Hello AI needs Qt

[floater]

I am trying to compile my-recognition.cpp in the Hello AI World tutorial, and it fails saying it cannot find a Qt component. I am using a Jetson Nano with the latest tools. I have installed Qt and built one of the Qt examples, so I think Qt is working okay. I also ran the my-recognition.py python version okay. Maybe it is looking for a different version of Qt? Thanks for any help.

[DaneLLL]

Hi,
FYR. Please check two topics about QT:

Jetson Nano and Qt5

Hi sqwer6545, Yes, that is the linux arch issue because jetson Nano is using arm64. I tried to build qt5 last year on my TX2. The steps should be similar. Please note that this is not cross compile case. For cross compile, I think you could refer to qt official website. https://doc.qt.io/QtForDeviceCreation/qtee-preparing-hardware-jetsontx1.html Download the backend from public source wget http://master.qt.io/archive/qt/5.9/5.9.2/single/qt-everywhere-opensource-src-5.9.2.tar.xz #Some user…

Pyqt not working on Nano

ok, so I tried: sudo apt-get build-dep qt5-default sudo apt install libcanberra-gtk-module sudo apt install qt5-style-plugins echo "export QT_QPA_PLATFORMTHEME=gtk2" >> ~/.profile Then the problem solved… maybe this post can help:

[dusty_nv]

@floater

I am trying to compile my-recognition.cpp in the Hello AI World tutorial, and it fails saying it cannot find a Qt component.

Hi @floater, is it possible that you are running an older version of the jetson-inference repo?

The Qt dependency for the my-recognition sample was removed some time ago.

Can you try updating your repo or re-cloning from master? I just confirmed that I was able to build my-recognition without issue.

[floater]

Thanks. That appeared to be the problem. I downloaded again, and now it builds okay.