Shane, thank you so much for your answer!
[Shane Ross] “..difference is between FRAME RATE and ORIGINAL FRAME RATE
I don’t have a clue. That’s what MediaInfo says.
[Shane Ross] “..Avid doesn’t work with 1080p60 files”
It’s definitely interlaced.
[Shane Ross] “Can you get past that error? or does it not let you?”
I just ignored the message for this time, and transcode went well.
It looks crappy (but no artifacts) which is maybe because of the camera anyway…