@reddeercity Is it techninally possible to get slow motion 48+ fps in crop mode? If I were to copy your slow motion registers while in 5x would it be effective?
Or does that need something completely different
Yes needs something different, 48fps is dependent on line skipping & vertical compressed (3x5) which only work will in 3x3
you can force line skipping in 3x crop but can't produce a useable image (being trying for 2 weeks now)
The best to hope for in crop mode would be a very small crop window e.g. 1280x430 (crop factor of about 4.5 which I have no interest in)
The simple fact that the sensor is very slow (96MP/s) kept it from any meaning full resolutions & or hi-frame rate .
This is a fact that can't be changed at present , Overclocking the sensor frequency would be the only way (24->32 maybe ?)
a1ex would the only one that would know for sure.
But you got to ask yourself , is worth it ? there would need to be more voltage among other variable (just like overcocking PC CPU)
Can it handle it or will it burn up ?
But you can certainly explore the possible , All my note are here on my thread .
..... discussing with Danne about making presets for crop_rec out of the sets of registers that reddeercity has been finding.
It seems really difficult, .....
No it not difficult , I got it figured out just been
too busy to finish coding it .
D4 cams work a little different then d5 cams in crop_rec . (this is no small thing , it took @waza57 some time to get it to work , more then a mirror hack)
beside that , I not very impressed with 4k compressed vertical (4096x590)
It seems to produce more artifact then standard 3x3 (1856x1248) , I guess because of the different pixel binding then d5 -- it's worst then d5 cams .
So I guess just because you can implement something doesn't mean you should .

I'm looking at this from a video production side (that why I won't have anything that doesn't record @ 24fps - besides Full Res (5632x3755@4.5fps)
I'm re-evaluating all my presets , sorry for the delay but life come first

As this part of the development is coming to a close for the 5D2 , other d4 cams with users need to catch up on there own (I'll still help where I can).
After I finish the crop_rec for the 5d2 , I'll spend my time now on overclocking CF card bus & Lossless compression .
I know the limitations of the sensor now , I pushed it as far as it can go (I can see a cam upgrade for me in the future maybe 5d3 or 5d4)