The frozen Liveview did happen on the 5D3 in crop_rec 4K if memory serve me correctly ,
I do think a1ex fixed that in mlv_lite , that the one I've been working from .
if you can fix the compiling problem/error in mlv_lite , has something to do with compressed raw 10,12 bit ?
I think I had it compiling in d4 4k crop_rec , I do believe I just commented out the 10-12bit compressed stuff .
With mlv_lite the preview should be better , it where the bulk of the crop_rec 4k stuff is .
I can get around 30 second (average 79-80MB/s) after playing around with the srm write mode , "4" seem to be the fastest until a frame skips .
I did enabled "frame skipping" and shot a 8GB 1:40 second 2880x1080 clip , I really did notice any missing frames (unless it was just 1 frame)
It look seamless after rendering to a prores , next I'll try a talking head and see if there's a noticeable gap -- even if there is run a "bcam"
and kept recording 3k , if it's just one or two frame I can live with that for the monument .
Now next we need compression , that's lossless compressed raw . We are very close on the that front I think , the problem is the cam lockup's upon
saving a lossless silent photo (when we can save a lossless silent photo we should have it for raw video)
Here where we are at right now with 5D2/D4 cam's
ProcessTwoInTwoOutLosslessPath There may be another way also to increase the CF card write speed --
I notice in one of my LOG's that for some reason 5d2 clocks the UDMA at 6 , where the cards are rated for UDMA 7
825FE> CSMgrTask:00095f98:00:00: *** register_interrupt("CFDriver", 0x82, 0xffb8b8cc, 0x0), from ffb8bb58
.............
834A0> CSMgrTask:ffb8a92c:22:05: [ID:Model Number] = LEXAR ATA FLASH CARD
834C8> CSMgrTask:ffb8aabc:22:05: IDE = 4, PCMCIA = 80, UDMA = 6
.............
83572> CSMgrTask:ffbdb8a0:22:01: cfDecideTiming: UDMA Mode 6 (CFA4.0)
.............
83592> CSMgrTask:ffbdbb3c:22:03: CF_GetAccessTiming : DatTim = 3, DatMod = 6
Quote from a1ex
here@reddeercity: more details after I'll get a new card (it *is* possible to overclock the 5D2 CF interface).
You can send ATA commands to the CF card (QEMU emulates them), so if the only difference between UDMA 6 and 7 is timing, it might even be possible to put the card in UDMA7.
If this could work , then we would have some write speed as the 5d3 or close to it (120MB/s) anything we could gain is better then 79MB/s
some related stuff -->
https://www.magiclantern.fm/forum/index.php?topic=21311.msg204395#msg204395Lots to do yet , but we are on the way

Edit: just notice the crop factor when down from almost 3 (2.8 ) to 1.95 ,
which mean it's more usable , e.g. 24mm -> 46.8 mm