QCameraInfo::availableCameras() doesn not show list f webcames

nimaaghli

I want to list device names or device ids of web cams connected over usb to my ubuntu i tried this code but its not showing anything and its always empty


QList<QCameraInfo> cameras = QCameraInfo::availableCameras();
foreach (const QCameraInfo &cameraInfo, cameras)
    qDebug() << cameraInfo.deviceName();

can anyone help me how to make it work ? I have Ubuntu 12.04 and Qt5.5 and tried 3 different web cams non of them was detected

SGaist

Hi and welcome to devnet,

What version of GStreamer do you have installed on your system ?

nimaaghli

Hi,
Thanks For your answer.

Runing gstreamer-properties in command line gives me this :

(gstreamer-properties:3473): Gtk-WARNING **: Unknown property: GtkDialog.has-separator
(gstreamer-properties:3473): Gtk-WARNING **: Unknown property: GtkDialog.has-separator
gstreamer-properties-Message: Skipping unavailable plugin 'artsdsink'
gstreamer-properties-Message: Skipping unavailable plugin 'esdsink'
gstreamer-properties-Message: Skipping unavailable plugin 'sunaudiosink'
gstreamer-properties-Message: Skipping unavailable plugin 'glimagesink'
gstreamer-properties-Message: Skipping unavailable plugin 'v4lmjpegsrc'
gstreamer-properties-Message: Skipping unavailable plugin 'qcamsrc'
gstreamer-properties-Message: Skipping unavailable plugin 'v4lsrc'
gstreamer-properties-Message: Skipping unavailable plugin 'esdmon'
gstreamer-properties-Message: Skipping unavailable plugin 'sunaudiosrc'

I have gstreamer-0.10

When the GUI of gstream comes up i can see my USB webcam in list of devices and the only plugin to select is v4l2 when pressing test button i get the stream but very low framerate.
And

    QList<QCameraInfo> cameras = QCameraInfo::availableCameras();

    foreach (const QCameraInfo &cameraInfo, cameras)
        qDebug() << cameraInfo.deviceName()

Returns nothing

SGaist

Do you also have the GStreamer plugins installed ?