[Interest] QCamera | Qt 5.7 | MultimediaWidgets::Camera example.

[Igor Mironchik]

Hi,

I try to start camera example in multimediawidgets, but all my cameras 
failed to start with "No camera source available" error. I'm on Linux 
with Qt 5.7.

Is it known bug, or I missed something on my system?

In app's output I see:

(camera:7876): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(camera:7876): GLib-GObject-CRITICAL **: g_signal_connect_data: 
assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

(camera:7876): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(camera:7876): GLib-GObject-CRITICAL **: g_signal_connect_data: 
assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

(camera:7876): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(camera:7876): GLib-GObject-CRITICAL **: g_signal_connect_data: 
assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

(camera:7876): GStreamer-CRITICAL **: gst_object_ref_sink: assertion 
'GST_IS_OBJECT (object)' failed

(camera:7876): GStreamer-CRITICAL **: gst_element_get_bus: assertion 
'GST_IS_ELEMENT (element)' failed

(camera:7876): GStreamer-CRITICAL **: gst_bus_add_watch_full: assertion 
'GST_IS_BUS (bus)' failed

(camera:7876): GStreamer-CRITICAL **: gst_bus_set_sync_handler: 
assertion 'GST_IS_BUS (bus)' failed

(camera:7876): GStreamer-CRITICAL **: gst_object_ref: assertion 'object 
!= NULL' failed

(camera:7876): GLib-GObject-CRITICAL **: g_object_set: assertion 
'G_IS_OBJECT (object)' failed

(camera:7876): GLib-GObject-CRITICAL **: g_object_set: assertion 
'G_IS_OBJECT (object)' failed

(camera:7876): GStreamer-CRITICAL **: gst_object_ref: assertion 'object 
!= NULL' failed

(camera:7876): GStreamer-CRITICAL **: gst_element_set_state: assertion 
'GST_IS_ELEMENT (element)' failed

(camera:7876): GLib-GObject-CRITICAL **: g_object_get: assertion 
'G_IS_OBJECT (object)' failed

-- 
Best Regards,
Igor Mironchik.