What's Proren ?

ProRen was developed to rename files. But it doen't work like the rename-command. Everyone who has to deal with larger animation will surely like it. It offers you the ability to rename thousands of frames with different filenames into one single format containing the Basename (not necessary) plus an Index (up to 6 digits).

Short example:
     old name               new Name
     Hansi.iff              frame.001
     UlrichsKopf.br         frame.002
     Petra                  frame.003
     Logo1                  frame.004
     Logo2                  frame.005
     Portrait_von_mir       frame.006

Here frame is the basename, 001 to 004 is Index.
Second possibility:
     old name               new Name
     Pic.000                Anim.010
     Pic.001.iff            Anim.011
     Picture.2.jpg          Anim.012
     Bild.0003              Anim.013
     Pic.5                  Anim.014 or Anim.015 (choosable)

Here the index was moved by 10.

Any filename except the following could be used as source

As a concequence that all changes are saved you can of course undo them. That gives you the following possibilities:
The single frames of an animation exist of BASENAME and DIGIT: