Re: [Openexr-devel] Trouble creating deep scanline files

[Chip Collier]

Thanks Halfdan,

I've tried it both ways but get the same results. 

exrheader reports:

test.exr (incomplete file):

file format version: 2, flags 0x800

channels (type chlist):

    O, 16-bit floating-point, sampling 1 1

    Z, 32-bit floating-point, sampling 1 1

chunkCount (type int): 32

compression (type compression): none

dataWindow (type box2i): (0 0) - (31 31)

displayWindow (type box2i): (0 0) - (31 31)

lineOrder (type lineOrder): increasing y

pixelAspectRatio (type float): 1

screenWindowCenter (type v2f): (0 0)

screenWindowWidth (type float): 1

type (type string): "deepscanline"

version (type int): 1

And exrdisplay bails with:

Error reading sample count data from image file "test.exr". Unexpected data block y coordinate.

If I increase the resolution I can load it with exrdisplay (unless I enable compression). 

Someone suggested I create a deep file in Nuke and see how that's laid out. 

Thanks,

Chip

On Wed, Apr 17, 2013 at 9:57 AM, Halfdan Ingvarsson <address@hidden> wrote:

At first glance, it looks like your x and y indices are reversed.

The outermost bracket increases fastest and should therefore be indexed by x.

E.g:

Imf::Array2D<unsigned int> sampleCount; sampleCount.resizeErase(yRes, xRes);

...

for (int y=0; y < yRes; y++) {
   for (int x=0; x < xRes; x++) {
      sampleCount[y][x] = sampleSize;
...
   exrFile.writePixels(1);


Hope that helps,

 - ½

On 13-04-17 12:33 PM, Chip Collier wrote:

Good morning folks!

I'm trying to convert deep rat images into OpenEXR deep scanline images using the current 2.0.0 release on openexr.com.

At this point I haven't been able to create a valid file and I am at a loss to understand why. 

Here is a super simple test based on the documentation and it doesn't create a valid file: http://hastebin.com/webasetiyo.cpp

Does anyone see anything blatantly wrong with this? Any advice would be helpful!

Thanks,

Chip

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