Re: DPX reader vs. Northlight scans with infra-red pass

On 29 Aug 2008, at 22:40, Bob Friesenhahn wrote:
> Since the data is not actually alpha, the results would be odd if  
> it is saved to other formats.  Particularly saving to TIFF could be  
> a disaster since the alpha is pre-multiplied with the pixels.

Yes, it'd need to be unassociated alpha.  I think it would be fair to  
expect people to have to explicitly request no premult
when writing - it's something we tend to think about carefully  
anyway :)  We use alpha channels for all kinds of things other than  
just a transparency mask for the entire image, so un-premult'd is  
common around here, probably unlike most users.

>> using "gm mogrify -define dpx:mp.frame.rate=25 0899992.dpx"
> Try putting the -define after the file name.  Maybe that will work  
> since there is an image to attach it to.

Sadly same error - "gm mogrify: Unexpected end-of-file (0899992.dpx)."

-- 
Lewis Saunders
Compositor
Molinare, London


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