Qml Webcam Integration

melih16

Hello, I want to monitoring my webcam screen on my UI. I am using jetson nano ubuntu pc and I didn't make that. I can select the webcams but webcam's screen does not appear on my UI.
This is my qml part.
/ Camera view container
Rectangle {
id: viewfinder
anchors.fill: parent
color: "black"

    MediaDevices {
        id: mediaDevices
    }
    
    CaptureSession {
        id: captureSession
        camera: Camera {
            id: camera
            // Activate the camera when isActive is true
            active: root.isActive
            onErrorOccurred: {
                console.error("Camera error:", errorString)
                root.error(errorString)
            }
            onActiveChanged: {
                console.log("Camera active changed:", active)
            }
        }
        videoOutput: VideoOutput {
            id: videoOutput
            anchors.fill: parent
            fillMode: VideoOutput.PreserveAspectFit
            onSourceRectChanged: {
                console.log("Video source rect changed:", sourceRect)
                if (sourceRect.width > 0 && sourceRect.height > 0) {
                    busyIndicator.running = false
                }
            }
        }
    }

and this is my .py part
@Slot(str, result=bool)
def start_camera(self, device_id):
"""Start the selected camera using Qt Multimedia."""
try:
print(f"Attempting to start Qt camera with ID: {device_id}")
self.cleanup_camera()
return self._start_qt_camera(device_id)
except Exception as e:
print(f"Error starting camera: {str(e)}")
return False

def _start_qt_camera(self, device_id):
    """Internal method to start the camera via Qt Multimedia."""
    try:
        devices = QMediaDevices()
        available_cameras = devices.videoInputs()
        print(f"Available cameras: {[cam.description() for cam in available_cameras]}")  # Debug log
        camera_info = None
        for cam in available_cameras:
            if cam.id().data().decode() == device_id:
                camera_info = cam
                break
        if camera_info:
            print(f"Starting camera: {camera_info.description()}")  # Debug log
            self.current_camera = QCamera(camera_info)
            self.current_camera.start()
            import time
            time.sleep(0.5)
            if self.current_camera.isActive():
                print("Camera is active.")  # Debug log
                self.capture_session = QMediaCaptureSession()
                self.capture_session.setCamera(self.current_camera)
                self.image_capture = QImageCapture()
                self.capture_session.setImageCapture(self.image_capture)
                self.image_capture.imageSaved.connect(
                    lambda id, path: self.imageSaved.emit(path)
                )
                return True
            else:
                print("Camera is not active after starting.")  # Debug log
        else:
            print("No matching camera found.")  # Debug log
        return False
    except Exception as e:
        print(f"Error starting Qt camera: {str(e)}")
        return False!![ss.png](https://ddgobkiprc33d.cloudfront.net/dd84827d-d163-4193-9d34-1985bfa662e0.png)

Disconnected is not important, it is not related to webcam in screenshoot.