Defect footage after imported file

[papichh99275105]

There are some defect footage after I imported into Premiere Pro (Beta) (22.0) but the original footage does not have a problem.

[Andy Edwards]

What type of media are you importing? For example ProRes, AVCHD, H.264? 

What are your computer specs / Operating system version / GPU drivers version if on windows?

[papichh99275105]

It's H.264 .mp4 file

I use iMac (M1, 2021) and software is macOS Big Sur version 11.5.2

[mayjain]

Hi @papichh99275105,    

Can you please share the camera details and a sample media which is causing this issue, if possible?  
Is it a 422 10 bit media ? Check by selecting the clip in Project Panel and right click--> Properties 

Please also verify if your Hardware decoding option is checked.
Prefereces --> Media --> checkbox at the bottom

Thanks, Mayjain