I tried to integrate RAW2MLV to MLVApp. To use this, compile and install raw2mlv like this (path of MLVApp executable):

If MLVApp finds this executable, it will show this action:

Triggering brings:

Select single picture or a sequence folder, then click "Transcode and Import", choose a destination folder. Then it will need some time - WAIT! - and the converted files show up in the session.
TESTED ON OSX ONLY! Linux might work too, on Windows I expect some additions. AND: only the "good" use case works - no error handling at all. So if you do s*** you will get s***. 
This doesn't work for me on any of my macs. Any help would be appreciated.
I have MBP with Yosemite, MBP with Catalina and Macpro5.1 with High sierra.
What I dit, just extracted the executeable from the raw2mlv.app and copied it to the MLV10.1 package inside of Macos folder. Checking in Terminal, it shows the correct right like mlv or ffmpeg executables.
Fortunately, raw2mlv.app standalone works well
I also became curious, if it works with CHDK - generated cr2 files from my sx220 - sadly it doesn't
The files are recognised by the mac finder and raw2mlv generates a mlv video clip, but this is pure white only. So maybe this is no real cr2 file I assume. Anyone using CHDK also who can check this?
thanks