Exporting from QuickTime takes forever after updating to BigSur

Once a week I receive an mp4 video (around 4 GB) which I then publish on the web. In order to reduce the filesize I will open the file in QuickTime and export 1080 as .mov file. This typically takes 5-10 minutes. But since last week I’ve updates to BigSur and now the export to take at least 5 hours.


Has anyone else encountered this problem? Any solutions?

iMac 21.5″, macOS 11.0

Posted on Nov 21, 2020 2:13 PM

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Posted on Nov 28, 2020 6:01 AM

The issue is solved.


It turned out QuickTime chose as a default setting: Smaller File Size (HEVC) and that takes hours to export for 30 minutes long HD video. I switched to Greater Combatibility (H.264) and successfully exported in 3 minutes.

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Exporting from QuickTime takes forever after updating to BigSur

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