[digiKam-users] Read Error in windows version but not in linux version

[Simon Cropper]

In my mind this seems to imply that your directory, file names and maybe 
even your associated metadata have characters not shared between Linux 
and Windows.

Linux uses UTF-8 while Windows CP-1252. They are different code pages 
and when characters unique to one or other code page is used in a system 
that is not code-page aware -- like Windows, the programs get upset.

The only way to resolve the issue is to fix the offending paths, file 
names or metadata.

This is applicable for any program and is not unique to DigiKam.

Although this may not be the main problem, my understanding is that the 
path of files are stored as UUID+Path. I am not sure how robust the 
conversion routines are converting paths between Linux/UNIX format and 
Windows Format. Some of the issues may relate to this. Certainly most 
people report problems when moving their data between drives as this 
changes the UUID.

If I have the time, to test, I'd create one directory with a small 
number of files. Check all of them for any character that is are not 
a-z, A-Z, 0-9, space and _

Duplicate on your NAS.

Try creating a database in Linux using one of the directories.
Try creating a database in Windows using the other directory.

Try adding the Linux directory to Windows install and visa versa. I 
suspect this won't work. If it does, then the issue you are reporting is 
probably just code page incompatibility and you need to seek out the 
offending characters.

*@Gilles -- This list regularly gets queries about how to setup a 
central photo repositories and have multiple clients looking into the a 
single database. In most cases, like Clive its involves mixed operating 
systems. I have never seen a clear response from the developers if this 
is even feasible. Can you please clarify?**
*
On 09/07/18 02:01, Gilles Caulier wrote:
> Hi,
>
> This message do not come from digiKam directly, but from Exiv2 shared 
> library. It's not a bug as the message is clear : it's a limitation.
>
> Now the question is why it appear under Windows and not Linux. I don't 
> know. The Question must be posted to Exiv2 team, to be clear.
>
> Best
>
> Gilles Caulier
>
> 2018-07-08 13:40 GMT+02:00 cliver <clive at reynoldscrc.me.uk 
> <mailto:clive at reynoldscrc.me.uk>>:
>
>     Hi all,
>     I'm new to Digikam and image management in general so please bear
>     with me.
>
>     I am trying to organise all my old photos and maintain things
>     ongoing. I
>     have a collection of older images, mainly jpegs and some newer RAW
>     images
>     taken from a Nikon D7200 camera. All stored on a local NAS.
>
>     I have 2 instances of Digikam installed.
>     Version 5.6.0 on a laptop running Ubuntu Mate
>     Version 5.9.0 on an different Laptop running Windows 10
>
>     I installed the Ubuntu version first and set it up and it seems to be
>     running OK. However my windows 10 laptop is far more powerful so I
>     decided
>     to try the windows version.
>     On this instance when I set up Digikam the same and add the same
>     NAS  folder
>     as a collection I get a load of errors when I run Digikam and when
>     I try to
>     open any of the RAW images downloaded from the camera.
>
>     The errors I am getting are:
>       Read Error at Scanline xxxxxxx, got 252 bytes, expected 8160
>       Unknown Field with tag 36867 (0x9003) encountered
>       ASCII value for TAG 'Copyright' contains null byte in value
>       Value incorrectly truncated during reading due to implementation
>     limitations
>
>     These errors despite reading exactly the same files in both instances.
>
>     So my question:
>     Have I missed something in the setup on the windows version?
>     Or is this a bug in the Windows version of Digikam?
>     Or perhaps a bug in either the Nikon camera software or even
>     windows (heaven
>     forbid ;)
>
>     I am contemplating setting the windows machine to dual boot linux
>     but it's
>     brand new and still under warranty so would like to at least delay
>     that if I
>     can.
>
>     Can anyone guide me as to the best way forward in getting it to run on
>     windows?
>
>     Thanks and Regards
>     Clive
>
>
>
>
>     --
>     Sent from:
>     http://digikam.1695700.n4.nabble.com/digikam-users-f1735189.html
>     <http://digikam.1695700.n4.nabble.com/digikam-users-f1735189.html>
>
>

-- 
Cheers Simon

Simon Cropper
Principal Consultant
Botanicus Australia Pty Ltd
M: 0420 531 754.
W: http://www.simonchristophercropper.com

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