3rd Party Software

While using pylon 6.2 you can also set an empty environment variable.

export GENICAM_LOG_CONFIG_V3_1 = ""

@SGaist no, i'm beginner in qt

thank you guys, I think I will try directly the Qt Support.

It seems like "reachtech" is some kind of a special case (which I am not knowledgeable about).

In general, I want to agree with @SGaist that a barcode reader normally "presents itself" (via its driver or a generic driver) to the system as just another connected keyboard that types keyboard keys as input.

As @SGaist said, if the keyboard focus is set onto some editable control/widget, then when a barcode is scanned it should "just work" and you would see characters from the barcode typed into the editable control.

I will add one other slightly different approach that I have taken in a particular QML-based application. In my particular case, there were no editable on-screen widgets onto which to place keyboard focus. However, the requirement still existed that the application "capture" any scanned barcodes and display them.

In that application, I used QObject::installEventFilter to install an event filter on the root window of the QML app. The app only used a barcode scanner (never a QWERTY keyboard), so it was simple to just filter every QKeyEvent (QEvent::KeyPress) and assume it was input from the barcode scanner.

To better explain what I mean by "root window", the initialization looked like this:

QQmlApplicationEngine engine; // ... other code to initialize the engine with main.qml and so forth const QList<QObject*> objs = engine.rootObjects(); MY_ASSERT( objs.size() == 1, "if the app starts creating more than one root window, " "please reevaluate the logic of our global event filter" ); objs[ 0 ]->installEventFilter( POINTER_TO_CUSTOM_QOBJECT_FILTER_HERE );

For QML applications that have zero editable controls, this was a successful alternative in my experience.

Hi,

You should check your video file, but as I wild guess, it's likely a FullHD video which is 1920 * 1024. Since you are creating a RGB QImage out of it, it's already weighing about 6MB per image. QPixmap is meant to be optimised for rendering and thus the backing memory used might even be larger for, for example, alpha channel handling. Depending on what else you do with your application and these images you can pretty quickly hit memory limits if your application is 32bit.

@SGaist said in Need suggestions about tone mapping for EXR:

16 bit

Thanks for the info. It might help.

@Ranto-Tiaray-Andrianavonison Hi,

You need to link to the appropriate macOS frameworks and libraries as well.

you can try:

MediaPlayer{ id: playVideo source: "gst-pipeline: filesrc location=/home/root/skim-debris.mp4 ! qtdemux ! avdec_h264 ! qtvideosink" autoLoad: true autoPlay: true playbackRate: 1.0 loops: 10 } VideoOutput { anchors.fill: parent source: playVideo }

thanks @artwaw

Hi and welcome to devnet,

There's nothing particular in Qt for that.

You should use the C++ API provided by Microsoft to implement the communication you want.

@ronaldon
You cannot link mixing compilers.

MinGW produces .a libraries. MSVC produces .lib libraries. You need to pick one of the two compilers and compile both your own code and third-party code with the same compiler toolchain.

Hi,

Did you ensure that you were using OpenCV and Qt built with the same compiler ?

Also note that Qt Creator gains some direct support for vcpkg only in the next upcoming release: https://www.qt.io/blog/qt-creator-cmake-package-manager-auto-setup

Hi,

Where is it installed in your system ?
Did you point CMake to your Qt's cmake files ?