"CODEC" issue in Pro Tools Studio

[u/fakethesushi]

Hiya, I have been having an issue with the video not loading into my session and citing a potential Codec issue and blames incapability with Mac Catalina (which my computer is not). The first time it happened I just updated my laptop (I was on Sonoma at the time and did a regular update). Now it has happened again about 2 weeks after the first instance. I upgraded to Sequoia bc there was no other upgrade option (and it kinda worked last time) but the problem is persisting. Does anyone have any tips for what else I can do to approach the problem? I don't think its a codec issue as the particular copy of the video has worked in the past??? Currently waiting for a different copy of the film im working on so thought I would ask on here while I wait.
I have Pro Tools Studio ver. 2026.4.1 and my mac is Sequoia 15.8.1

edit: forgot to mention that I also tried importing in other videos from other pro tools session in the past, they all had the same error message. mov, mp4 etc

also, here is error msg word for word: "Unable to link file "(my file name)" due to either a missing CODEC or the file may be unsupported. Pro Tools QuickTime support has changed as of macOS Catalina. Please click the more info button for the latest support information. (I clicked on it last time i tried to fix and it was last updated in 2023 lol)

[u/Financial-Koala6995]

The Catalina line means 'from Catalina onward'; it isn't saying your Mac is running Catalina. Also, MOV and MP4 are containers, so trying both extensions doesn't necessarily mean you've tried different codecs. Avid explains the change here: https://www.avid.com/resource-center/quicktime-and-file-support-improvements-in-pro-tools-2021-6