Tested on a 650D with dforts crop_rec_4k.2017Oct11.650D104.zip
loaded mlv-lite
loaded crop-rec
loaded silent
set 14bit lossless on a fast SD card
Crop Rec Enabled
Tried 1920x1080 but camera set itself to 1792x1008
Recording had red light on all the time - but managed 410 frames.
As you can see there are some problems with the picture but this is very encouraging. Thank you.
(The mlv is being viewed through MLV.App.v0.8.alpha.OSX.zip)
I tried 1280x720 14bitLossless but the same block scan line patterning is still there.