Raspberry Pi QT 5.9.2 -qt.camera not working (no service found for - “org.qt-project.qt.camera”

neda

Hi,
I want to run a simple sample camera application but I have this error:

defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.camera"
Note: I install Qt 5.9.2 in Raspberry Pi3 (Raspbian).

Note: I install this packages but not benefit.

sudo apt-get install libqt5multimedia5-plugins

qtmultimedia5-dev
sudo apt-get install gstreamer-tools
sudo apt-get install gstreamer1.0-tools
sudo apt-get dist-upgrade

sudo apt-get install qtmultimedia5-dev libqt5multimediawidgets5 libqt5multimedia5-plugins libqt5multimedia5

sudo apt-get build-dep qtmultimedia5-dev

jsulm

@neda Those sudo apt-get install you did on your host machine or RaspberryPi?
Also, you said you installed Qt 5.9.2. Those sudo apt-get install will not help you on RaspberryPi as it will install another Qt version not related to your Qt 5.9.2.
How did you install Qt 5.9.2?

neda

@jsulm said in Raspberry Pi QT 5.9.2 -qt.camera not working (no service found for - “org.qt-project.qt.camera”:

Those sudo apt-get install you did on your host machine or RaspberryPi?
RaspberryPi

@jsulm How did you install Qt 5.9.2?
https://wiki.qt.io/Native_Build_of_Qt5_on_a_Raspberry_Pi

jsulm

@neda Then all those apt-get install will not help you. When you built Qt did you build qtmultimedia?

neda

@jsulm said in Raspberry Pi QT 5.9.2 -qt.camera not working (no service found for - “org.qt-project.qt.camera”:

When you built Qt did you build qtmultimedia?

I don't know. How build qtmultimedia?

jsulm

@neda Sorry, forget my last question: you have QtMultimedia, else you would not be able to build your app.
Try to set QT_DEBUG_PLUGINS=1 in a terminal (or QtCreator Run settings for your project) and then start your app there, then post the output here:

QT_DEBUG_PLUGINS=1 && ./my_app

neda

@jsulm said in Raspberry Pi QT 5.9.2 -qt.camera not working (no service found for - “org.qt-project.qt.camera”:

Try to set QT_DEBUG_PLUGINS=1 in a terminal

In terminal:
QT_DEBUG_PLUGINS=1

I execute this commands in terminal:

$ export QT_PLUGIN_PATH=/usr/local/plugins/
$ export QT_DEBUG_PLUGINS=1

@jsulm then start your app there
Did you mean to run from terminal?

I start my app in Qt Creator in Raspberry.
output:

Starting /home/pi/build-untitled-Desktop-Debug/untitled...
QML debugging is enabled. Only use this in a safe environment.
Unable to query physical screen size, defaulting to 100 dpi.
To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).
JIT is disabled for QML. Property bindings and animations will be very slow. Visit https://wiki.qt.io/V4 to learn about possible solutions for your platform.
defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.camera"
transient parent ApplicationWindow_QMLTYPE_11(0xe66fc8) can not be same as window