How to record video using QGraphicsView with Overlay text?

[nikita.panchal09]

Hi,

I want to overlay text on Live video and record video with overlay text. I have tried two ways as per below but not succeed.

1. Using QGraphicsView:
   Problem: Unable to find a way to record video using QGraphicsView.

   *QList<QCameraInfo> cameras = QCameraInfo::availableCameras();
   foreach (const QCameraInfo &cameraInfo, cameras)
   {
   if (cameraInfo.deviceName() == "/dev/video0")
   pCamera = new QCamera(cameraInfo, this);
   }

   QGraphicsVideoItem *videoItem = new QGraphicsVideoItem;
   scene = new QGraphicsScene(this);
   graphicsView = new QGraphicsView(scene);

   scene->addItem(videoItem);
   text = scene->addText("Hello World"); //Text Overlay
   scene->addItem(text);

   pCamera->setViewfinder(videoItem);
   QVBoxLayout *cBox2 = new QVBoxLayout();
   cBox2->addWidget(graphicsView);
   cBox2->setSpacing(0);

   ui->scrollArea->setLayout(cBox2);

   pMediaRecorder = new QMediaRecorder(pCamera);
   updateRecorderState(pMediaRecorder->state());
   connect(pMediaRecorder, SIGNAL(stateChanged(QMediaRecorder::State)), this, SLOT(updateRecorderState(QMediaRecorder::State)));

   if (pCamera->isCaptureModeSupported(QCamera::CaptureVideo))
   pCamera->setCaptureMode(QCamera::CaptureVideo);
   pMediaRecorder->setOutputLocation(QUrl::fromLocalFile(DATA_STORE_LOCATION"sample.mp4"));
   pMediaRecorder->record();*

   It is not recording video with overlay text.

2. Using CameraViewfinder:
   Problem: Unable to find a way to add overlay and perform zoom Operations.

   *QList<QCameraInfo> cameras = QCameraInfo::availableCameras();
   foreach (const QCameraInfo &cameraInfo, cameras)
   {
   if (cameraInfo.deviceName() == "/dev/video0")
   pCamera = new QCamera(cameraInfo, this);
   }

   pCameraViewfinder = new QCameraViewfinder(this);
   pCameraImageCapture = new QCameraImageCapture(pCamera, this);
   pVBoxLayout = new QVBoxLayout();

   //Set Camera View
   pCamera->setViewfinder(pCameraViewfinder);
   pVBoxLayout->addWidget(pCameraViewfinder);
   ui->scrollArea->setLayout(pVBoxLayout);

   pMediaRecorder = new QMediaRecorder(pCamera);
   updateRecorderState(pMediaRecorder->state());
   connect(pMediaRecorder, SIGNAL(stateChanged(QMediaRecorder::State)), this, SLOT(updateRecorderState(QMediaRecorder::State)));

   if (pCamera->isCaptureModeSupported(QCamera::CaptureVideo))
   pCamera->setCaptureMode(QCamera::CaptureVideo);
   pMediaRecorder->setOutputLocation(QUrl::fromLocalFile(DATA_STORE_LOCATION"sample.mp4"));
   pMediaRecorder->record();*

Looking to hearing from you.

Thanks,
Nikita Panchal