Flutter 颤振：如何使用ffmpeg从视频中读取数据

我正在尝试使用lib从视频中获取元数据

下面的代码不适用于ffmpeg

  Directory appDocDir = await getApplicationDocumentsDirectory();
  String appDocPath = appDocDir.path;
  File file = File('{$appDocPath}/folder_name/out.mp4');
  final FlutterFFprobe _flutterFFprobe = new FlutterFFprobe();

 _flutterFFprobe.getMediaInformation(file.path).then((info) => print(info));

---

如何解决上述问题？

首先需要对文件进行存储访问，然后才能访问ffmpeg lib的给定路径

添加存储权限

permission_handler: ^5.0.1 // in pubspec.yaml file

在访问视频之前请求运行时权限

    var status = await Permission.storage.status;
          if (status.isUndetermined) {
            // You can request multiple permissions at once.
            Map<Permission, PermissionStatus> statuses = await [
              Permission.storage,
            ].request();
            print(statuses[Permission.storage]); // this must show permission granted. 
          }

如何获取封面图像（相册艺术）和音频文件的其他属性，如艺术家姓名、歌曲名称、音频文件的总时间长度等？请帮忙，我被困在这个问题上两个星期了，我在堆栈上发布了问题，但社区没有回应。

          File file = File('/storage/emulated/0/folder_name/out.mp4');
          final FlutterFFprobe _flutterFFprobe = new FlutterFFprobe();

          _flutterFFprobe
              .getMediaInformation(file.path)
              .then((info) => print(info)); // This should print metadata inside of video