Audiomontage with Sony MP4 Video and Wavelab freezes (Win.11)

Hi,

when I import and try to play an mp4 Video (29.97) from my Sony cam (ZV-1), Wavelab (12, 13 Elements and Pro) starts freezing. The first seconds I can start playback but no video is displayed in the video window. Then things get worse. CPU usage increases dramatically and Wavelab freezes.

I can play these mp4 files in Davinci, Cubase and Firefox browser without any problems. When I rerender the mp4 file in Davinci, then Wavelab can playback the video correctly.

Chris