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Quicktime Playback - Green Screen of Death

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TJ Ingrassia
Quicktime Playback - Green Screen of Death
on Jun 26, 2019 at 11:31:11 am

I've been having this issue with my iMac for a long time, over multiple OS versions.

When playing videos with Quicktime (either in the app or, more often, using Quick Look), my system will temporarily freeze. After a few seconds, it unfreezes, but all video files turn completely green.

Interestingly, it affects videos differently depending on playback...

- All videos played in Quicktime or with Quick Look are completely green

- Videos play fine using VLC

- Videos play fine inside Premiere Pro, but are completely green upon Exporting

- Some but not all videos play completely Green on YouTube

Restarting my system temporarily fixes the problem, but it inevitably happens again.

I've tried reseting NVRAM and SMC but that didn't fix it. There are various posts on various threads going back years related to this issue, but I've never seen a definitive answer as to what causes it or how to fix it.

- 27-inch late 2015 5K iMac
- Mojave v10.14.4
- AMD Radeon R9 M395X 4 GB

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Mark Suszko
Re: Quicktime Playback - Green Screen of Death
on Aug 29, 2019 at 2:41:06 pm

At a guess, one of your codecs is "broken".

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