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Sgi header issue
Posted: 2016-09-21T05:59:56-07:00
by monark
I'm finding a random error where Imagemagick fails to load some sgi's due to what it thinks is a header error
This is the error
magick: improper image header `I:/Ifa2/Actions/Render/Pushup/Motion1/Layer2\stills\sgi\0841.sgi' @ error/sgi.c/ReadSGIImage/535
magick: no image to apply a property "%w" @ warning/property.c/GetMagickPropertyLetter/2550.
magick: unknown image property "%w" @ warning/property.c/InterpretImageProperties/3489.
magick: no image to apply a property "%h" @ warning/property.c/GetMagickPropertyLetter/2438.
magick: unknown image property "%h" @ warning/property.c/InterpretImageProperties/3489.
magick: no image to apply a property "%m" @ warning/property.c/GetMagickPropertyLetter/2469.
magick: unknown image property "%m" @ warning/property.c/InterpretImageProperties/3489.
I can't see how to upload an image or I would post an example one.
Other programs like Xnview are able to read the file with no issues
The files with issues are part of a large sequence where every other image loads fine, it just seems to have an issue with odd random single files.
Even if I re-save it from Xnview it comes up with the same error.
Even if I save it as a png and then re-save it as an sgi I still get the error, nothing clears it.
I'm using this commandline
'magick ' + sgiPath + ' -background gray(95%) -alpha remove ' + jpgPath
Imagemagick version is ImageMagick-7.0.3-Q16
Re: Sgi header issue
Posted: 2016-09-21T07:48:32-07:00
by snibgo
You can upload to somewhere like dropbox.com, and paste the URL here.
Re: Sgi header issue
Posted: 2016-09-23T05:44:59-07:00
by monark
Re: Sgi header issue
Posted: 2016-09-23T09:19:06-07:00
by fmw42
On my Mac OSX with Imagemagick 6.9.5-10 Q16 or 7.0.3-1 Q16, it seems to work fine.
Code: Select all
Image: 0041.sgi
Format: SGI (Irix RGB image)
Class: DirectClass
Geometry: 660x660+0+0
Units: Undefined
Type: TrueColorAlpha
Endianess: Undefined
Colorspace: sRGB
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
alpha: 8-bit
Channel statistics:
Pixels: 435600
Red:
min: 0 (0)
max: 255 (1)
mean: 9.50784 (0.0372857)
standard deviation: 39.3359 (0.154258)
kurtosis: 17.8598
skewness: 4.31376
entropy: 0.10717
Green:
min: 0 (0)
max: 255 (1)
mean: 10.0065 (0.0392413)
standard deviation: 40.2062 (0.157671)
kurtosis: 15.3567
skewness: 4.05375
entropy: 0.106005
Blue:
min: 0 (0)
max: 249 (0.976471)
mean: 7.7673 (0.03046)
standard deviation: 32.6173 (0.127911)
kurtosis: 18.6877
skewness: 4.40655
entropy: 0.105675
Alpha:
min: 0 (0)
max: 255 (1)
mean: 15.577 (0.0610862)
standard deviation: 60.3983 (0.236856)
kurtosis: 11.4984
skewness: -3.66378
entropy: 0.0543975
Image statistics:
Overall:
min: 0 (0)
max: 255 (1)
mean: 66.6762 (0.261475)
standard deviation: 44.3725 (0.17401)
kurtosis: 78.3952
skewness: 16.0696
entropy: 0.0933121
Alpha: none #00000000
Rendering intent: Perceptual
Gamma: 0.454545
Chromaticity:
red primary: (0.64,0.33)
green primary: (0.3,0.6)
blue primary: (0.15,0.06)
white point: (0.3127,0.329)
Background color: white
Border color: srgba(223,223,223,1)
Matte color: grey74
Transparent color: none
Interlace: None
Intensity: Undefined
Compose: Over
Page geometry: 660x660+0+0
Dispose: Undefined
Iterations: 0
Compression: RLE
Orientation: Undefined
Properties:
date:create: 2016-09-23T09:17:02-07:00
date:modify: 2005-09-23T13:51:22-07:00
label: H:/Ifa2/Actions/Render/Pushup/Motion1/Layer2/stills/sgi/0041.sgi
signature: c9c4d63579b5ef5f3f0034db905fb196a2170516d933b287a345ece524a5ccd4
Artifacts:
filename: 0041.sgi
verbose: true
Tainted: False
Filesize: 157KB
Number pixels: 436K
Pixels per second: 21.78MB
User time: 0.030u
Elapsed time: 0:01.019
Version: ImageMagick 6.9.5-10 Q16 x86_64 2016-09-21 http://www.imagemagick.org
and
No header or other errors reported.
