[cgkit-user] cgkit.mediafile with PyQt4 and Python3

[Timothy W. G. <tim...@si...>]

Anyone with successful experience of using cgkit.mediafile with PyQt4 
and Python3 ?

Since I'm working with Python 3 the use of PIL Images isn't available to 
me (or is it?), so
I'm attempting to paint a video frame to a QImage instead. Below is an 
attempt to do so
with the first frame from a sample video found in Windows 7, but no joy 
yet. Any ideas
are most welcome.

Best regards,
Tim Grove


import sys

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

from cgkit import mediafile
import numpy as np

if __name__ == '__main__':
     app = QApplication(sys.argv)

     ## setup widgets to display video frames
     widget = QWidget(None)
     widget.resize(QSize(400, 300))
     videoLabel = QLabel(widget)
     videoLabel.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
     videoLabel.setPixmap(QPixmap(QSize(400, 300)))
     layout = QVBoxLayout()
     layout.addWidget(videoLabel)
     widget.setLayout(layout)
     widget.show()

     fileName = "C:\\Users\\Public\\Videos\\Sample Videos\\Wildlife.wmv"
     vid = mediafile.open(fileName) # open file
     frame = next(vid.iterData()) # get data for first frame
     # Get the current video frame as a numpy.ndarray.
     ndArray = frame.numpyArray()
     w = ndArray.shape[0]
     h = ndArray.shape[1]

     # paint data into a QImage
     img = QImage(w, h, QImage.Format_RGB32)
     img.ndarray = ndArray # keep ndArray for image; NOTE: necessary???

     # convert ndArray into a QByteArray NOTE: is this correct ???
     byteArray = QByteArray(ndArray.data.tobytes())
     img.fromData(byteArray)

     # convert QImage to a QPixmap and paint it into the video QLabel
     videoLabel.pixmap().convertFromImage(img)
     ## NOTE: NOTHING HAPPENS !!!

     vid.close() #close file

     sys.exit(app.exec_())