[Digikam-devel] [digikam] [Bug 318577] Batch queue fails to process multiple RAW files simultaneously (in parallel)

[Gilles Caulier]

https://bugs.kde.org/show_bug.cgi?id=318577

--- Comment #3 from Gilles Caulier <caulier.gilles at gmail.com> ---
Since 3.0.0, kipi RAW converter processed files in parallel. You can try it
from Gwenview  for ex. Tool is just disabled in digiKam. It use the same
background process than BQM to paralelize operations, but implementation is
more complex of course due of capability to chain tools in a workflow.

You don't need to turn your computer to single cpu through linux kernel option.
In BQM, it's possible to turn off paralelization by patch source code like this
:

//-----------------------------------------------------------------------------------------------------------------
diff --git a/utilities/queuemanager/manager/actionthread.cpp
b/utilities/queuemanager/manager/actionthread.cpp
index 7a0a004..5f33727 100644
--- a/utilities/queuemanager/manager/actionthread.cpp
+++ b/utilities/queuemanager/manager/actionthread.cpp
@@ -55,6 +55,8 @@ public:
 ActionThread::ActionThread(QObject* const parent)
     : RActionThreadBase(parent), d(new Private)
 {
+    setMaximumNumberOfThreads(1);
+
     qRegisterMetaType<ActionData>();

     connect(this, SIGNAL(finished()),
//-----------------------------------------------------------------------------------------------------------------

Please try it just to confirm the problem with paralelization.

Q : why i cannot reproduce this problem on my computer. I use Sony Alpha camera
in RAW and as you, i play with processed images in PNG...

Gilles Caulier

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