[video_player] Validate size only when assets contain video tracks on iOS (#4639)

Author: AlexV525

packages/video_player/video_player/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.2.12
+
+* iOS: Validate size only when assets contain video tracks.
+
 ## 2.2.11
 
 * Removes dependency on `meta`.

packages/video_player/video_player/example/assets/Audio.mp3

@@ -272,4 +272,68 @@ void main() {
       skip: !(kIsWeb || defaultTargetPlatform == TargetPlatform.android),
     );
   });
+
+  // Audio playback is tested to prevent accidental regression,
+  // but could be removed in the future.
+  group('asset audios', () {
+    setUp(() {
+      _controller = VideoPlayerController.asset('assets/Audio.mp3');
+    });
+
+    testWidgets('can be initialized', (WidgetTester tester) async {
+      await _controller.initialize();
+
+      expect(_controller.value.isInitialized, true);
+      expect(_controller.value.position, const Duration(seconds: 0));
+      expect(_controller.value.isPlaying, false);
+      // Due to the duration calculation accurancy between platforms,
+      // the milliseconds on Web will be a slightly different from natives.
+      // The audio was made with 44100 Hz, 192 Kbps CBR, and 32 bits.
+      expect(
+        _controller.value.duration,
+        Duration(seconds: 5, milliseconds: kIsWeb ? 42 : 41),
+      );
+    });
+
+    testWidgets('can be played', (WidgetTester tester) async {
+      await _controller.initialize();
+      // Mute to allow playing without DOM interaction on Web.
+      // See https://developers.google.com/web/updates/2017/09/autoplay-policy-changes
+      await _controller.setVolume(0);
+
+      await _controller.play();
+      await tester.pumpAndSettle(_playDuration);
+
+      expect(_controller.value.isPlaying, true);
+      expect(
+        _controller.value.position,
+        (Duration position) => position > const Duration(milliseconds: 0),
+      );
+    });
+
+    testWidgets('can seek', (WidgetTester tester) async {
+      await _controller.initialize();
+      await _controller.seekTo(const Duration(seconds: 3));
+
+      expect(_controller.value.position, const Duration(seconds: 3));
+    });
+
+    testWidgets('can be paused', (WidgetTester tester) async {
+      await _controller.initialize();
+      // Mute to allow playing without DOM interaction on Web.
+      // See https://developers.google.com/web/updates/2017/09/autoplay-policy-changes
+      await _controller.setVolume(0);
+
+      // Play for a second, then pause, and then wait a second.
+      await _controller.play();
+      await tester.pumpAndSettle(_playDuration);
+      await _controller.pause();
+      final Duration pausedPosition = _controller.value.position;
+      await tester.pumpAndSettle(_playDuration);
+
+      // Verify that we stopped playing after the pause.
+      expect(_controller.value.isPlaying, false);
+      expect(_controller.value.position, pausedPosition);
+    });
+  });
 }

packages/video_player/video_player/example/integration_test/video_player_test.dart

@@ -36,3 +36,4 @@ flutter:
     - assets/Butterfly-209.webm
     - assets/bumble_bee_captions.srt
     - assets/bumble_bee_captions.vtt
+    - assets/Audio.mp3

packages/video_player/video_player/example/pubspec.yaml

@@ -337,12 +337,14 @@ - (void)updatePlayingState {
 
 - (void)setupEventSinkIfReadyToPlay {
   if (_eventSink && !_isInitialized) {
+    BOOL hasVideoTracks =
+        [[self.player.currentItem.asset tracksWithMediaType:AVMediaTypeVideo] count] != 0;
     CGSize size = [self.player currentItem].presentationSize;
     CGFloat width = size.width;
     CGFloat height = size.height;
 
-    // The player has not yet initialized.
-    if (height == CGSizeZero.height && width == CGSizeZero.width) {
+    // The player has not yet initialized when it contains video tracks.
+    if (hasVideoTracks && height == CGSizeZero.height && width == CGSizeZero.width) {
       return;
     }
     // The player may be initialized but still needs to determine the duration.
@@ -375,7 +377,10 @@ - (int64_t)position {
 }
 
 - (int64_t)duration {
-  return FLTCMTimeToMillis([[_player currentItem] duration]);
+  // Note: https://openradar.appspot.com/radar?id=4968600712511488
+  // `[AVPlayerItem duration]` can be `kCMTimeIndefinite`,
+  // use `[[AVPlayerItem asset] duration]` instead.
+  return FLTCMTimeToMillis([[[_player currentItem] asset] duration]);
 }
 
 - (void)seekTo:(int)location {

packages/video_player/video_player/ios/Classes/FLTVideoPlayerPlugin.m

@@ -3,7 +3,7 @@ description: Flutter plugin for displaying inline video with other Flutter
   widgets on Android, iOS, and web.
 repository: https://github.com/flutter/plugins/tree/master/packages/video_player/video_player
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+video_player%22
-version: 2.2.11
+version: 2.2.12
 
 environment:
   sdk: ">=2.14.0 <3.0.0"