Re: [GM-help] Reading raw files....

[Sam M. <sma...@ri...>]

Bob Friesenhahn wrote:
>   The -interlace parameter may be important.  Be sure to read the 
> documentation for the various parameters.
>
>
The -interlace parameter did need to be changed--I was mistaking "none" 
for what should have been "plane". This allows me to create jpeg files.

....But after much experimentation I am still unable to create a valid 
dpx file. To summarize:

Given my truly raw file data (generated from a program with no header, 
1920x1080 16bit RGB data in planar format, the following command works

gm convert -size 1920x1080 -depth 16 -endian lsb -interlace Plane 
rgb:"Z:\Temp\gm\PixelType_16Bit_RGB_Planar.raw" "Z:\Temp\gm\Converted.jpg"

to create a jpeg file.

Changing the suffix of the destination file from 'jpg' to 'tiff' or 
'tga' works fine, creating each of those files as readable in every 
graphics application I have.

However, changing the suffix to 'dpx' results in what appears to be a 
dpx file.
-An attempt to load that dpx into photoshop results in the error "Could 
not complete your request because the file-format module cannot parse 
the file."
-Eyeon Fusion won't load the resulting dpx at all.
-GMDisplay fails to load the image with the error: "IMDisplayDoc 
function [DoReadImage] reported an error. Magick: Unexpected 
end-of-file.......(ReadDPXImage)."
-The graphicmagick utility gm identify -format '%[dpx:*]' 
"Z:\Temp\gm\Converted.dpx" returns:
'DPX:file.version=V2.0
DPX:file.filename=Z:\Temp\gm\Converted.dpx
DPX:file.creator=GraphicsMagick 1.3.7 2009-09-17 Q16 
http://www.GraphicsMagick.org/
DPX:image.orientation=0
DPX:source.filename=Z:\Temp\gm\PixelType_16Bit_RGB_Planar.raw'

Any suggestions as to why the other formats might be working but DPX 
fails? It seems as though the DPX writer is completing the file. I've 
experimented with just about every flag I can think of in the docs (for 
DPX) but maybe I'm missing a combination somewhere....?

graphicsmagick version is 1.3.7 2009-09-17 Q16, running under windows 
vista 64.


-- 


Sam Marrocco
Chief Technical Officer
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248-910-3344 Cell
 
"Just because no one understands you doesn't make you an artist."

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