Hello there,
I’m trying to do something simple in concept:
- capture a live input video feed from a BlackMagic Intensity capture card, and set it as a texture
- apply this texture to a model
I can “sort of” get this to work. Here’s the dilemma…
My goal capture resolution/framerate (for now) is 1280x720 @ 60Hz. If I open up GraphStudio and pipe the Blackmagic Capture to a Renderer, it renders just fine at 60Hz (see http://i53.tinypic.com/15ejl2p.png).
If I try to capture to a 2D card in Panda3D at 60Hz, I get nothing but black. If I change the setting down to 50Hz, I get a gray, warped, distorted, partial image (see http://i51.tinypic.com/8xo83l.png).
And (just for grins) if I try to set GraphStudio to 50Hz, I get nothing but black.
Here is the code I’m using (fyi, I’m using WebcamVideo option 3 because it’s the one that shows up at 1280x720)…
import sys
from pandac.PandaModules import *
from direct.directbase import DirectStart
# manually select the video mode
option = WebcamVideo.getOption(3)
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')
# 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() And here is the output that I get (seems fine, right?)…
DirectStart: Starting the game.
Known pipe types:
wglGraphicsPipe
(all display modules loaded.)
Added device: DirectShow: 01DD3BFC:2
Added device: DirectShow: 01DD3C84:2
Added device: DirectShow: 01DD3D24:2
Added device: DirectShow: 01DD3DAC:2
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 1280 x 720Any thoughts?