[Digikam-devel] [digikam] [Bug 314822] New: batch queue manager creates empty PNG output from PNG input

[jon33040 at yahoo.co.uk]

https://bugs.kde.org/show_bug.cgi?id=314822

            Bug ID: 314822
           Summary: batch queue manager creates empty PNG output from PNG
                    input
    Classification: Unclassified
           Product: digikam
           Version: 3.0.0
          Platform: Ubuntu Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Batch Queue Manager
          Assignee: digikam-devel at kde.org
          Reporter: jon33040 at yahoo.co.uk

I use the batch queue manager to add a watermark and metadata to PNG images
created in DK's own image editor. I just switched to DK 3.0.0-rc (in the
kubuntu-backports PPA with KDE 4.10) and now zero size PNG files are created.
I've tried various other tools in BQM and it's always the same, zero size PNG
files. If I add a 'convert to PNG' tool on the end then everything is fine.

Reproducible: Always

Steps to Reproduce:
1. Create a PNG file in the image editor (save as new version, save in format
PNG)
2. Add that to the current queue
3. Go to batch queue manager
4. Add a tool (e.g. border, watermark, metadata, flip, )
5. Run
6. Look at the results, a file with suffix '.PNG' and size 0.
7. Add a 'convert to PNG' tool
8. Run
9. Look at the results, a file with suffix '.png' and a reasonable size
Actual Results:  
A file with suffix '.PNG' and size 0

Expected Results:  
A file with suffix .PNG and size non-zero.

Here's the components information in case this is something off with
kubuntu-backports 4.10.

digiKam version 3.0.0-rc
Exiv2 can write to Jp2: Yes
Exiv2 can write to Jpeg: Yes
Exiv2 can write to Pgf: Yes
Exiv2 can write to Png: Yes
Exiv2 can write to Tiff: Yes
Exiv2 supports XMP metadata: Yes
LibCImg: 130
LibClapack: internal library
LibExiv2: 0.22
LibJPEG: 80
LibJasper: 1.900.1
LibKDE: 4.10.00
LibKExiv2: 2.3.0
LibKGeoMap: 2.0.0
LibKdcraw: 2.2.0
LibLCMS: 119
LibLensFun: external shared library
LibLqr: internal library
LibPGF: 6.12.27 - internal library
LibPNG: 1.2.46
LibQt: 4.8.2
LibRaw: 0.15.0-Beta1
LibTIFF: LIBTIFF, Version 3.9.5 Copyright (c) 1988-1996 Sam Leffler Copyright
(c) 1991-1996 Silicon Graphics, Inc.
Marble Widget: 0.14.90 (0.15 RC 1)
Parallelised demosaicing: No
Parallelized PGF codec: No
RawSpeed codec support: No
Database backend: QSQLITE
Kipi-Plugins: 3.0.0-rc
LibGphoto2: 2.4.14
LibKface: 2.0.0
LibKipi: 2.0.0
LibOpenCV: 2.3.1
Libface: 0.2

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