Hi all. I'm trying to capture video from a webcam and then display the feed in a wxPython GUI. I originally borrowed code from the OpenCV wiki (http://opencv.willowgarage.com/wiki/wxpython), and since the code was for OpenCV 1.x I tried to adapt it for version 2.1. Here's my attempt to far:
import wx
import sys
import cv
sys.path.append('C:\OpenCV2.1\Python2.6\Lib\site-packages')
class captureTest(wx.Frame):
TIMER_PLAY_ID = 101
def __init__(self, parent):
wx.Frame.__init__(self, parent, -1)
self.capture = cv.CaptureFromCAM(0)
capturedImage = cv.QueryFrame(self.capture)
self.SetSize((capturedImage.width, capturedImage.height))
self.displayPanel = wx.Panel(self, -1)
cv.CvtColor(capturedImage, capturedImageModified, cv.CV_BGR2RGB)
self.buildBmp = wx.BitmapFromBuffer(capturedImageModified.width, capturedImageModified.height, capturedImageModified.tostring())
self.Bind(wx.EVT_PAINT, self.onPaint)
self.playTimer = wx.Timer(self, self.TIMER_PLAY_ID)
wx.EVT_TIMER(self, self.TIMER_PLAY_ID, self.onNextFrame)
fps = gui.cvGetCaptureProperty(self.capture, gui.CV_CAP_PROP_FPS)
self.Show(True)
if fps!=0: self.playTimer.Start(1000/fps) #every X ms
else: self.playTimer.Start(1000/15) #assuming 15 fps
def onPaint(self, evt):
if self.buildBmp:
dc=wx.BufferedPaintDC(self.displayPanel, self.buildBmp)
evt.Skip()
def onNextFrame(self, evt):
capturedImage = cv.QueryFrame(self.capture)
if capturedImage:
cv.CvtColor(capturedImage, capturedImageModified, cv.CV_BGR2RGB)
self.buildBmp.CopyFromBuffer(capturedImageModified.tostring())
self.Refresh()
evt.Skip()
if __name__=="__main__":
app = wx.App()
app.RestoreStdio()
captureTest(None)
app.MainLoop()I'm having issues getting the GUI to launch. Either there's issues will null pointers or some other sort of error. I feel like I'm forgetting something trivial. Any ideas?