PyQt missing SVG, JPG, TIFF and other support in QImageReader #131

3five8 · 2014-06-16T13:39:38Z

The pyqt available through conda install pyqt only supports the following.

print QtGui.QImageReader.supportedImageFormats()
[PyQt4.QtCore.QByteArray('bmp'), PyQt4.QtCore.QByteArray('pbm'), PyQt4.QtCore.QByteArray('pgm'), PyQt4.QtCore.QByteArray('png'), PyQt4.QtCore.QByteArray('ppm'), PyQt4.QtCore.QByteArray('xbm'), PyQt4.QtCore.QByteArray('xpm')]

The Qt4 documentation list several more.

BMP Windows Bitmap
GIF Graphic Interchange Format (optional)
JPG Joint Photographic Experts Group
JPEG Joint Photographic Experts Group
MNG Multiple-image Network Graphics
PNG Portable Network Graphics
PBM Portable Bitmap
PGM Portable Graymap
PPM Portable Pixmap
TIFF Tagged Image File Format
XBM X11 Bitmap
XPM X11 Pixmap
SVG Scalable Vector Graphics
TGA Targa Image Format

Could this be due to missing configuration during compilation?

I am running conda 3.5.5 on Win32.

The text was updated successfully, but these errors were encountered:

zhangruoyu · 2014-06-20T04:17:44Z

Here is the solution:

http://stackoverflow.com/questions/14556841/how-to-load-ico-files-in-pyqt4-from-network

from PyQt4 import QtGui, QtCore
from os import path
QtCore.QCoreApplication.addLibraryPath(path.join(path.dirname(QtCore.__file__), "plugins"))
QtGui.QImageReader.supportedImageFormats()

Nodd · 2014-09-25T13:30:28Z

This solution doesn't work for me, be it on PySide or PyQt4 (and even if it did, it should not be necessary).

avalentino · 2014-11-23T20:24:01Z

Same problem here.
Maybe this issue can be fixed installing a proper qt.conf (see also #66 and #138).

ccordoba12 · 2015-04-10T19:59:16Z

@Nodd could you test if this is fixed in the latest packages provided by conda?

jepebe · 2016-06-27T14:24:25Z

On OSX the latest version of PyQt4 does not have JPEG/JPG.

ccordoba12 · 2016-06-27T18:55:53Z

The plugins location has changed. Now it is at

/<path-to-Anaconda-or-env>/lib/qt4/plugins

Please verify that it's working for you.

jepebe · 2016-06-28T04:14:18Z

These are the files in /anaconda/lib/qt4/plugins

libqgif.dylib
libqico.dylib
libqjpeg.dylib
libqmng.dylib
libqsvg.dylib
libqtga.dylib
libqtiff.dylib

While this is the output of print(QImageReader.supportedImageFormats())

[PyQt4.QtCore.QByteArray('bmp'), PyQt4.QtCore.QByteArray('gif'), PyQt4.QtCore.QByteArray('ico'), PyQt4.QtCore.QByteArray('mng'), PyQt4.QtCore.QByteArray('pbm'), PyQt4.QtCore.QByteArray('pgm'), PyQt4.QtCore.QByteArray('png'), PyQt4.QtCore.QByteArray('ppm'), PyQt4.QtCore.QByteArray('svg'), PyQt4.QtCore.QByteArray('svgz'), PyQt4.QtCore.QByteArray('tga'), PyQt4.QtCore.QByteArray('tif'), PyQt4.QtCore.QByteArray('tiff'), PyQt4.QtCore.QByteArray('xbm'), PyQt4.QtCore.QByteArray('xpm')]

jepebe · 2016-06-28T09:44:53Z

I also added these paths with the same result.

