Rename files leaving same number

[maureol]

Hello,
is it possible to automatically rename files with increasing number but with no increasing number if number in previous file name is the same?

I give an example in ordere to explain my question:
Before:
IMG_0755.JPG
MVI_0771.AVI
MVI_0771.THM
IMG_0790.JPG
After:
Event_xxxx_001.JPG
Event_xxxx_002.AVI
Event_xxxx_002.THM
Event_xxxx_003.JPG

Thanks

[obelisk]

really a bit over...
you'd never get it sorted like that in the 1st place.

[maureol]

really a bit over...
you'd never get it sorted like that in the 1st place.

Sorry, I don't know if I really understood what you wrote (I don't speak English very well): at first ("before") files to be renamed are sorted by capture date.
Thanks