First of all, thanks for your help.
I know it's annoying to help someone when on our side everything work fine...
I tried with your last upload, i deleted the mp4 file and put my original (the one i shared with you) in the same folder, i ran Rhadev6.exe and it generated a file:
giannaflower(05-2014--0755).mp4
Seems fine, but it is not, the file is 1Kb
I'm wondering if theres something to do with some codec/ffdshow or other that has to be installed on my system ?
I tried again after editing, and deleting the Model_List.db and it result in same 1Kb file when edited (reduce numbers of models and keep only the one corresponding) and simply no file if Model_List.db is deleted.
For now i'm using yaflvfix and renaming files by hand, better than nothing.