Hey Alex, unfortunately those changes you made to the latest build (2017-04-27 21:51) didn't do it. It still only records 6 seconds ALL-I or IPB before I get an "emergency stop" notification on the live view.
Solved. The changes were non-trivial, but since it was a memory management issue, it got higher priority.
At 1920x1080 24p 12-bit lossless, and a bit of luck (because of the variable bitrate) recording can be continuous even with both RAW and H.264 on the same card. With H.264 on SD and RAW on CF, both recorders have *much* more headroom.
Careful when the card gets full, as this event is not handled very well (and it requires more reverse engineering to figure it out).
preview is slow and gray , recording number stay green....(think normal) but after 10-15 seconds ...STOP !
Solved that too (although I wish I had a proper bug report). The real-time estimations (and the indicator color) were completely messed up in lossless recording modes, and just OK-ish in uncompressed mode (with estimations being far away from actual recording times).