[iOS] stop capture RTCVideoSource if it been opened before

artsector · artsector · commit ad572b66319b · 2020-04-17T14:19:56.000+03:00
for more details see the conversation - flutter-webrtc#228
diff --git a/ios/Classes/FlutterRTCMediaStream.m b/ios/Classes/FlutterRTCMediaStream.m
@@ -291,6 +291,9 @@ - (void)getUserVideo:(NSDictionary *)constraints
     
     if (videoDevice) {
         RTCVideoSource *videoSource = [self.peerConnectionFactory videoSource];
+        if (self.videoCapturer) {
+            [self.videoCapturer stopCapture];
+        }
         self.videoCapturer = [[RTCCameraVideoCapturer alloc] initWithDelegate:videoSource];
         AVCaptureDeviceFormat *selectedFormat = [self selectFormatForDevice:videoDevice];
         NSInteger selectedFps = [self selectFpsForFormat:selectedFormat];
