For me the most important feature I wish I have with 4K builds is card spanning.
It's so distracting that we had this feature before.
Because the mind blowing 45/48 FHD mode is only 6-7 sec on my camera!!!
Ironically, this is just a "coding task" no need to investigate something new.
I even tried several times to do this myself, but, despite of vast amount of code analysis background,
this task is overkill for me: not enough of C knowledge and details about underlying hardware and OS functionality.
Mlv_rec and mlv_lite modules are significantly different regarded how data record is implemented
and no possible to just copy code from one to another.
I understand, that for main developers this is just boring job, they spend time discovering something new.
Anyone with decent C skills and MKIII camera???