pyside6 doesn't work with raspberry pi400 still the same error. "No QtMultimedia backend found"

[Minosthor]

Hello community!

I have a very simple program that shows me a video, which works on a PC
under linux Ubuntu without any problems in python3 language with pyside6

I wanted to adapt this little program on a raspberry pi400

First, I installed a Manjaro/plasma linux version on the raspberry
then Pyside6 version 6.7.2

All the attempts I have made to display my video have ended in failure, I keep getting the error:

'No QtMultimedia backends found. Only QMediaDevices, QAudioDevice, QSoundEffect, QAudioSink, and QAudioSource are available.
Failed to initialize QMediaPlayer "Not available"
Failed to create QVideoSink "Not available"'

ffmpeg is installed, gstreamer is installed, I tried to place "QT_MEDIA_BACKEND=ffmpeg" in the environment variables. This gives nothing, still the same error.

Impossible to run this program under raspberry.
I installed ubuntu on raspberry, but still stuck with the same error.

I haven't found a single solution in the existing forums on internet.

Do you have a solution to make pyside6 work correctly on raspberry?
Thanks for your help !

[SGaist]

Hi and welcome to devnet,

Are you running a 64 or 32 bit distribution ? Not that it should matter but who knows.
Also, how are you installing PySide6 ?