launching VFB renders from a python script

[djx]

We use a python script to launch test renders in the VFB but we have a problem. If window focus changes (eg click in another window) then the render will freeze and maya will stop responding and must be killed from task manager. This only seems to be a problem if we are using VFB.

This is the python commands we are currently using.

import maya.mel as mel
cmd = 'vrend -width 1024 -height 576 -camera cameraShape -layer layerA'
mel.eval(cmd)

If we do it with mel like this
vrend -width 1024 -height 576 -camera cameraShape -layer layerA;
then there is no problem.

We would really like to get this working with python, so I attached a simple test scene if you want to have a look.

Thanks in advance.
David

[milena.sarneva]

I am able to reproduce it even with a very simple scene, all I need is to start rendering from python script when VFB is on.
I will look into it, thanks a lot for pointing it. My bet for now if a multithread issue.

[djx]

Just wondering if any progress has been made on this one.
Currently we are working around the problem by creating a mel scriptJob which launches the render. We then trigger the scriptJob via our python script.

cheers
David

[milena.sarneva]

Not yet, sorry. Will post here (and PM you) when I find a solution. Sorry for the inconvenience.

[djx]

Thanks Milena.
Actually the workaround with the script job solves the problem for us. Its just not very pretty from a programming point of view.