Re: [Openexr-devel] ZIP compression error

[Piotr Stanczyk]

Larry Gritz wrote:
> (Please excuse if this is a duplicate post.  I think my previous one 
> bounced because I didn't send from the same email I use to subscribe 
> to the list.)
>
> Using OpenEXR 1.6.1, I've had errors where the last few scanlines or 
> tiles don't seem to make it to the file I'm writing.  No exceptions, 
> no crash, no error messages.  The program ends normally.  But the 
> tiles or scanlines just aren't there, as revealed by errors when 
> subsequently reading the files.
>
> This ONLY happens when the image (or maybe just whole scanlines or 
> tiles?) is a solid color, and ONLY when using compression (I've only 
> seen it with zip, but a user says it can happen with piz.)  It doesn't 
> botch all scanlines/tiles that are constant, just the last one or few 
> of the file, even when the whole image is a solid color.  And it 
> doesn't seem to happen for certain resolutions or tile sizes.  But 
> when it does happen, it happens consistently.
>
> Anybody else seen this?
Not here, but do you happen to have a compilation of resolutions that 
look suspect? ...

Piotr