Is it possible to get a steady 30fps in Android screen share?

Developers
1

Hi,

I saw that it maybe possible to get 30 fps in desktop screen share and I want to know if it is possible to get 30 fps in Android screen share.

Thanks

2

We limit screen shares to 15 fps and that is not currently configurable.

3

Hi,

Currently we have 5 fps, so 15 will be an improvement.
The fps was seen via the following logs:
I org.webrtc.Logging: EglRenderer: Duration: 4007 ms. Frames received: 2. Dropped: 0. Rendered: 2. Render fps: .5. Average render time: 4891 us. Average swapBuffer time: 2699 us.
Fps is changing from 0 to 5 depending on video (if video is not changing fps drop to zero. If video changes a lot fps goes to 5).

We use SDK 6.2.2 and we also have our own server in Azure so we can change config.js
The 5 fps is with H.264 and hardware/software decoding/encoding (Note: We enabled p2p for hardware encoding/decoding on our Azure jitsi server) and also with VP8 (when using meet.jit.si)
Do you know why we are not able to get 15 fps?
More info:
All of our tests were done in 2 devices on local network with 1G internet connection.

Thanks

4

The limit seems to be coming from WebRTC. There is no framerate setting, it just uses the MediaProjection API and processes the frames as they come.

5

Hi Saghul,

In jitsi web interface there a configuration for FPS - supported values are: 5,15,30 (can be seen in settings->more).
I was doing some testing with those values and i can see that FPS is changing between 5-30.
It is not one to one aligned with the configuration - for example: I have seen FPS > 5 when it was set to 5 and also FPS > 15 when it was set to 15.
So it seems that jitsi can work in FPS > 15 and jitsi code also affect the FPS.

I will appreciate your comment.

Thanks

6

The web and the native SDKs are different in this regard. You can’t really compare them because it’s not possible to screen share from a web browser on a mobile device.