Legacy ImageMagick Discussions Archive

I wrote a little script to scan my photo collection / backups for errors using "identify" ("reports if an image is incomplete or corrupt"). Unfortunately it doesn't work. I tested it by null-bombing an image file using dd. (I repeated this a couple of times with different settings).

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dd conv=notrunc seek=30 count=1 if=/dev/zero of=test.jpg

Identify doesn't notice the corruption:

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$ identify test.jpg
test.jpg JPEG 3409x2392 3409x2392+0+0 8-bit DirectClass 1.216MB 0.000u 0:00.000
$ echo $?
0

Here's my version information:

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# libjpeg package has the version number "6b-15ubuntu1"

$ identify --version # (compiled from source)
Version: ImageMagick 6.7.1-10 2011-08-25 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2011 ImageMagick Studio LLC
Features: OpenMP

$ ldd `which identify`
        linux-vdso.so.1 =>  (0x00007fff839ff000)
        libMagickCore.so.4 => /usr/local/lib/libMagickCore.so.4 (0x00007ffd64e9a000)
        libMagickWand.so.4 => /usr/local/lib/libMagickWand.so.4 (0x00007ffd64baa000)
        libtiff.so.4 => /usr/lib/libtiff.so.4 (0x00007ffd64947000)
        libc.so.6 => /lib/libc.so.6 (0x00007ffd645c4000)
        libjpeg.so.62 => /usr/lib/libjpeg.so.62 (0x00007ffd643a0000)
        libpng12.so.0 => /lib/libpng12.so.0 (0x00007ffd64178000)
        libz.so.1 => /lib/libz.so.1 (0x00007ffd63f61000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x00007ffd63d44000)
        libltdl.so.7 => /usr/lib/libltdl.so.7 (0x00007ffd63b39000)
        libdl.so.2 => /lib/libdl.so.2 (0x00007ffd63935000)
        libgomp.so.1 => /usr/lib/libgomp.so.1 (0x00007ffd63727000)
        libm.so.6 => /lib/libm.so.6 (0x00007ffd634a3000)
        /lib64/ld-linux-x86-64.so.2 (0x00007ffd6542d000)
        librt.so.1 => /lib/librt.so.1 (0x00007ffd6329b000

But if I use Firefox instead, the corruption is detected correctly:

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$ firefox "/home/jenkins-photos/1925 - 2009 Ken/1993 Young Alice 'helping' Grandad.jpg"
Corrupt JPEG data: premature end of data segment
Corrupt JPEG data: premature end of data segment

"convert" works, but it's not easily scriptable, because it still returns a "success" exit code.

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$ convert test.jpg /dev/null
convert: Corrupt JPEG data: premature end of data segment `test.jpg' @ warning/jpeg.c/JPEGWarningHandler/325.
$ echo $?
0

I can't find a "-strict-errors" option. (What I'd really prefer is aborting on errors by default, which would be a good idea for user scripts / batch use in general).

You want:

-regard-warnings pay attention to warning messages

"identify" doesn't read the entire image. Try "identify -verbose" which does read it all.

Both of those work as you describe. Thanks!

I'm currently using:
- ImageMagick-6.2.4-5-Q8-windows-dll.exe 32-bit,
- ActivePerl-5.8.7.813 32-bit,
- windows 2008 R2 Std 64-bit.

In this configuration, the detection of corrupted JPEG files works as expected, ie returns a message:
Exception 325: Corrupt JPEG data: premature end of data segment 'file.jpg'
both when calling:
- "identify.exe corrupted.jpg"
- Read method of PerlMagick: $result = $i->Read( 'corrupted.jpg' );

I tested the following configurations:
- ImageMagick-6.8.5-7-Q8-x86-dll.exe with ActivePerl-5.16.3.1603 (Windows 2008 R2 64-bit),
- ImageMagick-6.8.0-Q8 with ActivePerl-5.14.2 32-bit (Windows 2003 32-bit),
- ImageMagick-6.7.7-Q16 64-bit with ActivePerl 5.14.2 64-bit (Windows 7 64-bit).

In all these configurations, both Read method of PerlMagick and "identify.exe -regard-warnings corrupted.jpg"
does not detect corrupted JPEG files - no warning message.

BTW, how to use Identify method of PerlMagick, regardless of the version of IM my perl script:

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my $FileJPG = 'corrupted.jpg';
my $Img = Image::Magick->new;
my $Wynik = $Img->Read( $FileJPG );
open( IMAGE, $FileJPG );
my $Result = $Img->Identify( file => \*IMAGE );
close( IMAGE );

crashes with following errors in windows application event log:
no such element in list `c'
no such element in list `Image'
unable to open module file `C:\Program Files (x86)\ImageMagick-6.2.4-Q8\modules\coders\IM_MOD_RL_Image_.dll': No such file or directory
no such element in list `JPG'
Faulting application name: perl.exe, version: 5.8.7.813, time stamp: 0x42a4b40a
Faulting module name: ntdll.dll, version: 6.1.7600.16915, time stamp: 0x4ec49d10

Any advice is welcome.

Legacy ImageMagick Discussions Archive

identify doesn't detect corrupt JPEG files (Firefox does)

identify doesn't detect corrupt JPEG files (Firefox does)

identify doesn't detect corrupt JPEG files

Re: identify doesn't detect corrupt JPEG files (Firefox does

Re: identify doesn't detect corrupt JPEG files (Firefox does

Re: identify doesn't detect corrupt JPEG files (Firefox does

Re: identify doesn't detect corrupt JPEG files (Firefox does