Searching for Qt Jpeg Support information? Find all needed info by using official links provided below.
https://doc.qt.io/qt-5/qtimageformats-index.html
The core Qt Gui library by default supports reading and writing image files of the most common file formats: PNG, JPEG, BMP, GIF and a few more, ref. Reading and Writing Image Files.The Qt Image Formats add-on module provides optional support for other image file formats.
https://forum.qt.io/topic/17143/solved-jpeg-support-in-qt-4-8-1-qtcreator-2-4-1-linux-64bit
I would prefer not to have to recompile my Qt as most Qt JPEG support Google hits seem to suggest; and I most certainly did not have to do so with an earlier SDK. Wonder if it would be time to downgrade. Oh and I'm running Ubuntu 12.04 with libjpeg8 / ia32-libs installed. M;
https://stackoverflow.com/questions/885906/enabling-jpeg-support-for-qimage-in-py2exe-compiled-python-scripts
I've discovered that JPEG image support for QImage, along with other image formats, is provided by some DLLs in the \qt\plugins\imageformats directory (they're called qjpeg4.dll and qjpeg4d.dll). I think I need to use them somehow in my executable, but I don't know how. I've tried simply copying them to my exe directory, no luck.
https://doc.qt.io/archives/qt-4.8/qimagereader.html
For image formats that do not support setting the quality, this value is ignored. The value range of quality depends on the image format. For example, the "jpeg" format supports a quality range from 0 (low quality, high compression) to 100 (high quality, low compression). This …
https://stackoverflow.com/questions/42635505/how-to-fix-missing-jpeg-support-in-qt-4-8-under-linux-kde4
[UPDATE] Upgrading to python 2.7.6 and Qt 4.8.7 appears to make this problem go away and JPEG support is provided. Whereas before creating a QPixmap object using a path to a .jpeg/.jpg file would produce an object for which isNull() was always True, now I get a valid QPixmap object.
https://github.com/sofa-framework/sofa/issues/51
Nov 04, 2016 · Reading a JPEG file is implemented by ImageQt, which obviously depends on Qt. It means that Qt is needed to load any JPEG image (actually, also gif, and other exotic formats). I think we should be able to read JPEG files without Qt ; per...
https://jingfenghanmax.blogspot.com/2010/06/build-qt-with-support-of-png-jpeg-tiff.html
Strongly recommanded to build Qt with his own library of png, jpeg, tiff by./configure -qt-libtiff -qt-libpng -qt-libjpeg Actually, these options are not default (marked with +).
https://sourceforge.net/p/dclib/discussion/442518/thread/93deb3e9/
May 13, 2017 · add "DLIB_JPEG_SUPPORT" to C/C++ -> preprocessor-> preprocessor definitions 4. compile and run the program. it works! icedecker - 2014-06-13 Now it worked, thanks for the quick reply! I need to read better the documentation, but would be nice if each section of a group of functions specify the needed libs to link. ...
https://github.com/ContinuumIO/anaconda-issues/issues/131
Jun 16, 2014 · It's not a problem for me anymore. I ported my code to Qt5 (it just required 2 days of work, that's not much). Now jpeg images load properly, but I have other issues with freezing my app (but it's another story). If you don't support pyqt4 anymore, shouldn't we close the issue as "won't fix" ?
https://bugreports.qt.io/browse/QTBUG-37946
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