Execute render with python

[Rikrok]

I'm trying to write out multiple variations of the same object as fbx's (I have to use fbx), the object is set to change every frame. Unfortunately when you set a frame range on the the Filmbox FBX ROP you don't get multiple fbx's, you just get one with a point cache.

I put a script on the object to change the start and end frame of the ROP to the current frame (which works), followed by
hou.parm('/out/filmboxfbx1/execute').pressButton()
Which when pressing play writes out a bunch of fbx's but unfortunately they're all empty; the script gives an infinite recursion in evaluation error.

I then tried making a tool that runs a script
for n in range (1, 101):
       hou.setFrame(n)
       hou.parm('/out/filmboxfbx1/execute').pressButton()

This only writes out 1 frame. I even tried using threading and sleep incase it was because it was executing the render button too quickly, no dice.

Does anyone know how I can achieve this?

[Atom]

Have you tried the basic frame number in the Output file name?

$HIP/out_$F4.fbx

 

[Rikrok]

57 minutes ago, Atom said:

Have you tried the basic frame number in the Output file name?

$HIP/out_$F4.fbx

 

That's the first thing I did

[Atom]

Maybe you could try a post-processing rename on the file that is written out? At this link is some code where I re-write an OBJ file right after it is written. A python rename might do the trick?

[Rikrok]

The issue is with the Filmbox ROP - if you tell it to write more than one frame it will under no circumstances write out multiple fbx's; it assumes you want one fbx with a cache. Therefore I need to set it to write one frame, render, change the frame, render, etc.