one of the tuto.

My janus room is :
publishers = 3 bitrate = 1000000 fir_freq = 1 #audiocodec = "opus" videocodec = "vp8" record = false #rec_dir = "/path/to/recordings-folder"

I played with bitrate, fir_freq video format on the Pi etc... but nothing seems to have an impact.

Do you have any clue to improve this ?

Thank you very much

PS: Network is fine (optical fiber) and CPU is ok (<40% on the Pi, almost nothing on the server)

[Lorenzo Miniero]

"No remote video available" is a consequence of an onmuted event being called on the video track, which is usually caused by the browser not receiving or not being able to decode the video stream for a while. Whether the cause is packet loss or occasional inability to decode the video I don't know (uv4l is not our project and we don't provide support for it). You can modify the demo to ignore those events, if you find them annoying, but that's something the browser tells you, not Janus.

L.

[Avital Yachin]

Hi Lorenzo,

We have similar behavior with the Video Room demo and Janus 0.9.3. We get lots of flickering and "remote video not available" every few seconds (mute/unmute events in the browser console).

This doesn't happen on the same machine/network with Janus 0.7.4.

Any idea what could cause it? Any way to suppress this behavior of the demo via config?

Thanks.

[Alessandro Amirante]

https://github.com/meetecho/janus-gateway/pull/1972

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