长按拍摄时报错

[FieeA]

当我长按录制视频结束时报错:Error when stop recording video: CameraException(videoRecordingFailed, null),请问该如何解决呢.

flutter版本:1.17.5
dart版本:2.8.4
android版本:5.1

[AlexV525]

提供更多信息？

[FieeA]

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

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: InkWell(
          child: Text('拍摄'),
          onTap: () async {
            final AssetEntity entity = await CameraPicker.pickFromCamera(
                context,
                isAllowRecording: true,
                maximumRecordingDuration: Duration(seconds: 5));
            print(entity);
          },
        ),
      ),
    );
  }
}

这就是全部代码了,还需要其他什么信息吗?

[AlexV525]

更多的报错信息

[FieeA]

10-12 17:05:30.056 6627-6627/com.example.wechat_cam E/CameraDevice-0-LE: Surface with size (w=1920, h=1080) and format 0x1 is not valid, size not in valid set: [1280x960, 1280x720, 1052x780, 960x720, 960x540, 720x720, 864x480, 720x540, 800x480, 720x480, 768x432, 640x480, 576x432, 480x320, 384x288, 352x288, 320x240, 240x160, 208x144, 176x144, 160x120]
10-12 17:05:30.056 6627-6627/com.example.wechat_cam W/CameraDevice-JV-0: Stream configuration failed
10-12 17:05:30.056 6627-6627/com.example.wechat_cam E/CameraCaptureSession: Session 1: Failed to create capture session; configuration failed
10-12 17:05:32.896 6627-6627/com.example.wechat_cam E/MediaRecorder: stop called in an invalid state: 8

当我触发这个错误后,我又尝试单击拍摄按钮,遇到如下错误

10-12 17:06:41.076 6627-6627/com.example.wechat_cam E/MethodChannel#plugins.flutter.io/camera: Failed to handle method call
    java.lang.NullPointerException: Attempt to invoke virtual method 'int android.hardware.camera2.CameraCaptureSession.capture(android.hardware.camera2.CaptureRequest, android.hardware.camera2.CameraCaptureSession$CaptureCallback, android.os.Handler)' on a null object reference
        at io.flutter.plugins.camera.Camera.takePicture(Camera.java:242)
        at io.flutter.plugins.camera.MethodCallHandlerImpl.onMethodCall(MethodCallHandlerImpl.java:77)
        at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:226)
        at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:85)
        at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:631)
        at android.os.MessageQueue.nativePollOnce(Native Method)
        at android.os.MessageQueue.next(MessageQueue.java:143)
        at android.os.Looper.loop(Looper.java:122)
        at android.app.ActivityThread.main(ActivityThread.java:5593)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:960)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

希望这些对你有用

[AlexV525]

目前看起来是官方的camera的问题，试下官方camera的example是否正常

[AlexV525]

尝试降低一下 ResolutionPreset，看下有没有变化

[FieeA]

ResolutionPreset调成low,依然不可以

[AlexV525]

嗯，试下官方demo。

[FieeA]

淦...换了个手机就正常了,难道有什么东西不兼容旧设备吗

[AlexV525]

camera的问题还是很多，所以有些时候与它本身的质量有关...

[FieeA]

那就先这样吧,多谢多谢啊

[mrchenmo]

同样是camera插件的问题，It seems that this issue going to be fixed with this PR: flutter/plugins#3651好像有个PR解决了这个问题，不知道官方有没有合并进去。在某些手机上 Camera2的API不能用。补充一个相同 bug的 issue 链接 flutter/flutter#40519

[AlexV525]

我也在关注这个PR，PR本身质量不错，但原作者交付的过程太慢，有很多改进已经被拆分到其他地方完成了。

[mrchenmo]

我也在关注这个PR，PR本身质量不错，但原作者交付的过程太慢，有很多改进已经被拆分到其他地方完成了。

好的A少，升级下插件版本呗

[AlexV525]

好的A少，升级下插件版本呗

flutter pub upgrade 即可，新的使用者下载到的也是新版。