QCamera "GLib-GObject-CRITICAL" Error

Bamshad

Hello,

I have developed a simple application to record the video from laptop's camera. I've used the following classes:

#include <QCamera>
#include <QCameraInfo>
#include <QMediaRecorder>
#include <QUrl>
#include <QCameraViewfinder>
#include <QCameraImageCapture>

It works and it can show the video and I am able to still an image but, when I try to record a video using "QMediaRecorder" I face the following error:

(videoD:19102): GLib-GObject-CRITICAL **: 13:01:07.717: g_object_unref: assertion 'G_IS_OBJECT (object)' failed

The operation system is Ubuntu 18 and I have installed libpulse-dev.

I hope someone can help me.

SGaist

Hi,

What version of Qt ?
What version of GStreamer ?
How did you install both ?
Can you record from the camera if you use GStreamer directly ?

Bamshad

Hi,

the QT version is 5.9.5

In terms of GStreamer honestly I have newer used it before. Should I install it?

SGaist

If you didn't have GStreamer installed then you would not have anything on your GUI with regard to the camera.

Bamshad

I just checked it and It is 1.0 as far as I understood .

I used dpkg -l | grep gstreamer and I get list of packages:

i gir1.2-gstreamer-1.0:amd64 1.14.5-0ubuntu1~18.04.1 amd64 GObject introspection data for the GStreamer library
ii gstreamer1.0-alsa:amd64 1.14.5-0ubuntu1~18.04.1 amd64 GStreamer plugin for ALSA
ii gstreamer1.0-clutter-3.0:amd64 3.0.26-1 amd64 Clutter PLugin for GStreamer 1.0

....
...

SGaist

Is the Qt version you are using the one provided by your distribution ?