Camera fails is object is created dynamically

rahul3349

I'm trying to create Camera, VideoOutPut objects dynamically in QML, but getting error from gstreamer and not able to start camera preview.

Code:

function createPreviewObjects(parent, cameraId) {
    cam_component = Qt.createComponent("Camera.qml");
    camera = cam_component.createObject(cameraUI);
    if (camera == null) {
        // Error Handling
        console.log("Error creating video camera object");
        return;
    }
    camera.deviceId = cameraId;
    console.log("Camera component is created "+cameraId);


    preview_component = Qt.createComponent("Preview.qml");
    preview = preview_component.createObject(cameraUI);
    if (preview == null) {
        // Error Handling
        console.log("Error creating video preview object");
        return;
    }

    preview.width = parent.width;
    preview.height = parent.height;
    preview.x = 0;
    preview.y = 0;
    preview.source = camera;
    console.log("Preview component is created: "+camera);

Logs:

GstElement* CameraBinSession::buildCameraSource()
GstElement* CameraBinSession::buildCameraSource()
GstElement* CameraBinSession::buildCameraSource()
set camera device "/dev/video1"
GstElement* CameraBinSession::buildCameraSource()
GstElement* CameraBinSession::buildCameraSource()
GstElement* CameraBinSession::buildCameraSource()
virtual void CameraBinControl::setState(QCamera::State) ActiveState
void CamerabinResourcePolicy::setResourceSet(CamerabinResourcePolicy::ResourceSet) 2
void CameraBinSession::setState(QCamera::State) QCamera::ActiveState
GstElement* CameraBinSession::buildCameraSource()
bool CameraBinSession::setupCameraBin() Viewfinder changed, reconfigure.
Starting camera without viewfinder available
GstElement* CameraBinSession::buildCameraSource()
qml: Camera component is created /dev/video1
CameraBinControl: reload pipeline requested ActiveState
void CameraBinSession::setState(QCamera::State) QCamera::LoadedState
CameraBinControl: reload pipeline requested ActiveState
CameraBinControl: reload pipeline requested ActiveState
qml: Preview component is created: QDeclarativeCamera(0x569ad0)
process 2392: D-Bus library appears to be incorrectly set up; failed to read machine uuid: Failed to open "/etc/machine-id": No such file or directory
See the manual page for dbus-uuidgen to correct this issue.
CameraBinControl: reload pipeline
void CameraBinSession::setState(QCamera::State) QCamera::ActiveState
GstElement* CameraBinSession::buildCameraSource()
bool CameraBinSession::setupCameraBin() Viewfinder changed, reconfigure.

(declarative-camera:2392): GStreamer-CRITICAL **: gst_element_link_pads_full: assertion 'GST_IS_ELEMENT (src)' failed
*
(declarative-camera:2392): GStreamer-CRITICAL *: gst_object_unref: assertion 'object != NULL' failed
CameraBin error: "GStreamer error: negotiation problem."

install jpeg buffer probe
install metadata probe
install uncompressed buffer probe
"Camera bin: state changed: old: GST_STATE_NULL new: GST_STATE_READY pending: GST_STATE_VOID_PENDING"
"Camera bin: state changed: old: GST_STATE_READY new: GST_STATE_PAUSED pending: GST_STATE_PLAYING"
CameraBin error: "Internal data flow error."
CameraBin error: "Internal data flow error."