QuickTime Error “Cannot Open” When Trying to Save an Edit
Video demo on YouTube, link above.
If your seeing the error “Cannot Open” when trying to save a video split, trimmed, or added in QuickTime then this issue is likely due to the source file being damaged in some way. In this video I’m demonstrating how QuickTime and the Preview app in MacOS Catalina 10.15.3 can not save changes to videos that have missing frames. However this issue is very trivial for every other video editing or encoding software so if you are experiencing this issue then your source media likely can be fixed.
A READ ME NOTE:
I had made a screen recording of another issue but when reviewing the video I noticed that the QuickTime Screen Capture had frozen at exactly the moment my cursor interacted with the Side-By-Side Adjustment Bar bug which I was trying to document.
Although the video capture had become stuck at that moment in the clip the other 8 minutes of the video still had audio. I tried using the "Split clip" feature in QuickTime to trim the video at the 44 seconds mark because the reaming parts of the video don't make any sence becasue you want see what I'm talking about.
When I tried saving this clip, QuickTime has an error "Cannot Open. This media may be damaged." The Photos app and the Preview app also have this same issue. Likely they have the same implementation.
Now although you guys have repeatably blamed FFmpeg on the reason for my "kernel_task" process using 1000% to 1400% CPU constantly, it is actually a very reliable program and used by hundreds of thousands of projects in all operating systems and use cases. FFmpeg have years of documentation of issues and edge cases that have needed solutions and fixes.
Repairing videos with missing frames is trivial and should be something that built in MacOS apps should be able to do.
I ended up having to trim the video to 44 seconds using FFmpeg, an app (Unix executable) which I promised to keep off my computer as you (Apple Support reps) have repeatably blamed the high CPU usage from "kernel_task" on, but thats BS!
MacBook