Camera freezing issue in iOS using webRTC video source

[Bhavani Chada]

Hi

I have implemented video calling application using webRTC where i'm using RTCVideosource for to get the local video capturing.I'm facing freezing issue with camera while flipping and when call is coming from background.I have gone through lot of research but didn't find any solution.Here i'm posting the code for camera flipping and initialization.Can anyone please help on this.

I'm using below code for video capturing

//

let videoSource = self.peerConnectionFactory.videoSource()  
 self.videoCapturer = RTCCameraVideoCapturer(delegate: videoSource)  
  let videoTrack = self.peerConnectionFactory.videoTrack(with: videoSource, trackId: "video0")

//

and below is the code for to switch the camera

//

if let capturer = self.videoCapturer as? RTCCameraVideoCapturer { var targetDevice: AVCaptureDevice? var targetFormat: AVCaptureDevice.Format?

        // find target device
        let devicies = RTCCameraVideoCapturer.captureDevices()
        print("devices count is :\(devicies.count)")
        devicies.forEach { (device) in
            if device.position ==  cameraPositon{
                targetDevice = device
            }
            else {
                print("camera position is:\(cameraPositon.rawValue)::\(device.position.rawValue):\(targetDevice)")
            }
            
        }
        
        // find target format
        let formats = RTCCameraVideoCapturer.supportedFormats(for: targetDevice!)
        print("supported formats are:\(formats)")
        formats.forEach { (format) in
            for _ in format.videoSupportedFrameRateRanges {
                let description = format.formatDescription as CMFormatDescription
                let dimensions = CMVideoFormatDescriptionGetDimensions(description)
                
                if dimensions.width == videoWidth && dimensions.height == videoHeight ?? 0{
                    targetFormat = format
                } else if dimensions.width == videoWidth {
                    targetFormat = format
                }
            }
        }
        print("target format is :\(targetDevice):\(targetFormat)")
        capturer.startCapture(with: targetDevice!,
                              format: targetFormat!,
                              fps: videoFps)
    } 
//

--

Regards,

Bhavani Chada

iOS Developer

ISTPL

Mobile:9948043146

Hyderabad

[John Mikelich]

I've found that the webrtc capture session starts before the app is technically foregrounded, so then the capture session remains un-started.

Try putting in the didEnterFG notification listener, grabbing the captureSession from webrtc, and starting it again.

For example get 

RTCCameraVideoCapturer *rtcCapturer

from the setup of ARDCaptureController, then after a short wait (like a second)

[rtcCapturer.captureSession startRunning]

[Bhavani Chada]

Thank you so much for your help.It is resolved.

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