Interlace frame numbers with file output node I have a setup in the compositor that takes a piece of footage, does some operations, and outputs 3 difference files. Let's call them output A, B, and C. I have the file output node with added sockets to output each. What this gives me in the output folder is each output followed by the frame number. For example, frame 1 will give me A-0001.png, B-0001.png, C-0001.png.

What I would like is to alter the frame number appended to the output files so that instead I would have A-0001.png, B-0002.png, C-0003.png. Frame 2 would then give A-0004, B-0005, C-0006.

The end result would triple the number of frames of the animation and have them interlaced.

Is this possible with the file output node? Is it possible with a script?
I'm maybe wrong but it seems there is no way to avoid Blender (2.8) to remove the frame number and the extension of the filename with CompositorNodeOutputFile object, as I'm rendering by a python script I finally fixed it by renaming the files with os.rename combined with a regular expression just after render.