Using Python and wxPython to Display A Motion JPEG From the TRENDnet Wireless Internet Camera

import httplib
import base64
import StringIO
import threading
import time
import wx

class Trendnet():
  
  def __init__(self, ip='1.1.1.1', username='admin', password='admin'):
    self.IP = ip
    self.Username = username
    self.Password = password
    self.Connected = False

  def Connect(self):
    if self.Connected == False:
      try:
        print 'Atempting to connect to camera', self.IP, self.Username, self.Password
        h = httplib.HTTP(self.IP)
        h.putrequest('GET','/cgi/mjpg/mjpeg.cgi')
        h.putheader('Authorization', 'Basic %s' % base64.encodestring('%s:%s' % (self.Username, self.Password))[:-1])
        h.endheaders()
        errcode, errmsg, headers = h.getreply()
        self.File = h.getfile()
        print 'Connected!'
        self.Connected = True
      except:
        print 'Unable to connect!'
        self.Connected = False
      
  def Disconnect(self):
    self.Connected = False
    print 'Camera Disconnected!'

  def Update(self):
    if self.Connected: 
      s = self.File.readline()    # '--myboundry'
      s = self.File.readline()    # 'Content-Length: #####'
      framesize = int(s[16:])
      s = self.File.read(framesize)  # jpeg data
      while s[0] != chr(0xff):
        s = s[1:]
      return StringIO.StringIO(s)
      
class CameraPanel(wx.Panel):
  
  def __init__(self, parent, camera):
    wx.Panel.__init__(self, parent, id=wx.ID_ANY, style=wx.SIMPLE_BORDER)
    self.Camera = camera
    self.Bind(wx.EVT_PAINT, self.OnPaint)
    self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
  
  def OnEraseBackground(self, event):
    pass
  
  def OnPaint(self, event):
    dc = wx.BufferedPaintDC(self)
    
    if self.Camera.Connected == True:
      try:
        stream = self.Camera.Update()
        if stream != None:
          img = wx.ImageFromStream(stream)
          bmp = wx.BitmapFromImage(img)
          dc.DrawBitmap(bmp, 0, 0, True)
      except:
        pass
    else:
      dc.SetBrush(wx.WHITE_BRUSH)
      dc.DrawRectangle(-1, -1, 620, 480)
      
    dc.DrawCircle(340, 270, 5)
    dc.DrawCircle(280, 270, 5)

if __name__ == '__main__':

  def CamThread():
    while True:
      campanel.Refresh()
      time.sleep(.01)
      
  app = wx.App(0)
  
  wx.Log_SetActiveTarget(wx.LogStderr())
  
  frame = wx.Frame(parent=None, id=wx.ID_ANY, title='UpCam.py', style=wx.DEFAULT_FRAME_STYLE & ~wx.RESIZE_BORDER)
  camera = Trendnet('192.168.1.102')
  camera.Connect()
  campanel = CameraPanel(frame, camera)
  campanel.SetSize((620,480))
  
  sizer = wx.BoxSizer(wx.VERTICAL)
  sizer.Add(campanel, 1, wx.EXPAND|wx.ALL, 5)
  frame.SetSizer(sizer)
  frame.Fit()
  frame.Show(True)
  
  thread = threading.Thread(target=CamThread)
  thread.start()
  
  app.MainLoop()