Update.

cloudwebrtc · cloudwebrtc · commit 66b9b10192c7 · 2018-12-27T00:33:00.000+08:00
diff --git a/ios/Classes/FlutterRTCMediaStream.m b/ios/Classes/FlutterRTCMediaStream.m
@@ -399,13 +399,13 @@ - (void)requestAccessForMediaType:(NSString *)mediaType
 -(void)getDisplayMedia:(NSDictionary *)constraints
                 result:(FlutterResult)result {
     NSString *mediaStreamId = [[NSUUID UUID] UUIDString];
-    RTCMediaStream *mediaStream
-    = [self.peerConnectionFactory mediaStreamWithStreamId:mediaStreamId];
+    RTCMediaStream *mediaStream = [self.peerConnectionFactory mediaStreamWithStreamId:mediaStreamId];
     
     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:30];
+    
     [screenCapturer startCapture];
     
     //TODO: Unified interface
@@ -415,7 +415,6 @@ -(void)getDisplayMedia:(NSDictionary *)constraints
     RTCVideoTrack *videoTrack = [self.peerConnectionFactory videoTrackWithSource:videoSource trackId:trackUUID];
     [mediaStream addVideoTrack:videoTrack];
     
-    
     NSMutableArray *audioTracks = [NSMutableArray array];
     NSMutableArray *videoTracks = [NSMutableArray array];
     
