Hello,
I have a similar issue with the MK3 footage. Start of day I tried to cinema tools a few clips from 60fps to 24. I usually do this in its H.264 form and after the FPS conform I then take it into Mpeg streamclip.
Middle of the day I installed a AVCCAMImporter plugin so I can look at .MTS footage from my friends Sony handycam pain in the A$$.
End of day and restart after restart Cinema Tools doesnt want to conform these 60fps MK3 files at all.
so do I need a new plugin? Am I screwed or did I screw up with the installation of that AVCCAMImporter plugin?
And I converted 1 of these clips in mpeg to prores422 and cinema tools wont recognize the clip.