[cl-pdf-devel] pdf::read-jpeg-file

[Andrew Philpot]

Thanks, Patrick, for the heads-up to check out the version from
Quicklisp which does solve this problem, even though it is also
indicated to be version 2.03.
Andrew

On Mon, Sep 10, 2012 at 6:36 PM, Patrick Stein <pat at nklein.com> wrote:
>
> Are you trying this on Windows?  I had no problem reading this file with cl-pdf from the current quicklisp distribution under MacOSX.  I see some places it could signal 'image-file-parse-error, but not EOF.
>
> … Patrick
>
> On Sep 10, 2012, at 11:50 AM, Andrew Philpot wrote:
>
>> Running cl-pdf 2.1 (although the source tag says pdf::*version* = 2.03)
>>
>> I have a legacy cl-pdf application which embeds JPG files into the pdf
>> documents.  I've noticed that more and more JPGs that I encounter are
>> not accessible via PDF::READ-JPEG-FILE, that is, the underlying
>> PDF::%READ-JPEG-FILE% signals an EOF due to not recognizing some
>> marker byte. I'm guessing this is due to new camera capabilities or
>> new metadata from various image processing software; and I suppose
>> that PDF::%READ-JPEG-FILE% didn't anticipate some legal segment(s) in
>> the file.
>>
>> My current workaround is to run exiftool -all= <file> to drop all EXIF
>> metadata.  But I was wondering whether anyone has a patch to the JPG
>> reader, or has the expertise to look at this and the JPG specs and
>> ascertain what is going on.
>>
>> A sample non-readable image is available at
>> http://www.isi.edu/~philpot/qh2012/original.jpg
>>
>> Thanks!
>>
>> --
>> Andrew Philpot
>> andrew.philpot at gmail.com
>>
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>



-- 
Andrew Philpot
andrew.philpot at gmail.com