<p>我正在使用新的PySDL2包,试图将其与我现有的OpenCV代码进行接口。我想通过cv2python接口到OpenCV从网络摄像头捕捉到的图像,并使用PySDL2在屏幕上的窗口中显示它。我想我已经知道如何正确地将cv2图像格式转换为PySDL2曲面,但在下面代码的末尾,我得到的只是一个黑色窗口。任何关于我哪里出错的建议都将不胜感激!在</p>
<pre><code>#grab a frame from a webcam
import cv2
vc = cv2.VideoCapture(0)
junk,image = vc.read()
#convert image to sdl format (?)
import sdl2
sbuf = image.tostring()
simage = sdl2.SDL_CreateRGBSurfaceFrom(sbuf,image.shape[0],image.shape[1],24,3*image.shape[0],sdl2.SDL_PIXELFORMAT_BGRA8888,0xff0000, 0x00ff00, 0x0000ff, 0)
#create a window
sdl2.SDL_Init(sdl2.SDL_INIT_VIDEO)
windowSize = (640,480)
window = sdl2.SDL_CreateWindow(b"Hello World",sdl2.SDL_WINDOWPOS_CENTERED, sdl2.SDL_WINDOWPOS_CENTERED,windowSize[0], windowSize[1], sdl2.SDL_WINDOW_SHOWN)
windowSurface = sdl2.SDL_GetWindowSurface(window)
#try to blit the sdl-formatted image to the window
sdl2.SDL_BlitSurface(simage,None,windowSurface,None)
sdl2.SDL_UpdateWindowSurface(window)
sdl2.SDL_FreeSurface(simage)
# pump events to get the window to show and update
while True:
sdl2.SDL_PumpEvents()
</code></pre>