I have many quicktime files from GettyImages that are encoded in XDCam EX format 1440x1080 23.98fps. these no longer import and say that the format is unsupported on the latest versions of premiere/media encoder on either MacOS or Windows 10. it was suggested to me to encode using Handbrake but i am already transcoding to ProRes so don't want a third party making another file. These files all worked a number of versions back as i used them in another project but now they don't work or import! why had adobe drop the support for these files.
Here is an example https://shared-assets.adobe.com/link/c115358a-a20e-412f-5c71-23988a931168