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video_player platform implementation for flutter-pi.

flutterpi_gstreamer_video_player #

A video player implementation for flutter-pi.

Note this only works on a Raspberry Pi with flutter-pi and gstreamer installed, not on any other platform, even though though platform tags of the pub-web.flutter-io.cn package may seem to suggest otherwise.

Example usage #

To use this package in your app, execute FlutterpiVideoPlayer.registerWith() in main, before the runApp call. Ideally you only do this when you're sure the platform code is present.

Example code:

void main() {
    FlutterpiVideoPlayer.registerWith()
    runApp(MyApp());
}

Then you just use the widgets/classes of the official video_player package. chewie is good for more high-level playback.

Advanced features #

In addition to what the official video_player package provides, this video player implementation has some additional features that might be interesting. The advanced features are also used in the example.

1. Playing raw gstreamer pipelines #

You can create a VideoPlayerController using a raw gstreamer pipeline, like here:

@override
void initState() {
    _controller = _FlutterpiVideoPlayerController.withGstreamerPipeline('libcamerasrc ! queue ! appsink name="sink"');
    super.initState();
}

In this case the video player will show the camera preview using libcamera.

2. Single-frame stepping #

You can step through the video playback. When stepForward or stepBackward is called, the video playback will pause. I.e. you need to call _controller.play() again to resume it.

late VideoPlayerController _controller;

@override
void initState() {
    _controller = VideoPlayerController.network(
      'https://flutter.github.io/assets-for-api-docs/assets/videos/bee.mp4',
    );
    super.initState();
}

void stepForward() {
    _controller.stepForward();
}

void stepBackward() {
    _controller.stepBackward();
}

3. Fast seeking #

You can seek to the nearest keyframe instead, which is way faster than seeking to an exact position.

late VideoPlayerController _controller;

@override
void initState() {
    _controller = VideoPlayerController.network(
      'https://flutter.github.io/assets-for-api-docs/assets/videos/bee.mp4',
    );
    super.initState();
}

void doFastSeek() {
    _controller.fastSeek(Duration(seconds: 5));
}