I paid for and activated HEVC codec in MAGIX Movie Edit Pro Plus so i could edit video from GoPro Hero10 and the audio doesn't work properly, lots of crackling noise and my voice faintly in background sounds like it's playing at wrong speed.
. . . . MAGIX Movie Edit Pro Plus so i could edit video from GoPro Hero10 . . . .
We need more information
Computer specification, Windows version and program version, see this topic for what is required and please quote processor and graphics card make/model in full.
I would suggest you put this information in your profile signature so we do not have to keep asking for it.
Download and install MediaInfo and analyse one of the GoPro clips and post the results, see this tutorial on how to setup MediaInfo and analyse a video clip for all the data required.