Helo
maybe this may help You.
First, let's ensure You have something similar like the following -
eosM
Firmware v202
Camera in Videomode
64GB W50 R55 , Exfat
nonAF lens
a full battery
canon settings
PAL & 1920x1080@24
ML Version
magicklantern-Nightly.2018Jul03.EOSM202_mv1080p.zip
Put Your card in a card reader and Save Your data.
Start the cam and go to ML Menu -> Prefs -> Config files -> Restore ML defaults, then leave the ML menu.
Turn Your cam off and back on again.
Go to ML menu -> Overlay and turn GD off
Go to ML menu -> Modules and activate
crop_rec
lua
mlv_lite
mlv_snd
sd_uhs , then leave the ML menu.
Turn Your cam off and back on again.
Go to ML menu -> Movie -> Crop mode and select 3x3_mv1080_EOSM
Wait few seconds then leave ML menu and enter it back again.
Go to ML menu -> Debug and check Memory patches entry - it should be active (red) and show "1 ROM, 2 RAM" entry.
Go to ML menu -> Scripts and select one of the mv1080p_12bit scripts.
Press SET to load/run this script. Wait until it completes, then leave the ML menu. Turn Your cam off and back on again.
Message visible after startup should be "FPS override : 24.002" *)
Go to ML menu -> Movie -> Raw video and tap the screen . Inside it change the Aspect ratio value to 1:2 and the resolution should change to 1736x1120. Change the value of Data format to 14-bit lossless. Change the "Preview" to "Real-time".
Leave the ML menu. Turn Your cam off and back on again.
Now Your cam is set up. The following step is necessary to allow higher speeds of the SD card. This step has to be repeated after each start of the cam.
Go to ML menu -> Scripts and select the "enable SD overclocking" script and hit "Run Script". Wait until it's done. Don't use the "Autorun" feature to start this script automatically at startup.
Activate GD if You like.
You should see an upper portion of an image. Press&hold Half-shutter for framing.
My recording speed is around 50,8 MB/sec
So this works for me and I can record non cropped 3x3 mv1080 type video. The cam is responsive and the green recording sign jumps in right from start on. Disable GD, then record to check the actual speed, reenable GD after again.
The first picture is 50mm lens, the second a 28mm and the third a c-mount 12.5mm lens.
Many Thanks to user "the associate" who motivated me and of course to Danne for this build and all other Devs and ML folks
Af-off


*) Even thou this message is shown at startup, the frame rate shown under ML menu -> Movie -> FPS override is shown as 23,980