Re: [Openfx-developer] Openfx examples in Nuke, problems and fixes

[Pau G. <pau...@gm...>]

Fabien,

thanks for the answer and the pointer to your plug-ins, they will be
very useful.

After catching the kOfxStatFailed when fetching the images the
examples work fine. I'll send a patch with the changes I've made.

I'm using the last version of Nuke on a 64bits linux, but I've
compulsively tried a bunch of versions from the Foundry's ftp, to see
if the error happened only some of them. As it turned out, it was not
a version problem but an oversight in the example.

cheers,
pau



On Tue, Dec 21, 2010 at 5:10 PM,  <fab...@fr...> wrote:
> Hi,
> The default examples are not really great.
> Effectively, nuke often returns an empty image (I don't know why) and you have to return an error. And nuke does the process again, with a good image...
> We have created an open source project for openfx plugins and a library to batch a graph of openfx nodes. The project is still under early development, but you can found a bunch of plugin examples, simple or advanced ones.
> https://github.com/tuttleofx/TuttleOFX/tree/master/plugins/image/process
> There is no documentation, so if you have any question, don't hesitate to ask me.
> To build see INSTALL.scons (the bjam version is no more used and so not up to date).
>
> Regards,
> Fabien Castan
>
> PS: which version of nuke are you using ? There is many openfx bug fixes in nuke >= 6.0.
>
> ----- Mail Original -----
> De: "Pau Gargallo" <pau...@gm...>
> À: ope...@li...
> Envoyé: Mardi 21 Décembre 2010 13h01:37 GMT +01:00 Amsterdam / Berlin / Berne / Rome / Stockholm / Vienne
> Objet: [Openfx-developer] Openfx examples in Nuke, problems and fixes
>
> Hi all,
>
> I'm new to OpenFX. I've downloaded the headers and examples, compiled
> them and loaded them into Nuke without problems. The problems arrive
> when I actually use the plug-in examples. They work properly as long
> as you do not move the sliders too much. But as soon as you move a
> slider (any of them) a bit to fast, Nuke crashes.  I've tried multiple
> combinations of Nuke and OpenFX versions both on linux and mac, and
> had always the same crash.
>
> The problem seems to be that the render method in the examples does
> not check the validity of the source image. The call
>
>     gEffectHost->clipGetImage(myData->sourceClip, time, NULL, &sourceImg);
>
> in line 667 of the basic.cpp example, is sporadically returning
> kOfxStatFailed, but the return value is ignored.
>
> What is the proper way to handle such failure?
> Should the code in the examples be modified to handle this?
>
> Thanks in advance,
> pau
>
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