Hard Pixelisation horrible

[Patatra]

Hi, I'm new to premiere pro and during small passages,
a few frames are completely messed up by something that makes the image completely pixelated and disgusting.
At times she leaves, then comes back, then leaves even if on some clips, she remains present, I emptied the media cache, made preview renders to turn everything green, used CBR instead of VBR during the export but nothing helped, I'm desperate, an Idea ?

Fr :

Salut, je débute sur premiere pro et durant de petits passages, quelques frames sont complétement bousillé par je ne sais quoi qui rends l'image complétemement pixelisé et dégueulasse. Par moment elle part, puis reviens, puis repars même si sur certains clip, elle reste présente quoi qu'il arrive.

J'ai vidé le cache média, fait des rendu de prévisualisation pour tous passer en vert, utilisé CBR au lieu de VBR durant l'export mais rien n'y fait, jcomme à désespérer,

une idée?

[Peru Bob]

Try turning off Hardware encoding in the Video tab of the export settings.

If that doesn’t work, try updating or rolling back your graphics driver directly from the video card manufacturer’s site. If NVIDIA, do a clean installation of the latest Studio Driver (NOT the Game Driver)

If that doesn't work, try creating a new project and import the old one into it.

[Peru Bob]

Also, please use the free MediaInfo and post a screenshot of the properties of your media in tree view:
https://mediaarea.net/en/MediaInfo

Many users are having issues with VFR. If the file is variable frame rate, use Handbrake to convert to constant frame rate:
https://handbrake.fr/downloads.php
Here is a tutorial:
https://www.youtube.com/watch?time_continue=34&v=xlvxgVREX-Y

Shutter Encoder may also be used to convert to Constant Frame Rate:
https://www.shutterencoder.com/en/