from pandac.PandaModules import WebcamVideo
print "Choose a webcam"
for o in range(WebcamVideo.getNumOptions()):
option = WebcamVideo.getOption(o)
print "Option %d, '%s' at %f fps with size %dx%d" % (o, option.getName(), option.getFps(), option.getXSize(), option.getYSize())
o = int(raw_input("option>"))
option = WebcamVideo.getOption(o)
cursor = option.open()
WebcamVideo.getNumOptions() always returns 0. The webcam is functioning correctly and shows up under “Scanners and Cameras” in the Windows XP configuration panel. I’m using a “Quickcam for Notebooks Deluxe” camera.
opencv was accidently not included in the 1.5.4 build.
webcamVideo seems to be only semi-finished work.
right now i’m trying to get opencv working myself. there seems to be a few more strange things going on. investigations are ongoing.
Not quite there yet …
It shows me all the available webcams, I can pick one and I can use it as a texture. But all I see is a white square.
This is the code I use:
import direct.directbase.DirectStart
from pandac.PandaModules import WebcamVideo
from pandac.PandaModules import PandaSystem
from pandac.PandaModules import Texture
from pandac.PandaModules import CardMaker
print str(PandaSystem.getVersionString())
print "Choose a webcam"
for o in range(WebcamVideo.getNumOptions()):
option = WebcamVideo.getOption(o)
print "Option %d, '%s' at %f fps" % (o, option.getName(), option.getFps())
o = int(raw_input("option>"))
option = WebcamVideo.getOption(o)
cursor = option.open()
tex = Texture('movie')
cursor.setupTexture(tex)
cm = CardMaker('card')
card = aspect2d.attachNewNode(cm.generate())
card.setTexture(tex)
run()
This is the output:
1.5.2
Choose a webcam
Added device: DirectShow: QuickCam for Notebooks Deluxe @ 320 x 240 FPS:15
Added device: DirectShow: QuickCam for Notebooks Deluxe @ 176 x 144 FPS:30
Added device: DirectShow: QuickCam for Notebooks Deluxe @ 160 x 120 FPS:30
Added device: DirectShow: QuickCam for Notebooks Deluxe @ 352 x 288 FPS:15
Added device: DirectShow: QuickCam for Notebooks Deluxe @ 640 x 480 FPS:15
Option 0, 'DirectShow: QuickCam for Notebooks Deluxe @ 320 x 240 FPS:15' at 15.000000 fps with size
Option 1, 'DirectShow: QuickCam for Notebooks Deluxe @ 176 x 144 FPS:30' at 30.000000 fps with size
Option 2, 'DirectShow: QuickCam for Notebooks Deluxe @ 160 x 120 FPS:30' at 30.000000 fps with size
Option 3, 'DirectShow: QuickCam for Notebooks Deluxe @ 352 x 288 FPS:15' at 15.000000 fps with size
Option 4, 'DirectShow: QuickCam for Notebooks Deluxe @ 640 x 480 FPS:15' at 15.000000 fps with size
option>4
IID_IGraphBuilder & IID_ICaptureGraphBuilder2 are established.
IID_IMediaControl interface is acquired.
The capture filter is acquired.
The capture filter has been added to the graph.
IID_IBaseFilter of CLSID_SampleGrabber is acquired.
The media type of the sample grabber is set 24-bit RGB.
The sample grabber has been added to the graph.
IID_IBaseFilter of CLSID_NullRenderer is acquired.
The Null Renderer has been added to the graph.
Connected media type 640 x 480
:util(warning): Adjusting global clock's real time by -2.6743 seconds.
your code works fine for me. so… the problem is somewhere else.thought i dont know where.
i’m runnin 1.6.0 on linux here on a dell laptop +integrated webcam.
i’ve tried to get opencv to run under windows as well, without luck. i get the same error as you do, the camera is opened but with a image size of 0/0.