This also works fine:
Code: Select all
magick 0041.sgi -background "gray(95%)" -alpha remove 0041.jpg
On Unix-like platforms, you should put quotes around any color specification other than a named color.
What is your platform? I did not see that mentioned.
Re: Sgi header issue
Posted: 2016-09-23T09:40:33-07:00
by monark
hmm me too, so why does it like being called from inside a python script... unless I copy the wrong example file....will investigate on Monday
Re: Sgi header issue
Posted: 2016-09-23T09:43:07-07:00
by fmw42
magick: improper image header `I:/Ifa2/Actions/Render/Pushup/Motion1/Layer2\stills\sgi\0841.sgi' @ error/sgi.c/ReadSGIImage/535
Your path has both forward and back slashes. Is that intentional? Why the mixed notation (unix vs windows)?
Re: Sgi header issue
Posted: 2016-09-23T09:47:07-07:00
by monark
Python tends to do that when dealing with windows paths unless you force it not to. As I say it's processed in the region of 100 thousand files without complaint but in the case of about a dozen I get the above error.
Looks like I can at the very least process them by hand, but I'd like to get to the bottom of why as finding them is very time consuming.
Re: Sgi header issue
Posted: 2016-09-23T10:04:47-07:00
by fmw42
If you looped over this image multiple times, would it fail every time? Perhaps you are running out of resources, such as temp space or exceeding some other limit.
Re: Sgi header issue
Posted: 2016-09-23T10:07:33-07:00
by monark
oh I see I did copy the wrong file, it should have been 0841.sgi not 0041.sgi, I'm totally losing it
Try this one
http://stage.anatomy.tv/atv2/bug/0841.zip
Sorry for the confusion. At least you have an example of a good one and a bad one, both generated originally in identical fashion.
Re: Sgi header issue
Posted: 2016-09-23T10:42:21-07:00
by fmw42
Yes, that one is corrupt.
identify: improper image header `0841.sgi' @ error/sgi.c/ReadSGIImage/541.
But I cannot help further to tell you why.
Re: Sgi header issue
Posted: 2016-09-23T11:06:35-07:00
by fmw42
I was able to open the file in another tool and it has horizontal broken stripes of color in the middle of the file. Looks like the rows have become jumbled or offset.
Re: Sgi header issue
Posted: 2016-09-26T01:49:51-07:00
by monark
Hmm ok that one was clearly a bad example seems that there must be more than one issue here.
Let's try this one, this one opens fine in xnview just double chacked it.
And gives me this error when I try and convert it
magick: improper image header `0001.sgi' @ error/sgi.c/ReadSGIImage/535.
magick: no image to apply a property "%w" @ warning/property.c/GetMagickPropertyLetter/2550.
magick: unknown image property "%w" @ warning/property.c/InterpretImageProperties/3489.
magick: no image to apply a property "%h" @ warning/property.c/GetMagickPropertyLetter/2438.
magick: unknown image property "%h" @ warning/property.c/InterpretImageProperties/3489.
magick: no image to apply a property "%m" @ warning/property.c/GetMagickPropertyLetter/2469.
magick: unknown image property "%m" @ warning/property.c/InterpretImageProperties/3489.
http://stage.anatomy.tv/atv2/bug/0001.zip
Re: Sgi header issue
Posted: 2016-09-26T10:33:00-07:00
by fmw42
I suspect that your file is not formed to full specifications and IM will balk at the bad header. Other tools may be more forgiving. I still get your error.
identify: improper image header `0001.sgi' @ error/sgi.c/ReadSGIImage/541.
Final say will have to come from one of the IM developers.
What tool is creating these files?
Re: Sgi header issue
Posted: 2016-09-27T01:57:35-07:00
by monark
These come from a 3d package, Houdini from Sidefx. They are usually spot on with specs. What's odd is these ones come from the compositor not straight from the renderer.
And what I don't understand is even if I re-write them or save them to another format it still chokes.
You'd think writing as a png would change the header.
Re: Sgi header issue
Posted: 2016-09-27T09:01:15-07:00
by fmw42
If the IM software cannot read the file and complains about the header being malformed, then it won't write the file.
The IM developer will need to look at the file and see what is wrong with the header.
If it is truly malformed and they cannot fix it, then you may have to convert it with some other tool that is more forgiving.