Re: [Openexr-devel] Slow deep exr

[Gonzalo Garramuño]

El 29/05/17 a las 01:27, Peter Hillman escribió:
> Hi Gonzalo,
>
> I haven't been able to check the file but I assume it contains one 
> deep part and one regular image part for the beauty. EXRs are slow if 
> the data for parts is interleaved - when the file was written, Arnold 
> possibly alternated between writing scanlines of deep and scanlines of 
> regular image; reading back the beauty picture might require a skip 
> every scanline, which can be quite time consuming.
>
> Try running "exrstdattr input.exr output.exr" (no extra arguments 
> required) and see if output.exr is faster
Hi, Peter.

Your analysis is what I suspected, but using exrstdattr did not make any 
difference.  The output file is still slow to load the beauty picture.  
I have no way of finding out whether the beauty and the deep data are 
interleaved or not.

Thanks for the help,

--
Gonzalo Garramuño