QCoreApplication.addLibraryPath("%s/anaconda/lib/qt4" % user_path)
QCoreApplication.addLibraryPath("%s/anaconda/lib/qt4/plugins" % user_path)
QCoreApplication.addLibraryPath("%s/anaconda/lib/qt4/plugins/imageformats" % user_path)

ccordoba12 · 2016-06-28T15:16:57Z

So the only unsupported one is Jpeg, but I don't know why as we provide the Qt plugin for it :-/

jepebe · 2016-07-04T07:38:39Z

Anything else I can do to debug this?

brylie · 2016-07-06T11:16:10Z

I am unable to render SVG images in Orange3 when Anaconda is installed. Here are my available image formats:

>>> print("PyQt4 installed in", os.path.dirname(PyQt4.__file__))
PyQt4 installed in /home/brylie/anaconda3/lib/python3.5/site-packages/PyQt4
>>> print("Qt4 library paths", QApplication.libraryPaths())
Qt4 library paths []
>>> print([bytes(f).decode("ascii") for f in QImageReader.supportedImageFormats()])
['bmp', 'pbm', 'pgm', 'png', 'ppm', 'xbm', 'xpm']

brylie · 2016-07-07T07:26:32Z

As a previous comment suggested, I looked under the anaconda3 folder in my home directory. I found the following:

~/anaconda3/lib/qt4/plugins/iconengines
- libqsvgicon.so
~/anaconda3/lib/qt4/plugins/imageformats
- libqgif.so
- libqjpeg.so
- libqsvg.so
- libqtiff.so
- libqico.so
- libqmng.so
- libqtga.so

I notice SVG in both locations, but SVG is not listed in QImageReader.supportedImageFormats():

>>> print([bytes(f).decode("ascii") for f in QImageReader.supportedImageFormats()])
['bmp', 'pbm', 'pgm', 'png', 'ppm', 'xbm', 'xpm']

astaric · 2016-07-07T08:00:22Z

I am experiencing the same problem with anaconda 4.1.6 on OSX (missing SVG support).

I can work around the issue by moving the qt.conf from anaconda/bin to anaconda/python.app/Contents/Resources.

brylie · 2016-07-07T08:21:15Z

Thanks @astaric. I don't have a python.app folder. My folder structure, on Ubuntu 16.04, looks like:

~/anaconda3
- bin/
- conda-meta
- envs/
- etc/
- Examples/
- include/
- lib/
- LICENSE.txt
- pkgs/
- share/
- ssl/
- var/

To which folder should I copy qt.conf?

ccordoba12 · 2016-07-07T17:22:47Z

@astaric, thanks a lot for the suggestion. I'll add it to our next build of Qt4 :-)

ccordoba12 · 2016-07-07T17:23:51Z

@brylie, you need to install python.app first:

conda install python.app

brylie · 2016-07-08T07:12:14Z

Thanks @ccordoba12. Here is the output of that command:

Error: Package missing in current linux-64 channels: 
  - python.app

Close matches found; did you mean one of these?

    python.app: python-snappy, python-ldap, python

You can search for packages on anaconda.org with

    anaconda search -t conda python.app

When searching for the python.app, three packages appear:

anaconda search -t conda python.app
Using Anaconda Cloud api site https://api.anaconda.org
Run 'anaconda show <USER/PACKAGE>' to get more details:
Packages:
     Name                      |  Version | Package Types   | Platforms      
     ------------------------- |   ------ | --------------- | ---------------
     aetrial/python.app        |          | conda           | osx-64         
     anaconda/python.app       |      1.2 | conda           | osx-64         
     asmeurer/python.app       |      1.2 | conda           | osx-64         
Found 3 packages

Note, I am on GNU/Linux. Is the python.app necessary?

ccordoba12 · 2016-07-08T20:41:54Z

python.app is only available for Mac.

JPFrancoia · 2016-11-16T18:16:47Z

Hi, I'm jumping into the issue.

On a fresh install of Mac OS X El capitan, fresh install of anaconda3 (conda 4.2.12), fresh install of pyqt4, I don't have the directory ~/anaconda3/lib/qt4/, just ~/anaconda3/lib/.

Also, I tried @astaric 's solution: I installed python.app, moved qt.conf from anaconda/bin to anaconda/python.app/Contents/Resources, but my program still can't load jpeg images.

What can I try ?

JPFrancoia · 2016-11-21T10:59:53Z

Should I open a new issue ?

@astaric , could you post the content of the qt.conf file you put in anaconda/python.app/Contents/Resources please ?

ccordoba12 · 2016-11-21T15:03:09Z

We're probably not going to update Qt4/PyQt4 anymore.

Is this problem still present in Qt5?

