[PyQt] Conversion problem from QImage to QPixmap

Nicola Creati ncreati at inogs.it
Fri Aug 27 15:21:10 BST 2010

I'm having troubles trying to convert from a QImage to a QPixmap. The 
resulting QPixmap is always invalid (isNull method is always True). This 
is a short code that reproduce my problem:

from PyQt4.QtGui import *
from PyQt4.QtCore import *
import sys

app = QApplication(sys.argv)

img = QImage("image.jpeg")

pix = QPixmap()
pix.save("output.jpeg", 'JPEG')

l = QLabel()


The Qlabel shows nothing and no image file is saved from the QPixmap 
object pix. I have tried with several different image file but I got 
always the same result.

Please, can someone help?


Nicola Creati
Istituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGS www.inogs.it Dipartimento di Geofisica della Litosfera Geophysics of Lithosphere Department CARS (Cartography and Remote Sensing) Research Group http://www.inogs.it/Cars/ Borgo Grotta Gigante 42/c 34010 Sgonico - Trieste - ITALY ncreati at ogs.trieste.it
off.   +39 040 2140 213
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