video_player插件无法播放视频-颤振

Question

我将颤振更新到1.22.0，现在我的video_player给了我异常错误。在我将颤振升级到1.22.0之前，它运行得很好。

以下是我的错误：

'package:flutter/src/services/message_codec.dart'：E/

( 8545)：错误:flutter/lib/ui/ui_dart_state.cc(177)未处理异常：失败断言:第111行pos 15：'code != null'：不是真。E/颤振( 8545)：#0

_AssertionError._doThrowNew (飞镖:核心补丁/错误补丁:46:39)E/颤振(85 45)：#1 _AssertionError._throwNew (飞镖:核心补丁/错误补丁:36:5)E/颤振(85 45)：#2

新(package:flutter/src/services/message_codec.dart:111:15) E/颤振(85 45)：#3 VideoPlayerApi.create (package:video_player_platform_interface/messages.dart:205:13) E/颤振(85 45)：E/颤振(85 45)：#4

(package:video_player_platform_interface/method_channel_video_player.dart:46:42) E/颤振(85 45)：#5 VideoPlayerController.initialize (package:video_player/video_player.dart:275:45) E/颤振(85 45)：#6 _ScreenBackgroundVideoState.initState (package:flow/widget/background/screen_background_video.dart:17:9) E/颤振(85 45)：#7 StatefulElement._firstBuild (软件包:flutter/src/widget/)E/颤振(85 45)：#8 (package:flutter/src/widgets/framework.dart:4601:5) E/颤振(85 45)：#9 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3569:14) E/颤振(85 45)：#10 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6236:32) E/颤振(85 45)：#11 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3569:14) E/颤振(85 45)：#12 Element.updateChild (package:flutter/src/widgets/framework.dart:3327:18) E/颤振(85 45)：#13 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6118:14) E/颤振(85 45)：#14 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3569:14) E/颤振(85 45)：#15 (package:flutter/src/widgets/framework.dart:3327:18) E/颤振(85 45)：#16 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4652:16) E/颤振(85 45)：#17 Element.rebuild (package:flutter/src/widgets/framework.dart:4343:5) E/颤振(85 45)：#18 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4606:5)E/颤振(85 45)：#19 (package:flutter/src/widgets/framework.dart:4601:5) E/ ComponentElement.mount (85 45)：#20 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3327:18) E/颤振(85 45)：#21 Element.updateChild (package:flutter/src/widgets/framework.dart:3327:18)E/颤振(85 45)：#22 SingleChildRenderObjectElement.mount (封装:flutter/src/widget)E/颤振(85 45)：#23 (package:flutter/src/widgets/framework.dart:3569:14) E/颤振(85 45)：#24 Element.updateChild (package:flutter/src/widgets/framework.dart:3327:18) E/颤振(85 45)：#25 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6118:14) E/颤振(85 45)：#26 Element.inflateWidget(package:flutter/src/widgets/framework.dart:3569:14) E/颤振(85 45)：#27 Element.updateChild (package:flutter/src/widgets/framework.dart:3327:18) E/颤振(85 45)：#28 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6118:14) E/颤振(85 45)：#29 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3569:14) E/颤振(85 45)：#30 (package:flutter/src/widgets/framework.dart:3327:18) E/颤振(85 45)：#31 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6118:14) E/颤振(85 45)：#32 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3569:14) E/颤振(85 45)：#33 Element.updateChild (package:flutter/src/widgets/framework.dart:3327:18)E/颤振(85 45)：#34 (package:flutter/src/widgets/framework.dart:4652:16) E/颤振(85 45)：#35 Element.rebuild (package:flutter/src/widgets/framework.dart:4343:5) E/颤振(85 45)：#36 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4606:5) E/颤振(85 45)：#37 ComponentElement.mount (包装:Element.rebuild/src/widgets/Frawork.Dart:4601:5)E/ (package:flutter/src/widgets/framework.dart:3327:18) ( 8545)：#38 Element.inflateWidget (package:flutter/src/widgets/framework.dart:6118:14) E/颤振(85 45)：#39 Element.updateChild (package:flutter/src/widgets/framework.dart:6118:14)E/颤振(85 45)：#40 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6118:14)E/颤振(85 45)：#41元素。(package:flutter/src/widgets/framework.dart:3569:14) E/颤振(85 45)：#42 Element.updateChild (package:flutter/src/widgets/framework.dart:3327:18) E/颤振(85 45)：#43 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4652:16)

这是我的代码：

import 'package:flutter/material.dart';
import 'package:video_player/video_player.dart';

class ScreenBackgroundVideo extends StatefulWidget {
  @override
  _ScreenBackgroundVideoState createState() => _ScreenBackgroundVideoState();
}

class _ScreenBackgroundVideoState extends State<ScreenBackgroundVideo> {
  VideoPlayerController _controller;

  @override
  void initState() {
    super.initState();
    _controller = VideoPlayerController.asset('assets/vid/login.mp4')
      // set background video using assets for login screen
      ..initialize().then((_) {
        // Ensure the first frame is shown after the video is initialized, even before the play button has been pressed.
        setState(() {});
      }); // background video will play as soon as the splashscreen is closed
    _controller.play();
    _controller
        .setLooping(true); // looping set to true for the background video
    _controller.setVolume(0); // volume set to 0 for background video
  }

  @override
  void dispose() {
    super.dispose();
    // TODO: implement dispose
    _controller.dispose(); // Dispose the controller after play is done.
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      child: _controller.value.initialized
          ? AspectRatio(
              aspectRatio: _controller.value.aspectRatio,
              child: VideoPlayer(_controller),
            )
          : Container(),
    );
  }
}

需要帮助才能解决这个问题。

Answer 1

为了让我的video_player工作，我不得不将我的颤振版本降到1.20.2。

如果有其他解决办法，请告诉我。

Answer 2

或者，如果您没有在视频播放器插件中使用任何新功能，则可以将视频播放器降级为0.10.11+2，而不是降级颤振。

您可以在这里找到更多详细信息：https://github.com/flutter/flutter/issues/66627

Answer 3

同样的问题--我刚刚升级了颤振版本1.22.5，它起了作用