Question

在Windows SDK 0.2.0上运行良好，我能够控制无人机并获得FPV。我意识到发布了新版本的SDK，并尝试了它。我发现最新的SDK仅支持移动命令，即使DJI提供了示例代码，我也无法从无人机中获取任何视频数据。谁能告诉我如何使用此SDK恢复视频反馈？

这是git示例代码：

public sealed partial class FPVPage : Page
{
    private DJIVideoParser.Parser videoParser;

    public FPVPage()
    {
        this.InitializeComponent();
    }

    protected override async void OnNavigatedTo(NavigationEventArgs e)
    {
        base.OnNavigatedFrom(e);
        InitializeVideoFeedModule();
        await DJI.WindowsSDK.DJISDKManager.Instance.ComponentManager.GetCameraHandler(0, 0).SetCameraWorkModeAsync(new CameraWorkModeMsg { value = CameraWorkMode.SHOOT_PHOTO });
    }

    protected override void OnNavigatedFrom(NavigationEventArgs e)
    {
        base.OnNavigatedTo(e);
        UninitializeVideoFeedModule();
    }


    private async void InitializeVideoFeedModule()
    {
        //Must in UI thread
        await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async () =>
        {
            //Raw data and decoded data listener
            if (videoParser == null)
            {
                videoParser = new DJIVideoParser.Parser();
                videoParser.Initialize(delegate (byte[] data)
                {
                    //Note: This function must be called because we need DJI Windows SDK to help us to parse frame data.
                    return DJISDKManager.Instance.VideoFeeder.ParseAssitantDecodingInfo(0, data);
                });
                //Set the swapChainPanel to display and set the decoded data callback.
                videoParser.SetSurfaceAndVideoCallback(0, 0, swapChainPanel, ReceiveDecodedData);
                DJISDKManager.Instance.VideoFeeder.GetPrimaryVideoFeed(0).VideoDataUpdated += OnVideoPush;
            }
            //get the camera type and observe the CameraTypeChanged event.
            DJISDKManager.Instance.ComponentManager.GetCameraHandler(0, 0).CameraTypeChanged += OnCameraTypeChanged;
            var type = await DJISDKManager.Instance.ComponentManager.GetCameraHandler(0, 0).GetCameraTypeAsync();
            OnCameraTypeChanged(this, type.value);
        });
    }


    private void UninitializeVideoFeedModule()
    {
        if (DJISDKManager.Instance.SDKRegistrationResultCode == SDKError.NO_ERROR)
        {
            videoParser.SetSurfaceAndVideoCallback(0, 0, null, null);
            DJISDKManager.Instance.VideoFeeder.GetPrimaryVideoFeed(0).VideoDataUpdated -= OnVideoPush;
        }
    }

    //raw data
    void OnVideoPush(VideoFeed sender, byte[] bytes)
    {
        videoParser.PushVideoData(0, 0, bytes, bytes.Length);
    }

    //Decode data. Do nothing here. This function would return a bytes array with image data in RGBA format.
    async void ReceiveDecodedData(byte[] data, int width, int height)
    {
    }

    //We need to set the camera type of the aircraft to the DJIVideoParser. After setting camera type, DJIVideoParser would correct the distortion of the video automatically.
    private void OnCameraTypeChanged(object sender, CameraTypeMsg? value)
    {
        if (value != null)
        {
            switch (value.Value.value)
            {
                case CameraType.MAVIC_2_ZOOM:
                    this.videoParser.SetCameraSensor(AircraftCameraType.Mavic2Zoom);
                    break;
                case CameraType.MAVIC_2_PRO:
                    this.videoParser.SetCameraSensor(AircraftCameraType.Mavic2Pro);
                    break;
                default:
                    this.videoParser.SetCameraSensor(AircraftCameraType.Others);
                    break;
            }

        }
    }

}

Answer 1

DJI技术团队迅速上传了新版本的sdk（0.3.1），问题已解决

无法使用最新的Windows SDK在MavicAir 2上使用VideoFeed

1 个答案: