I have several mp4 files, recorded at 4k @ 50fps, which play jumpy on my MacBook Pro running OS Catalina.
When viewed as preview the videos display perfectly, however when opened with Quicktime they jump and flash.
Have tried playing same files on windows PC and they play as they should.
Any advise would be very welcome.
Thanks
MacBook Pro 13", macOS 10.15
Hi BonzoMAC,
Thanks for using Apple Support Communities! I see you're having an issue playing some files with Quicktime, and I'd like to do what I can to help.
Have you restarted your Mac since noticing this issue? If not, go ahead and do that, as a restart can resolve unusual issues.
Check that you're on the latest macOS Catalina version which is 10.15.2. If you need to update, back up your Mac first, if you haven't recently.
How to update the software on your Mac
If you're still having the issue, then see if it happens with another user. How to test an issue in another user account on your Mac
If an audio or video file doesn't play on Mac may also be helpful.
If you're still having issues, I'd suggest contacting Apple Support.
Here's some additional info on QuickTime: Open and play a file in QuickTime Player on Mac
Take care!
Data rate of those huge files exceeds the playback abilities of your machine.
Jumpy 4K mp4 files