JPFrancoia · 2016-11-21T15:49:20Z

I don't know, but I can check if you want. For now, I have a huge software developed with PyQt4 and I don't intend to port it to qt5 anytime soon. Is there a way/tweak I can make PyQt4 work for now ?

First, is it normal I don't have the directories as the others ? I don't have the directory ~/anaconda3/lib/qt4/, for example.

ccordoba12 · 2016-11-21T16:05:39Z

I don't know, but I can check if you want.

I checked it, and our Qt5 packages support all these formats out of the box.

I don't intend to port it to qt5 anytime soon

You could use qtpy to quite easily do the porting job. That's a compatibility library to work seamlessly with PyQt4 and PyQt5 in the same codebase.

Is there a way/tweak I can make PyQt4 work for now ?

I don't think so, it seems to have this we'd need to recompile Qt4 and PyQt4. You have two alternatives here:

You could hire us to add these formats for Qt4.
You could experiment in the conda-forge qt feedstock to add these formats. Feedstocks are repos of conda packages that are built automatically in CI services. However, that feedstock only builds Linux packages.

dzimbeck · 2016-12-02T06:20:56Z

This is totally crazy 2016 and PyQt4 has problems with something as basic as a JPEG. We should be in flying cars by now, what is this.

I'm having the same issue. Deployed software and on some platforms the image dlls refuse to load with a frozen executable.

Had to use Pillow to convert the images manually to PNG. That works but not a great solution.

Can anyone confirm Qt5 works with JPEG?

JPFrancoia · 2016-12-02T09:06:21Z

Yes, Qt5 works with jpeg. However, Qt4 is not to blame here. I can work with it on linux and windows without problem.

mingwandroid · 2016-12-02T09:20:11Z

This is totally crazy 2016 and PyQt4 ..

Qt5 is 4 years old now. The amount of code change required to adapt Qt4 code to work on Qt5 is minimal: https://wiki.qt.io/Transition_from_Qt_4.x_to_Qt5. I expect PyQt and qtpy make the transition even easier. Please do your project(s) a favour and make those changes.

dzimbeck · 2016-12-02T13:29:23Z

Actually Qt4 is to blame. When you deploy the software as a frozen executable some systems will not correctly load the plugins. This is true for pyinstaller and others. It depends on the system. Deployed my applications work on 99% of the systems. But some users can't get jpegs because the plugin won't load. This is a known issue. Hooks don't work, even directly loading the plugin in the source code doesn't work. It simply will not load. I've spent two days on this bug. Had to convert every jpg to png.

JPFrancoia · 2016-12-02T14:01:31Z

Is it because the system doesn't properly loads the plugin, or because anaconda puts it in the wrong place ?

ccordoba12 · 2016-12-02T16:50:52Z

Is it because the system doesn't properly loads the plugin, or because anaconda puts it in the wrong place ?

This just happens because we (i.e. Continuum) don't provide those plugins, that's all.

To restate our position: Qt4 is not supported by us anymore. You're very welcome to hire us to add support for it in your projects if that's a priority for you.

If that alternative is not suitable, you have the option of sending a pull request against the qt conda-forge feedstock for all operating systems. Those recipes are the same ones we used internally, so we could pick your work and provide new packages for Qt4 on Continuum's side.

I hope our position is clear now.

JPFrancoia · 2016-12-02T21:59:21Z

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" ?

mingwandroid · 2016-12-05T11:08:33Z

Won't fix

asmeurer mentioned this issue Aug 14, 2014

Veusz build for Windows conda-archive/conda-recipes#161

Open

TWAC mentioned this issue Feb 26, 2015

Windows taskbar handling spyder-ide/spyder#2185

Closed

csoja assigned ccordoba12 Jun 27, 2016

brylie mentioned this issue Jul 6, 2016

Icons and buttons not visible after installing Orange 3.3.7 on Ubuntu 16.04 with Anaconda 3.x biolab/orange3#1418

Closed

astaric mentioned this issue Jul 8, 2016

update orange3 recipe ContinuumIO/anaconda-recipes#32

Merged

mingwandroid closed this as completed Dec 5, 2016

mingwandroid added the reso-wontfix label Dec 5, 2016

ccordoba12 removed their assignment Dec 5, 2016

syan1992 mentioned this issue Aug 27, 2017

Fix app.py for both PyQt4 & PyQt5 labelmeai/labelme#18

Merged

xinario mentioned this issue Nov 17, 2017

Not recognizing valid image files HumanSignal/labelImg#176

Closed

CFretter mentioned this issue Feb 24, 2018

Allow labels to be maintained between files in a directory HumanSignal/labelImg#244

