vrimg2exr converter

[Dynedain]

Perhaps this should be added to the Vray Tools section in the support area of the site?

[natty]

Ah .. i see

[vlado]

Perhaps this should be added to the Vray Tools section in the support area of the site?

Yeah, will get to that some time soon It was easier to post it here for now.

Best regards,
Vlado

[powerandrubber]

Just thought I'd post a link to a hdr2exr converter that I found http://hem.bredband.net/b230591/hdr2...2exr_win32.zip

[nlo]

z-channel export would be great too...
it would make my life a lot easier... :P

[dgsantana]

I have to say that this little util saved us a lot, today is a deadline for a project and every render was crashing (with 3gb and dynamic). Rendering to vrimg (no framebuffer and max set to 20x16), save a 1,2Gb of diference in memory it was getting to 2.5Gb and crashing (no dynamic) and with dynamic didn't event start the render at all.

Best regards,
Daniel Santana
4+Arquitectos, Lda

[jonasa]

...is there a memory limit on this vrim2exr converter?

I have succesfully converted smaller files before, but this time I'm trying to convert a 3.3 Gb vrimg file to exr with this tool and it crashes.

Or is it because I only have 2Gb of Ram on my workstation?

[vlado]

...is there a memory limit on this vrim2exr converter?

At present the converter tries to load the entire image into memory before writing it, so in an indirect way there is a memory limit - Windows will not give more than about 2.75 GB of RAM to any application, even with the /3GB switch on.

If you have more than one channels in the image, you can try to convert them one by one using the -channel option, as this will only load the specified channel, instead of all channels.

Other than that, you can try to convert on a machine with 64-bit windows. If that doesn't work either, there is a 64-bit version of the converter that will probably work.

Best regards,
Vlado

[jonasa]

alright... thought it might be something like that...

I was trying to do a very hires render for a building wrap, and thought VRimg might be the way... so no channels i can discard and I don't have a 64bit XP...

Back to render strips.

Could be good if you could choose what bit-depth you want the VRimg to be - floating point is sometimes a bit over the top.

[panthon]

Has anyone tried to build a simple interface for this application? I would do it myself, but it´s far beyond my programming skills...

[mike.edel]

well, considering the amount of pain it causes to get error-safe file selection dialogs and the other stuff i find it easier to resort to the command-line


you'd have to edit batch files for more complex stuff tho' (multiple file conversion)

using maxscript for calling it would defeat the purpose of a standalone tool so one would have to write something in 'real' programming languages

my java is pretty rusty right now... (not to speak of c++ and the likes)

@vlado: shouldnt it be possible to read the vrayimage files in scanlines while converting to other formats that use scanlines? you would only have to keep one scanline in memory that way.
i think i remember tif files supporting saving scanline by scanline

[jujubee]

Side-note for some people - 'drag and drop' appears to work pretty well in case you were doing everything command-line before.

[vlado]

shouldnt it be possible to read the vrayimage files in scanlines while converting to other formats that use scanlines? you would only have to keep one scanline in memory that way.
i think i remember tif files supporting saving scanline by scanline

It's a little more complicated as the image is not written in scanline order in the .vrimg file - it just contains the buckets, as they get rendered, in whatever order they are rendered. I suppose some optimization on memory usage is possible though, where the image is converted in several passes, so it's definitely something to consider.

Best regards,
Vlado

[n6]

Has anyone tried to build a simple interface for this application? I would do it myself, but it´s far beyond my programming skills...

yep, a very small interface would be greatly welcome...Vlado

Or is there any free tool to build my own interface that would work with the converter?

[dgsantana]

Well a did a small frontend it uses net 2.0 (didn't have time for anything more elaborated). http://www.4arq.net/stuff/vr2img.zip
It had quite some use in our last project but may contain some bugs, feel free to use it in anyway you want. There is a small config file to specify where the true vray2image converter is.

Best regards
Daniel Santana