Hi! Also running into this problem. As suggested I searched and did not find the info that Dave Martin referenced.
Long time mac video person, working with PC video for the first time. I understand about codecs, however, if we can see the video in the preview player, then the codec is installed. Or am I mistaken?
I converted my H.264 codec to a PhotoJPG codec and I still got the same message.
Could it be that Photoscan on the PC side does not like Quicktime? That would be the format (or wrapper) and not necessarily the codec. I will do a test on that when I find some time, hopefully tonight.
Any other thoughts appreciated - thanks!
Michael