@LL-L hi,

Are you using the default backend ?

Hi
https://doc.qt.io/qt-5/qtimageformats-index.html

The core Qt Gui library contains the code for JPEG so recompile is needed to get rid of it.

However, are you sure its a clash ? I mean the JPEG is wrapped into Qt and classes so
clashing with a free function seems unlikely.

Why create a QList and not do the conversion directly after calling CaptureImage ?

Otherwise, does the library you are using to get the image provide a streaming API ?

@SGaist
Hi! yes I have checked this before but I dropped it, I got many errors because I don't know how to link the libraries in the command prompt

'nmake -f makefile.vc TARGET=rel'

And the link does not contain Qt5 . When I downloaded the latest release of poppler, it didn't come with makefile.vc file. So I decided to go with CMake GUI.

I'm not comfortable with makefiles, I prefer to use CMake GUI (easy to include lib & dir) since I already built zlib, freetype and libjpeg libraries in vs2013 win64

Regards,

app = QApplication(sys.argv) # in case qt can`t find image fomat plugins for jpeg app.addLibraryPath(os.path.join(os.environ['QT5DIR'], "plugins"))