main.py

import sys
from PyQt4 import uic
from PyQt4 import QtCore, QtGui
from PyKDE4.phonon import *
from PyKDE4.kdecore import *
FaceDirPath = KGlobal.dirs().resourceDirs("data")[-1] + "kdm/pics/users/"
FacesDir = QtCore.QDir(FaceDirPath)
Faces = FacesDir.entryList(QtCore.QDir.Files)
app = QtGui.QApplication(sys.argv)
widgets = uic.loadUi('/tmp/webCam.ui')
for Face in Faces:
    QtGui.QListWidgetItem( QtGui.QIcon(FaceDirPath + Face) , Face.replace('.png', ''), widgets.m_FacesWidget)
vbox = widgets.verticalLayout
vp = Phonon.VideoPlayer()
media = Phonon.MediaSource(Phonon.BackendCapabilities.availableVideoCaptureDevices()[0])
vp.load(media)
vbox.addWidget(vp)
PushButton = QtGui.QPushButton("Take a picture!")
vbox.addWidget(PushButton)
vp.play()
widgets.show()
app.exec_()

webCam.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Form</class>
 <widget class="QWidget" name="Form">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>704</width>
    <height>477</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Form</string>
  </property>
  <widget class="QLabel" name="label">
   <property name="geometry">
    <rect>
     <x>10</x>
     <y>10</y>
     <width>691</width>
     <height>16</height>
    </rect>
   </property>
   <property name="text">
    <string>This picture will identify you in the account settings, login screen, and lock screen.</string>
   </property>
  </widget>
  <widget class="QWidget" name="horizontalLayoutWidget">
   <property name="geometry">
    <rect>
     <x>10</x>
     <y>40</y>
     <width>691</width>
     <height>351</height>
    </rect>
   </property>
   <layout class="QHBoxLayout" name="horizontalLayout">
    <item>
     <widget class="QWidget" name="widget" native="true">
      <widget class="QWidget" name="verticalLayoutWidget">
       <property name="geometry">
        <rect>
         <x>390</x>
         <y>20</y>
         <width>281</width>
         <height>311</height>
        </rect>
       </property>
       <layout class="QVBoxLayout" name="verticalLayout"/>
      </widget>
      <widget class="QListWidget" name="m_FacesWidget">
       <property name="geometry">
        <rect>
         <x>9</x>
         <y>16</y>
         <width>371</width>
         <height>321</height>
        </rect>
       </property>
       <property name="iconSize">
        <size>
         <width>64</width>
         <height>64</height>
        </size>
       </property>
       <property name="resizeMode">
        <enum>QListView::Adjust</enum>
       </property>
       <property name="viewMode">
        <enum>QListView::IconMode</enum>
       </property>
      </widget>
     </widget>
    </item>
   </layout>
  </widget>
 </widget>
 <resources/>
 <connections/>
</ui>