vrimg2exr taking a looooong time

[Erik de Graaf]

Hi,

We are trying to convert a vrimg file to an exr file, this is the first time for us and it is taking a very long time. How long is it supposed to take to convert a 6500x6500 pixel image of 1,6 Gb?

Thanks,

Erik

[vlado]

Since the file would be too big to fit in memory, vrimg2exr must convert it in several passes, each time reading only a portion of the file.

To speed the process up, use the -bufsize option and specify a larger buffer size for the conversion.

Best regards,
Vlado

[Erik de Graaf]

Okay,

Trying that right now, i set the buffer to 800. So how long can/should it take to convert an image of this size on a C2DE6600, considering that it is only a singlethreaded process.

edit: i wont expect you to say an exact amount of time but an estimation would be nice. I mean does it take 10 minutes or 10 hours.

[vlado]

The machine speed is quite irrelevant, since it is the disk IO that mostly affects the speed of the conversion. If you are converting a file over a network, it may take a lot longer. I have made tests with images up to 8000x8000 and the conversion never took more than some minutes.

Best regards,
Vlado

[Erik de Graaf]

A matter of minutes .

This is what we are doing:


It has been like this for an hour and still nothing.

Are we doing something wrong?

[vlado]

Then there is probably something wrong... are you using the vrimg2exr from the V-Ray installation?

Best regards,
Vlado

[Erik de Graaf]

Yes, i wasn't at first but after some forum browsing i found out that it could be found in the vray install dir, so i am using the latest version.

edit: We did a test with a lowres image and it worked fine, it is just the high res image that is giving us trouble. I am starting to think the vrimg file is corrupt