Hello All --- Great News !!!!
will we are almost there ! 4k/UHD Raw video on the 5D Mark ii , we had a break thought on the forum & now we have 3k (2880x1080) 10bit Raw video at Widescope format (2.66:1) :)) this in 3x Crop_mode or (5x zoom) with a crop record module , same as the 5D mark iii with 4k . Currently the data rate for this frame size is 89 MB/s , that's greater then the 77MB/s the 5D Marrk ii can do . Yes , but there is also under development the CF card interface to increase the write speed to 105MB/s . You may wounder how it can be ! Will the 5D2 connects to the CF card as UDMA 6 no matter if the the card is UDMA 7 . Thought Low Level access to the register we are able to "force" UDMA 7 with a 30% increase in write speed , so around 100-110 MB/s , but there is a side effect after recording a mlv file it corrupts the magic lantern file system .
So more work needed to figure out what the issue is . Then after that , raw compression to lossless , which will increase write speed by 40-50% in 14bit lossless , once again like the 5D3 .
Shot the quick sample at 2880x1080 @ 23.976 with frame skipping enable , so there is a few drop frames and it is noticeable from time to time but it is still usable . I what to show that near UHD is possible and a working concept . So if you see a some out of sync audio , it because a recorded the audio on the my N4H , i have to cut up the audio a lot to make it match the best i could , please take that in account when watch the video .
Used the EF 24-70f2.8L @ 24mm , crop factor at 3k is 1.95 = 46.8mm , set to f4 1/42 shutter with ISO 400 . I used mlv_dump on windows 7 to extract to true 10bit raw 3.71MB per-frame , imported the Cdng's in to blackmagic Resolve 12.5(Wins) and did a basic raw adjustment to rec709 color space and exported to DNxHR 444 , finished off in FCPX , exported to ProRes 422HQ and uploaded that file . Notice Youtube has not 3k or 2K so it's just 1080p Sorry . plus it seem youtube has put the Audio out of Sync more then i thought , Sorry i'll try and fix this .