Converting any file to HEVC the first 5-8 seconds of the video is frozen

When I run a file through MCEBuddy to re-encode it to HEVC the first 5-8 seconds of the video are frozen. The sound works fine during this time just the video is frozen. After the first few seconds everything is just fine all the way to the end. This happens on every file I convert.

Anyone else have this problem or know how to fix this?

Thanks!