Forum Discussion
Why quicktime not playing mp4 files on mac and windows pc?
It is an MP4 video file downloaded from Bluesky app. When I was trying to play the mp4 file on my Mac, this error message pops up: This file contains some media which isn’t compatible with QuickTim...
QuickTime player does not support MP4 video files with VP09 codecs. No worries. You can convert the mp4 video to QuickTime player compatible codes such as H.264 or H.265.