Qt Creator - Example camera project: Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory

QtFriend2024 · 12 Oct 2024, 14:42

Where do I get libvdpau_nvidia.so?

QT Version: 6.7.3
Device: NVIDIA Jetson Orin Nano (with JetPack 6)
O.S.: Ubuntu 22.04.5 LTS
Camera Connector: CSI (Camera Serial Interface)

Hello, I am trying to run your 'camera' project example on the NVIDIA Jetson Orin Nano device.

When I run the the program, I get the error shown in the subject of this message. The QT example camera application launches but it won't display anything from the camera. I verified through the terminal that the CSI camera is connected and working by using the command: nvgstcapture-1.0

Application Output:

19:47:07: Starting /home/xxxxxx/Qt/Examples/Qt-6.7.3/multimedia/camera/build/Desktop_Qt_6_7_3-Debug/camera...
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory

More information:

xxxxx@xxxxxx-nvidia:/lib/aarch64-linux-gnu$ find libvdpau*
libvdpau.so
libvdpau.so.1
libvdpau.so.1.0.0

Thank you for the help

QtFriend2024 · wrote on 6 Mar 2025, 19:06

I am able to create a QT application that uses USB camera. This was my solution.

SGaist · wrote on 10 Dec 2024, 20:22

Hi and welcome to devnet,

What about /usr/lib ?

QTDeveloper2023 · 12 Nov 2024, 02:42

@SGaist
oh wow /usr/lib/libvdpau_nvidia.so exists!
How do I get QT Creator to find it?

jsulm · wrote on 11 Dec 2024, 07:49

@QTDeveloper2023 said in Qt Creator - Example camera project: Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory:

How do I get QT Creator to find it?

The loader should actually look there by default. Try to add that folder to LD_LIBRARY_PATH env variable (in Run config in QtCreator).

QTDeveloper2023 · wrote on 12 Dec 2024, 20:16

This post is deleted!

QtFriend2024 · 12 Dec 2024, 20:23

@SGaist It turns out that the /usr/lib/libvdpau_nvidia.so is a symlink to a non-existing file.
Where do I get libvdpau_nvidia.so?

Thank you

SGaist · 13 Dec 2024, 14:48

@QtFriend2024 are you sure your NVIDIA setup is complete ?

QtFriend2024 · S SGaist 12 Dec 2024, 20:23

@SGaist I followed the setup guide: https://developer.nvidia.com/embedded/learn/get-started-jetson-orin-nano-devkit

SGaist · wrote on 2 Jan 2025, 09:01

What is the exact name of the missing file ?

QtFriend2024 · wrote on 6 Mar 2025, 19:06

I am able to create a QT application that uses USB camera. This was my solution.