Open

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

PyQt missing SVG, JPG, TIFF and other support in QImageReader #131

PyQt missing SVG, JPG, TIFF and other support in QImageReader #131

3five8 commented Jun 16, 2014

zhangruoyu commented Jun 20, 2014

Nodd commented Sep 25, 2014

avalentino commented Nov 23, 2014

ccordoba12 commented Apr 10, 2015

jepebe commented Jun 27, 2016 •

edited

ccordoba12 commented Jun 27, 2016

jepebe commented Jun 28, 2016

jepebe commented Jun 28, 2016

ccordoba12 commented Jun 28, 2016

jepebe commented Jul 4, 2016

brylie commented Jul 6, 2016

brylie commented Jul 7, 2016 •

edited

astaric commented Jul 7, 2016

brylie commented Jul 7, 2016 •

edited

ccordoba12 commented Jul 7, 2016 •

edited

ccordoba12 commented Jul 7, 2016

brylie commented Jul 8, 2016 •

edited

ccordoba12 commented Jul 8, 2016

JPFrancoia commented Nov 16, 2016

JPFrancoia commented Nov 21, 2016 •

edited

ccordoba12 commented Nov 21, 2016

JPFrancoia commented Nov 21, 2016 •

edited

ccordoba12 commented Nov 21, 2016

dzimbeck commented Dec 2, 2016

JPFrancoia commented Dec 2, 2016

mingwandroid commented Dec 2, 2016 •

edited

dzimbeck commented Dec 2, 2016 •

edited

JPFrancoia commented Dec 2, 2016

ccordoba12 commented Dec 2, 2016 •

edited

JPFrancoia commented Dec 2, 2016

mingwandroid commented Dec 5, 2016

PyQt missing SVG, JPG, TIFF and other support in QImageReader #131

PyQt missing SVG, JPG, TIFF and other support in QImageReader #131

Comments

3five8 commented Jun 16, 2014

zhangruoyu commented Jun 20, 2014

Nodd commented Sep 25, 2014

avalentino commented Nov 23, 2014

ccordoba12 commented Apr 10, 2015

jepebe commented Jun 27, 2016 • edited

ccordoba12 commented Jun 27, 2016

jepebe commented Jun 28, 2016

jepebe commented Jun 28, 2016

ccordoba12 commented Jun 28, 2016

jepebe commented Jul 4, 2016

brylie commented Jul 6, 2016

brylie commented Jul 7, 2016 • edited

astaric commented Jul 7, 2016

brylie commented Jul 7, 2016 • edited

ccordoba12 commented Jul 7, 2016 • edited

ccordoba12 commented Jul 7, 2016

brylie commented Jul 8, 2016 • edited

ccordoba12 commented Jul 8, 2016

JPFrancoia commented Nov 16, 2016

JPFrancoia commented Nov 21, 2016 • edited

ccordoba12 commented Nov 21, 2016

JPFrancoia commented Nov 21, 2016 • edited

ccordoba12 commented Nov 21, 2016

dzimbeck commented Dec 2, 2016

JPFrancoia commented Dec 2, 2016

mingwandroid commented Dec 2, 2016 • edited

dzimbeck commented Dec 2, 2016 • edited

JPFrancoia commented Dec 2, 2016

ccordoba12 commented Dec 2, 2016 • edited

JPFrancoia commented Dec 2, 2016

mingwandroid commented Dec 5, 2016

jepebe commented Jun 27, 2016 •

edited

brylie commented Jul 7, 2016 •

edited

brylie commented Jul 7, 2016 •

edited

ccordoba12 commented Jul 7, 2016 •

edited

brylie commented Jul 8, 2016 •

edited

JPFrancoia commented Nov 21, 2016 •

edited

JPFrancoia commented Nov 21, 2016 •

edited

mingwandroid commented Dec 2, 2016 •

edited

dzimbeck commented Dec 2, 2016 •

edited

ccordoba12 commented Dec 2, 2016 •

edited