你也可以用ffmpeg包进行同样的操作，只是做：

class ClassName {
      final FlutterFFmpeg _flutterFFmpeg = new FlutterFFmpeg();
        ...
      void someFunction() {
        _flutterFFmpeg
            .getMediaInformation("<file path or uri>")
            .then((info) => print(info));
      }
    }

您可以使用视频控制器：

VideoPlayerController _controller = VideoPlayerController.network('https://flutter.github.io/assets-for-api-docs/assets/videos/bee.mp4')
      ..initialize().then((_) {
        // Ensure the first frame is shown after the video is initialized, even before the play button has been pressed.
      });

 Duration durationOfVideo = _controller.value.duration;