but i could get it to run under windows using this:
import sys
from pandac.PandaModules import *
from direct.directbase import DirectStart
if sys.platform == 'win32':
# manually select the video mode
if False:
print str(PandaSystem.getVersionString())
print "Choose a webcam"
for o in range(WebcamVideo.getNumOptions()):
option = WebcamVideo.getOption(o)
print "Option %d, '%s' at %f fps" % (o, option.getName(), option.getFps())
# ask the user which camera to use
o = int(raw_input("option>"))
option = WebcamVideo.getOption(o)
else:
# just use the option 0
option = WebcamVideo.getOption(0)
cursor = option.open()
videoTexture = Texture('movie')
cursor.setupTexture(videoTexture)
# calculate the same as openCVTexture has as function
videoTextureScale = Vec2(option.getSizeX()/float(videoTexture.getXSize()), option.getSizeY()/float(videoTexture.getYSize()))
# under windows the webcam must be updated manually
def updateVideo(task):
if cursor.ready():
cursor.fetchIntoTexture(0, videoTexture, 0)
return task.cont
taskMgr.add(updateVideo, 'updateVideo')
elif sys.platform == 'linux2':
# fallback in case something goes wrong (openCVTexture doesnt work under windows yet)
videoTextureScale = (1,1)
# use the tex-coordinates so the video fills the whole card
videoTexture = OpenCVTexture()
print "camera open", videoTexture.fromCamera()
print "camera video resolution", videoTexture.getVideoWidth(), videoTexture.getVideoHeight()
# get the texture scale
videoTextureScale = videoTexture.getTexScale()
if not videoTexture.getVideoWidth() or not videoTexture.getVideoHeight():
print "invalid camera texture size", videoTexture.getVideoWidth(), videoTexture.getVideoHeight()
sys.exit()
# save the opencv video into a image
#pnmImage0 = PNMImage()
#openCVTexture.store(pnmImage0)
# generate a card to show the texture on
cardMaker = CardMaker('cardMaker')
# define the card size
#cardMaker.setFrame(-videoTextureScale[1]/2.,videoTextureScale[1]/2.,-videoTextureScale[0]/2.,videoTextureScale[0]/2.)
cardMaker.setFrame(-videoTextureScale[1],videoTextureScale[1],-videoTextureScale[0],videoTextureScale[0])
# set the uv coordinates of the card, y-scale must be reversed
cardMaker.setUvRange(Point2(videoTextureScale[0],0), Point2(0,videoTextureScale[1]))
# create a card and attach to render
card = render.attachNewNode(cardMaker.generate())
card.setTexture(videoTexture)
card.setTwoSided(True)
# rotate it
card.hprInterval(10,Point3(360,0,0)).loop()
base.disableMouse()
base.camera.setPos(0,-3,0)
run()
windows and linux is handled differently, maybe osx runs the same as linux but i dont know. unfortunately the camera output is much worse under windows for me.
I’m trying to get the above code working, but all I get is a white spinning card – no webcam video. If I add print statements to the updateVideo task then I see that cursor.ready() never returns True.
Here’s the output:
DirectStart: Starting the game.
Known pipe types:
wglGraphicsPipe
(all display modules loaded.)
Added device: DirectShow: USB Video Device @ 320 x 240 FPS:15
Added device: DirectShow: USB Video Device @ 160 x 120 FPS:30
Added device: DirectShow: USB Video Device @ 176 x 144 FPS:30
Added device: DirectShow: USB Video Device @ 352 x 288 FPS:15
Added device: DirectShow: USB Video Device @ 640 x 480 FPS:15
IID_IGraphBuilder & IID_ICaptureGraphBuilder2 are established.
IID_IMediaControl interface is acquired.
The capture filter is acquired.
The capture filter has been added to the graph.
IID_IBaseFilter of CLSID_SampleGrabber is acquired.
The media type of the sample grabber is set 24-bit RGB.
The sample grabber has been added to the graph.
IID_IBaseFilter of CLSID_NullRenderer is acquired.
The Null Renderer has been added to the graph.
Connected media type 320 x 240
I’ve tried getting the above code to work on Ubuntu 9.10 64bit.
The software runs, and I can see opencv style output about my camera:
camera open 1
camera video resolution 320 240
Corrupt JPEG data: 27 extraneous bytes before marker 0xd9
Corrupt JPEG data: premature end of data segment
Corrupt JPEG data: 9 extraneous bytes before marker 0xd9
Corrupt JPEG data: 23 extraneous bytes before marker 0xd9
Corrupt JPEG data: premature end of data segment
Corrupt JPEG data: 53 extraneous bytes before marker 0xd9
but I get nothing but a white texture. I have other python examples working on this machine using the cctypes-opencv wrapper. So I don’t think the error is opencv…
If I try to use WebcamVideo I get:
DirectStart: Starting the game.
Known pipe types:
glxGraphicsPipe
(all display modules loaded.)
Assertion failed: (n >= 0) && (n < (int)_all_webcams.size()) at line 86 of panda/src/vision/webcamVideo.cxx
Traceback (most recent call last):
File "WebCamChooserBig.py", line 20, in <module>
option = WebcamVideo.getOption(0)
AssertionError: (n >= 0) && (n < (int)_all_webcams.size()) at line 86 of panda/src/vision/webcamVideo.cxx
afaik webcamvideo is a stub on linux. means it’s not implemented at all. and the white texture on webcam video bug is already known and beeing investigated.
