[digiKam-users] Digikam-6.4.0 or 7.0.0.beta give : Unknown image format !!!

Tue Mar 31 23:13:16 BST 2020

Dear Maik, thanks for very quick answer,

Now Digicam is compiled with -DCMAKE_BUILD_TYPE=Debug

You are right, running digikam says:
digikam.general: Parsing plugins from "/opt/qt5/plugins/digikam/"
digikam.general: Plugins found: 0
digikam.general: No plugins loaded. Please check if the plugins were 
installed in the correct path, or if any errors occurred while loading 
plugins.

The directory /opt/qt5/plugins/digikam doesn't exist on my system 
(qt-5.12.7, but it is the same with qt-5.14.1)

I realized that digikam installs its plugins in /usr/lib/plugins/digikam/*
so, I made a symlik : ln -vs /opt/qt5/plugins/digikam -> 
/usr/lib/plugins/digikam
and now all is working well !!

How can I compile digikam so that it searches for plugins in 
/usr/lib/plugins/digikam rather than in /opt/qt5/plugins ?
I don't find anything about this in ccmake ..

Thanks for your help.
Best regards.
Alain

By the way, here is the full log of the debug release :
export QT_LOGGING_RULES="digikam*=true"
digikam

Attribute Qt::AA_ShareOpenGLContexts must be set before QCoreApplication 
is created.
digikam.widgets: Use installed icons
digikam.general: Switch to widget style:  "Fusion"
digikam.general: Switch to application font:  QFont( "Noto 
Sans,10,-1,0,50,0,0,0,0,0" )
digikam.general: AlbumWatch is disabled
digikam.general: Database Parameters:
    Type:                     "QSQLITE"
    DB Core Name:             "/pub/multimedia/album/digikam4.db"
    DB Thumbs Name: "/pub/multimedia/album/thumbnails-digikam.db"
    DB Face Name: "/pub/multimedia/album/recognition.db"
    DB Similarity Name:       "/pub/multimedia/album/similarity.db"
    Connect Options:          ""
    Host Name:                ""
    Host port:                -1
    Internal Server:          false
    Internal Server Path:     ""
    Internal Server Serv Cmd: ""
    Internal Server Init Cmd: ""
    Username:                 ""
    Password:                 ""

