python opencv：没有图像
我正在尝试从 Sony Handicam DCR-HC38 进行捕获，运行下面的代码，并将 [-1 .. 3] 传递给 CaptureFromCAM 函数。代码运行，但我没有得到图像。我需要以某种方式“包裹”相机吗？ Skype 可以识别摄像头，但 python/opencv 不会。我正在运行 Windows Vista（如果有帮助的话）。
import cv
cv.NamedWindow("camera", 1)
capture = cv.CaptureFromCAM(-1)
while True:
img = cv.QueryFrame(capture)
cv.ShowImage("camera", img)
if cv.WaitKey(10) == 27:
break
I am trying to capture from a Sony Handicam DCR-HC38, running the code below, and passing [-1 .. 3] to the CaptureFromCAM function. The code runs, but I get no image. Do I need to "wrap" the camera somehow? Skype recognizes the camera, but python/opencv won't. I'm running Windows Vista if that helps any.
import cv
cv.NamedWindow("camera", 1)
capture = cv.CaptureFromCAM(-1)
while True:
img = cv.QueryFrame(capture)
cv.ShowImage("camera", img)
if cv.WaitKey(10) == 27:
break
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尝试增加 cv.WaitKey 的延迟
try increasing the delay on the cv.WaitKey
不确定你是否修复了它。但我想出的解决方案是检查 OpenCv 正在尝试访问哪个驱动程序...我有 v4l1 和 v4l2，但是我只能通过使用 gstreamer 编解码器和我的 lenovo x200 上的 v4l2 驱动程序来访问设备 /dev/video0 （内部）网络摄像头）使用 ubuntu 10.10。所以我必须从源代码重新编译Opencv，首先应用在以下位置找到的补丁：
Opencv-2.0.0.link.v4l2.patch
将补丁解压到 opencv 根目录：然后打开终端并 cd 到 opencv 根目录，然后执行以下操作：
然后：
现在您的 opencv 库应该访问 v4l2 驱动程序，希望这对某人有帮助
not sure if you fixed it or not. But the solution I figured out is by checking which driver OpenCv is trying to access... I have both v4l1 and v4l2, however I can only access device /dev/video0 by using gstreamer codec and the v4l2 driver on my lenovo x200 (internal webcam) using ubuntu 10.10. So I had to recompile Opencv from source, by firstly applying the patch found at:
Opencv-2.0.0.link.v4l2.patch
extract the patch to your opencv root directory: then open terminal and cd to the opencv root directory, and do the following:
then:
Now your opencv libraries should access the v4l2 driver instead, hope this helps someone