我刚刚安装OpenCV 2.4.7了OpenNIprimesense Sensor，如下面的构建信息所示。
我在抓取VideoCapture物体时遇到问题。例如，如果我运行 openni_capture 示例，我会得到“无法抓取图像”。但我得到了有关深度和 RGB 相机的信息，所以我认为我VideoCapture正确打开了对象，但是当它尝试抓取图像时，抓取函数返回 0。
我使用的是 Asus Xtion Pro Live，OpenNI 和 Sensor 工作正常，因为我能够运行 NiViewer 等示例。
我会很感激这个问题的一些帮助。
谢谢！
General configuration for OpenCV 2.4.7 =====================================
Version control: unknown
Platform:
Host: Linux 3.5.0-47-generic x86_64
CMake: 2.8.9
CMake generator: Unix Makefiles
CMake build tool: /usr/bin/make
Configuration: Release
C/C++:
Built as dynamic libs?: YES
C++ Compiler: /usr/bin/c++ (ver 4.7.2)
C++ flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG -DNDEBUG
C++ flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g -O0 -DDEBUG -D_DEBUG -ggdb3
C Compiler: /usr/bin/gcc
C flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG -DNDEBUG
C flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g -O0 -DDEBUG -D_DEBUG -ggdb3
Linker flags (Release):
Linker flags (Debug):
Precompiled headers: YES
OpenCV modules:
To be built: core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu ocl nonfree contrib java python stitching superres ts videostab
Disabled: world
Disabled by dependency: -
Unavailable: androidcamera
GUI:
QT: NO
GTK+ 2.x: YES (ver 2.24.13)
GThread : YES (ver 2.34.1)
GtkGlExt: NO
OpenGL support: NO
Media I/O:
ZLib: /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.7)
JPEG: libjpeg (ver 62)
PNG: /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.2.49)
TIFF: /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 - 4.0.2)
JPEG 2000: /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)
OpenEXR: build (ver 1.7.1)
Video I/O:
DC1394 1.x: NO
DC1394 2.x: YES (ver 2.2.0)
FFMPEG: YES
codec: YES (ver 53.35.0)
format: YES (ver 53.21.1)
util: YES (ver 51.22.2)
swscale: YES (ver 2.1.0)
gentoo-style: YES
GStreamer:
base: YES (ver 0.10.36)
app: YES (ver 0.10.36)
video: YES (ver 0.10.36)
OpenNI: YES (ver 1.5.7, build 10)
OpenNI PrimeSensor Modules: YES (/usr/lib/libXnCore.so)
PvAPI: NO
GigEVisionSDK: NO
UniCap: NO
UniCap ucil: NO
V4L/V4L2: Using libv4l (ver 0.8.8)
XIMEA: NO
Xine: NO
Other third-party libraries:
Use IPP: NO
Use Eigen: YES (ver 3.0.93)
Use TBB: NO
Use OpenMP: NO
Use GCD NO
Use Concurrency NO
Use C=: NO
Use Cuda: NO
Use OpenCL: YES
OpenCL:
Version: dynamic
Include path: /home/xxx/imageproc/opencv-2.4.7/3rdparty/include/opencl/1.2
Use AMD FFT: NO
Use AMD BLAS: NO
Python:
Interpreter: /usr/bin/python2 (ver 2.7.3)
Libraries: /usr/lib/libpython2.7.so (ver 2.7.3)
numpy: /usr/lib/python2.7/dist-packages/numpy/core/include (ver 1.6.2)
packages path: lib/python2.7/dist-packages
Java:
ant: /usr/bin/ant (ver 1.8.2)
JNI: /usr/lib/jvm/java-6-openjdk/include /usr/lib/jvm/java-6-openjdk/include /usr/lib/jvm/java-6-openjdk/include
Java tests: YES
Documentation:
Build Documentation: NO
Sphinx: NO
PdfLaTeX compiler: /usr/bin/pdflatex
Tests and samples:
Tests: YES
Performance tests: YES
C/C++ Examples: YES
Install path: /usr/local
cvconfig.h is in: /home/xxx/imageproc/opencv-2.4.7/release
我实例化 videocapture 并尝试按如下方式抓取图像：
VideoCapture capture;
capture.open(CV_CAP_OPENNI);
if ( !capture.isOpened() )
{
cout << "Error opening capture" << endl;
return -1;
}
if( !capture.grab() )
{
cout << "Can not grab image" << endl;
}