digikam.dbengine: Loading SQL code from config file 
"/usr/share/digikam/database/dbconfig.xml"
digikam.dbengine: Checking XML version ID => expected:  3 found:  3
digikam.coredb: Core database: running schema update
digikam.coredb: Core database: have a structure version  10
digikam.coredb: Core database: makeUpdates  10  to  10
digikam.database: Creating new Location  "/multimedia/album" uuid  
"volumeid:?uuid=76c91ffe-82bc-45cc-a5b8-76644f4eb82e"
digikam.database: location for  "/pub/multimedia/album"  is available  true
KMemoryInfo: Platform identified :  "LINUX"
KMemoryInfo: TotalRam:  16739758080
digikam.general: Allowing a cache size of 200 MB
digikam.thumbsdb: ThumbDB SelectThumbnailSetting val ret =  0
digikam.thumbsdb: ThumbDB SelectThumbnailSetting val ret =  0
digikam.thumbsdb: Thumbs database: have a structure version  "3"
digikam.general: Thumbnails database ready for use
digikam.similaritydb: SimilarityDb SelectSimilaritySetting val ret =  0
digikam.similaritydb: SimilarityDb SelectSimilaritySetting val ret =  0
digikam.similaritydb: Similarity database: have a structure version  "1"
digikam.similaritydb: Similarity database ready for use
digikam.dimg: ("/usr/share/color/icc")
digikam.general: Does not contain  "Comment"  Namespace
digikam.dimg: No X.org XICC profile installed for screen  0
digikam.general: Camera XML data: 
"/home/alain/.local/share/digikam/cameras.xml"
digikam.general: Starting to load external tools.
digikam.general: Parsing plugins from "/opt/qt5/plugins/digikam/"
digikam.general: Plugins found: 0
digikam.general: No plugins loaded. Please check if the plugins were 
installed in the correct path, or if any errors occurred while loading 
plugins.
digikam.general: void Digikam::DPluginLoader::Private::loadPlugins() 
Time elapsed: 0 ms
digikam.facedb: FaceDB SelectFaceSetting val ret =  0
digikam.facedb: FaceDB SelectFaceSetting val ret =  0
digikam.facedb: Face database: have a structure version  "3"
digikam.facesengine: Face database ready for use
digikam.general: Face PipeLine: add database writer
digikam.general: Face PipeLine: add faces trainer
digikam.facesengine: Face database ready for use
digikam.general: Face PipeLine: add database writer
digikam.general: Face PipeLine: add faces trainer
digikam.geoiface: "setting backend marble"
digikam.general: Stacked View Mode :  0
digikam.geoiface: "setting backend marble"
digikam.geoiface: "setting backend marble"
digikam.general: "browse_album"
digikam.general: "browse_tag"
digikam.general: "browse_labels"
digikam.general: "browse_date"
digikam.general: "browse_timeline"
digikam.general: "browse_search"
digikam.general: "browse_fuzzysearch"
digikam.general: "browse_gpssearch"
digikam.general: "browse_people"
digikam.widgets: Paths to color scheme : ("/usr/share/digikam/colorschemes")
digikam.widgets: ""  ::  ""
digikam.widgets: ""  ::  ""
QFSFileEngine::open: No file name specified
kf5.kxmlgui: Unhandled container to remove :  Digikam::DigikamApp
QFSFileEngine::open: No file name specified
digikam.general: Using  8  CPU core to run threads
digikam.general: new search text settings: "" : hasResult = false , 
validRows = 0
QFSFileEngine::open: No file name specified
digikam.geoiface: ----
digikam.general: Added root album called:  "album"
digikam.general: Using  8  CPU core to run threads
digikam.general: Action Thread run  1  new jobs
digikam.geoiface: "ROADMAP"
digikam.geoiface: ----
digikam.general: Stacked View Mode :  0
digikam.geoiface: "ROADMAP"
digikam.geoiface: "ROADMAP"
digikam.geoiface: ----
digikam.geoiface: ----
digikam.general: Using  8  CPU core to run threads
digikam.general: Action Thread run  1  new jobs
digikam.geoiface: "ROADMAP"
digikam.geoiface: ----
digikam.geoiface: ----
digikam.general: One job is done
digikam.general: Cancel Main Thread
digikam.general: One job is done
digikam.geoiface: "setting backend marble"
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
digikam.geoiface: "ROADMAP"
digikam.geoiface: "setting backend marble"
digikam.facesengine: Face database ready for use
digikam.general: Face PipeLine: add database writer
digikam.general: Face PipeLine: add faces trainer
digikam.facesengine: Face database ready for use
digikam.general: Face PipeLine: add database writer
digikam.general: Face PipeLine: add faces trainer
digikam.geoiface: "setting backend marble"
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
digikam.geoiface: "ROADMAP"
digikam.geoiface: "ROADMAP"
digikam.general: Cancel Main Thread
digikam.general: Cancel Main Thread
digikam.general: scan mode: ScanDeferredFiles
digikam.general: total scan value :  1245
digikam.database: items to tag ()
digikam.database: Complete scan took: 34 msecs.
digikam.general: Event is dispatched to KDE desktop notifier
digikam.general: Try to get preview from 
"/pub/multimedia/album/wissant/p5100273.jpg"
digikam.general: Preview quality:  0
digikam.general: Try to load DImg preview from: 
"/pub/multimedia/album/wissant/p5100273.jpg"
digikam.dimg: "/pub/multimedia/album/wissant/p5100273.jpg" : Unknown 
image format !!!
digikam.general: Cannot extract preview for 
"/pub/multimedia/album/wissant/p5100273.jpg"
digikam.general: Stacked View Mode :  1
digikam.general: Stacked View Mode :  1
digikam.general: Testing  "mysql_install_db" ...
digikam.general: Found  "mysql_install_db"
digikam.general: Testing  "mysqld" ...
digikam.general: Testing  "mysqld" ...
digikam.general: Testing  "/usr/bin/mysqld" ...
digikam.general: All Binaries Found :  false
digikam.general: Testing  "/usr/sbin/mysqld" ...
digikam.general: Found  "/usr/sbin/mysqld"
digikam.general: All Binaries Found :  true
digikam.dimg: "/usr/share/digikam/data/sample-aix.png" : Unknown image 
format !!!
QPainter::begin: Paint device returned engine == 0, type: 2
QPainter::begin: Paint device returned engine == 0, type: 2
QPainter::begin: Paint device returned engine == 0, type: 2
QPainter::begin: Paint device returned engine == 0, type: 2
digikam.general: new search text settings: "" : hasResult = true , 
validRows = 9