Enable access to the video size

packages/video_player/android/src/main/java/io/flutter/videoplayer/VideoPlayerPlugin.java

@@ -152,6 +152,8 @@ private void sendInitialized() {
         Map<String, Object> event = new HashMap<>();
         event.put("event", "initialized");
         event.put("duration", mediaPlayer.getDuration());
+        event.put("width", mediaPlayer.getVideoWidth());
+        event.put("height", mediaPlayer.getVideoHeight());
         eventSink.success(event);
       }
     }

packages/video_player/example/lib/main.dart

@@ -255,12 +255,7 @@ class VideoInListOfCards extends StatelessWidget {
                   alignment: FractionalOffset.bottomRight +
                       const FractionalOffset(-0.1, -0.1),
                   children: <Widget>[
-                    new Center(
-                      child: new AspectRatio(
-                        aspectRatio: 3 / 2,
-                        child: new VideoPlayPause(controller),
-                      ),
-                    ),
+                    new AspectRatioVideo(controller),
                     new Image.asset('assets/flutter-mark-square-64.png'),
                   ]),
             ],
@@ -276,19 +271,49 @@ class VideoInListOfCards extends StatelessWidget {
   }
 }
 
-class FullScreenVideo extends StatelessWidget {
+class AspectRatioVideo extends StatefulWidget {
   final VideoPlayerController controller;
 
-  FullScreenVideo(this.controller);
+  AspectRatioVideo(this.controller);
+
+  @override
+  AspectRatioVideoState createState() => new AspectRatioVideoState();
+}
+
+class AspectRatioVideoState extends State<AspectRatioVideo> {
+  VideoPlayerController get controller => widget.controller;
+  bool initialized = false;
+
+  VoidCallback listener;
+
+  @override
+  void initState() {
+    super.initState();
+    listener = () {
+      if (!mounted) {
+        return;
+      }
+      if (initialized != controller.value.initialized) {
+        initialized = controller.value.initialized;
+        setState(() {});
+      }
+    };
+    controller.addListener(listener);
+  }
 
   @override
   Widget build(BuildContext context) {
-    return new Center(
-      child: new AspectRatio(
-        aspectRatio: 3 / 2,
-        child: new VideoPlayPause(controller),
-      ),
-    );
+    if (initialized) {
+      final Size size = controller.value.size;
+      return new Center(
+        child: new AspectRatio(
+          aspectRatio: size.width / size.height,
+          child: new VideoPlayPause(controller),
+        ),
+      );
+    } else {
+      return new Container();
+    }
   }
 }
 
@@ -313,7 +338,7 @@ void main() {
               new PlayerLifeCycle(
                 'http://www.sample-videos.com/video/mp4/720/big_buck_bunny_720p_20mb.mp4',
                 (BuildContext context, VideoPlayerController controller) =>
-                    new FullScreenVideo(controller),
+                    new AspectRatioVideo(controller),
               ),
               new PlayerLifeCycle(
                   'http://www.sample-videos.com/video/mp4/720/big_buck_bunny_720p_20mb.mp4',

packages/video_player/ios/Classes/VideoPlayerPlugin.m

@@ -173,7 +173,13 @@ - (void)updatePlayingState {
 
 - (void)sendInitialized {
   if (_eventSink && _isInitialized) {
-    _eventSink(@{ @"event" : @"initialized", @"duration" : @([self duration]) });
+    CGSize size = [self.player currentItem].presentationSize;
+    _eventSink(@{
+      @"event" : @"initialized",
+      @"duration" : @([self duration]),
+      @"width" : @(size.width),
+      @"height" : @(size.height),
+    });
   }
 }
 

packages/video_player/lib/video_player.dart

@@ -39,9 +39,11 @@ class VideoPlayerValue {
   final bool isLooping;
   final double volume;
   final String errorDescription;
+  final Size size;
 
   VideoPlayerValue({
     @required this.duration,
+    this.size,
     this.position: const Duration(),
     this.buffered: const <DurationRange>[],
     this.isPlaying: false,
@@ -57,9 +59,11 @@ class VideoPlayerValue {
 
   bool get initialized => duration != null;
   bool get isErroneous => errorDescription != null;
+  double get aspectRatio => size.width / size.height;
 
   VideoPlayerValue copyWith({
     Duration duration,
+    Size size,
     Duration position,
     List<DurationRange> buffered,
     bool isPlaying,
@@ -69,6 +73,7 @@ class VideoPlayerValue {
   }) {
     return new VideoPlayerValue(
       duration: duration ?? this.duration,
+      size: size ?? this.size,
       position: position ?? this.position,
       buffered: buffered ?? this.buffered,
       isPlaying: isPlaying ?? this.isPlaying,
@@ -82,6 +87,7 @@ class VideoPlayerValue {
   String toString() {
     return '$runtimeType('
         'duration: $duration, '
+        'size: $size, '
         'position: $position, '
         'buffered: [${buffered.join(', ')}], '
         'isplaying: $isPlaying, '
@@ -134,6 +140,7 @@ class VideoPlayerController extends ValueNotifier<VideoPlayerValue> {
       if (event["event"] == "initialized") {
         value = value.copyWith(
           duration: new Duration(milliseconds: event["duration"]),
+          size: new Size(event["width"].toDouble(), event["height"].toDouble()),
         );
         _applyLooping();
         _applyVolume();
@@ -168,6 +175,7 @@ class VideoPlayerController extends ValueNotifier<VideoPlayerValue> {
     if (_creatingCompleter != null) {
       await _creatingCompleter.future;
       if (!isDisposed) {
+        isDisposed = true;
         timer?.cancel();
         await _eventSubscription?.cancel();
         await _channel.invokeMethod(
@@ -218,7 +226,13 @@ class VideoPlayerController extends ValueNotifier<VideoPlayerValue> {
       timer = new Timer.periodic(
         const Duration(milliseconds: 500),
         (Timer timer) async {
+          if (isDisposed) {
+            return;
+          }
           final Duration newPosition = await position;
+          if (isDisposed) {
+            return;
+          }
           value = value.copyWith(position: newPosition);
         },
       );