

Your HEVC video is adopted with VFR, which will slip audio out of sync with the video inside Premiere Pro.If the HEVC is 12 bit, 422, or 444 HEVC files and you cannot import, ensure that that the HEVC codec is installed. HEVC codec is missing in Adobe Premiere Pro.

If there is more than one display card, then update their respective display card drivers, as well.

Why can't You Import HEVC Videos to Adobe Premiere Pro Fix 3: Adjust Adobe Premiere Pro Settings.Fix 2: Install HEVC Codec for Premiere Pro.Fix 1: Transcode HEVC Videos to MP4 for Premiere Pro.Why HEVC Videos are Not Importing to Premiere Pro?.
