Thanks hjfilmspeed
I followed your video with the exact settings but encountered 2 errors described below. I also then tried Full-resolution LiveView: 5796x3870 at 7.4 fps and got the same errors. The attached images are the settings for "full-resolution LiveView: 5796x3870 at 7.4 fps"
MY SUMMARY:
I tried the following :
1) video settings by Jonathan DeNicholas (
comment_15952088) How ro Record 3k on 5dmkIII with Magic Lantern
2) Full-resolution LiveView: 5796x3870 at 7.4 fps (128ms rolling shutter) - continuous*) at 5 FPS! - seeting at 14-bit lossless compression mode (LJ92), preview set to Frozen LV (previously known as Hacked Preview)
For both scenarios above the movie recorded and I extracted the DNGS using MLV convertor but could not open the DNGS in Photoshop CC 2017.
-The error was "Could not complete your request because the file-format module cannot parse the file." , see attachments
- In bridge I can see each DNG file has many dots of different colors. ." , attachments
OTHER DETAILS
Canon 5dmkIII
Card 64gb 1066 compact flash
Using latest crop_rec_4k.2017 Jun 19.5d3123.zip
Using MLV convertor to extract DNGs
Photoshop error reading the DNG

What I see in BRIDGE- colored dots