Update.

cloudwebrtc · cloudwebrtc · commit dd7e45db3b0b · 2019-01-20T22:10:02.000+08:00
diff --git a/ios/Classes/FlutterRPScreenRecorder.m b/ios/Classes/FlutterRPScreenRecorder.m
@@ -4,10 +4,12 @@
 //See: https://developer.apple.com/videos/play/wwdc2017/606/
 
 @implementation FlutterRPScreenRecorder {
-	RPScreenRecorder * screenRecorder;
+	RPScreenRecorder *screenRecorder;
+	RTCVideoSource *source;
 }
 
 - (instancetype)initWithDelegate:(__weak id<RTCVideoCapturerDelegate>)delegate {
+    source = delegate;
     return [super initWithDelegate:delegate];
 }
 
@@ -53,6 +55,11 @@ -(void)handleSourceBuffer:(CMSampleBufferRef)sampleBuffer sampleType:(RPSampleBu
         return;
     }
     
+    size_t width = CVPixelBufferGetWidth(pixelBuffer);
+    size_t height = CVPixelBufferGetHeight(pixelBuffer);
+
+    [source adaptOutputFormatToWidth:width/2 height:height/2 fps:8];
+    
     RTCCVPixelBuffer *rtcPixelBuffer = [[RTCCVPixelBuffer alloc] initWithPixelBuffer:pixelBuffer];
     int64_t timeStampNs =
     CMTimeGetSeconds(CMSampleBufferGetPresentationTimeStamp(sampleBuffer)) * NSEC_PER_SEC;
diff --git a/ios/Classes/FlutterRTCMediaStream.m b/ios/Classes/FlutterRTCMediaStream.m
@@ -404,8 +404,6 @@ -(void)getDisplayMedia:(NSDictionary *)constraints
     RTCVideoSource *videoSource = [self.peerConnectionFactory videoSource];
     FlutterRPScreenRecorder *screenCapturer = [[FlutterRPScreenRecorder alloc] initWithDelegate:videoSource];
     
-    [videoSource adaptOutputFormatToWidth:(NSUInteger)[UIScreen mainScreen].bounds.size.width height:(NSUInteger)[UIScreen mainScreen].bounds.size.height fps:self._targetFps];
-    
     [screenCapturer startCapture];
     
     //TODO:
