我正在尝试从 DJI 获取相机并使用 OpenCV，问题取决于如何设置 OpenCv 以获取 DJI 在无人机处于活动状态时录制的视频预览器。无人机实际上正在将视频流式传输到我的手机，但是当我尝试使用我的 OpenCV 代码从我在 Android Studio 中的项目布局中获取视频预览 id 时，每次我尝试去应用程序的相机视图部分。这是我用来将 OpenCv 对象初始化为 DJI 相机捕获的视频预览器的代码。
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.activity_main);
openCvCameraView = (JavaCameraView)findViewById(R.id.video_previewer_surface);
openCvCameraView.setVisibility(SurfaceView.VISIBLE);
openCvCameraView.setCvCameraViewListener(this);
initUI();
// The callback for receiving the raw H264 video data for camera live view
mReceivedVideoDataCallBack = new CameraReceivedVideoDataCallback() {
@Override
public void onResult(byte[] videoBuffer, int size) {
if(mCodecManager != null){
// Send the raw H264 video data to codec manager for decoding
mCodecManager.sendDataToDecoder(videoBuffer, size);
}else {
Log.e(TAG, "mCodecManager is null");
}
}
};
DJICamera camera = FPVDemoApplication.getCameraInstance();
if (camera != null) {
camera.setDJICameraUpdatedSystemStateCallback(new DJICamera.CameraUpdatedSystemStateCallback() {
@Override
public void onResult(CameraSystemState cameraSystemState) {
if (null != cameraSystemState) {
int recordTime = cameraSystemState.getCurrentVideoRecordingTimeInSeconds();
int minutes = (recordTime % 3600) / 60;
int seconds = recordTime % 60;
final String timeString = String.format("%02d:%02d", minutes, seconds);
final boolean isVideoRecording = cameraSystemState.isRecording();
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
recordingTime.setText(timeString);
/*
* Update recordingTime TextView visibility and mRecordBtn's check state
*/
if (isVideoRecording){
recordingTime.setVisibility(View.VISIBLE);
}else
{
recordingTime.setVisibility(View.INVISIBLE);
}
}
});
}
}
});
}
}