Arch Linux

Description:
On my laptop vlc cannot accelerate hardware some avi mpeg videos that are played in jerky mode.
When this problem happens I get the following output on the console from which I've launched vlc:

VLC media player 3.0.10 Vetinari (revision 3.0.10-0-g7f145afa84)
[0000558de8dea5b0] main libvlc: Esecuzione di vlc con l'interfaccia predefinita. Usa 'cvlc' per utilizzare vlc senza interfaccia.
[QtOIIO] Plugin Initialized
[00007f59380079e0] avcodec decoder: Using NVIDIA VDPAU Driver Shared Library 440.82 Wed Apr 1 19:39:06 UTC 2020 for hardware decoding
[mpeg4 @ 0x7f5938cad380] Failed setup for format vdpau: hwaccel initialisation returned error.
[00007f59380079e0] avcodec decoder error: existing hardware acceleration cannot be reused
[0000558de8eb2430] main playlist: end of playlist, exiting
QObject::~QObject: Timers cannot be stopped from another thread

In the past (months or a couple of years ago) the same files played correctly with vlc.

My laptop is an asus n752vx with i7-6700hq, 16GB RAM, nvidia 950M with proprietary drivers set up in order to always use the discrete card instead of the intel one and with prime enabled using nvidia-drm.modeset=1 and this is mine xorg.conf:

Section "Module"
Load "modesetting"
EndSection

Section "Device"
Identifier "nvidia"
Driver "nvidia"
BusID "PCI:1:0:0"
Option "AllowEmptyInitialConfiguration"
EndSection

Additional info:
* package version(s) 3.0.10

Steps to reproduce: try to play some specific .avi mpeg coded files which previously used to work