mp4 file import

I recently posted asking for advice because I seem suddenly to be unable to import mp4 files or audio from such files despite having no problems whatsoever doing this a few days ago.

Your eagle-eyed correspondent has just noticed (I hadn’t seen this before) that now when I go to choose the file to import, I have a notice in the file browser window telling me that my file is 'Invalid or not supported!"

These are just mp4 files and they are moreover exactly the same files that I imported successfully a few days ago.

Has anybody else been having this problem?

got some help from support who recommended i install quicktime v7.7.9

problem solved! good work Jarrod at support!