iOS WebRTC mesh video conference call memory increasing issue

Question

Issue: I am working on iOS WebRTC mesh conference call of 4 persons and after running video conference call of 5 or 6 minutes, memory size is increasing and whole application becomes hang.

Scenario: 4 persons conference calls for only audio or only video(without audio) is working fine. but facing memory size increasing issue with 4 person on video conference call.

What we are doing:

1. We are using very low bit rates and frames and default video codec.

Profiler screen shot:

Using below configuration for 4 persons: Minimum bit rate: 10000 Maximum bit rate: 40000 Current bit rate: 20000

We are using lowest resolution of the device via:

 private func startCapturer(frontCamera:AVCaptureDevice, capturer:RTCCameraVideoCapturer) {
        let fps = 15
        let options = RTCCameraVideoCapturer.supportedFormats(for: frontCamera)
            var supportable = (options.sorted { (f1, f2) -> Bool in
                let width1 = CMVideoFormatDescriptionGetDimensions(f1.formatDescription).width
                let width2 = CMVideoFormatDescriptionGetDimensions(f2.formatDescription).width
                return width1 < width2
            }).first! 
        capturer.startCapture(with: frontCamera,
                              format: supportable,
                              fps: fps)

}

Answer 1

Please refer to these links for better understanding:

Users in WebRTC call

and for the performance evaluation please follow the document:

Performance evaluation for WebRTC