How to ScreenShot multiple frames to numpy array

General Discussion
1

Hello,

I’ve been trying to capture multiple frames of one of my showbases called binocular_show. However right now I still get the same frame in my array everytime even though I’m trying to run a while loop and render the next frame. Any advice on how I get my pandas simulation frame by frame?

My code is below
class PandasExample():
def init(self):
super().init()

def image(self):
    print("hi")
    binocular_show.graphicsEngine.renderFrame()
    dr = binocular_show.camNode.getDisplayRegion(0)
    tex = dr.getScreenshot()
    data = tex.getRamImage()
    v = memoryview(data).tolist()
    img = np.array(v, dtype=np.uint8)
    img = img.reshape((tex.getYSize(), tex.getXSize(), 4))
    img = img[::-1]
    print(img)

if name == ‘main’:
app = QApplication(sys.argv)
panda = PandasExample()
while(True):
panda.image()
sys.exit(app.exec_())

Thanks!

2

Welcome to the forum!

If you wish to capture multiple frames, it would be better to use addRenderTexture on the window with copy-RAM mode instead of getScreenshot to automatically transfer the contents of the texture to CPU RAM after every frame.

3

Would this save the texture data and how could I convert it to a RAM image?

4

This has been done many times before, a quick Google search reveals these links:
https://alvissalim.com/2021/10/03/offscreen-rendering-using-panda3d/