How can I run a python script when a render is finished?

[Daniel Scott Matthews]

I want to be able to run a script on the folder of animation frames
when the last frame is complete. At the moment I manually do the same
set of actions on the folder the animation frames are saved in.

I could watch a folder with a script so I know when frames go into it,
but they are not rendered in frame order and unless I tell the script
how many to expect it does not know when to process the set of frames.
In my case I want to convert to a video file and open it in vlc or
ffplay.

Is it possible to have a text property added to each engine that holds
a python script that is invoked when the render manager returns a
result? Per frame and per job (do we need two scripts?) and passes
messages to the script as to the results that were returned, i.e.
errors etc.


I have been playing with sending frames to LuxRender,
http://k-3d.org/blogs/dsmatthews/2009/10/11/rendering-animations-frames-with-luxrender/
, which works well except that I need more cores to get the job done
faster.

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[Timothy M. Shead]

Daniel Scott Matthews wrote:

> I want to be able to run a script on the folder of animation frames
> when the last frame is complete. At the moment I manually do the same
> set of actions on the folder the animation frames are saved in.
>
> I could watch a folder with a script so I know when frames go into it,
> but they are not rendered in frame order and unless I tell the script
> how many to expect it does not know when to process the set of frames.
> In my case I want to convert to a video file and open it in vlc or
> ffplay.
>
> Is it possible to have a text property added to each engine that holds
> a python script that is invoked when the render manager returns a
> result? Per frame and per job (do we need two scripts?) and passes
> messages to the script as to the results that were returned, i.e.
> errors etc.

I don't think there's a clean solution in the short-term; as you point
out, your script would have to use a heuristic to figure-out when
rendering is truly complete.

The right solution for the 0.9 time-frame would be to make this a
special-case of multi-pass rendering.  There, I see a hierarchy of
render engines in a scene, with one render engine at the root of the
hierarchy "calling" the others.  That implies a degree of coordination,
and it provides an opportunity for a scripted render-engine to do
per-pass, per-frame, or per-animation operations.  It's wonderful how
well it all works in my head ;)

Cheers,
Tim

[tshead.vcf]

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---

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