Opencv无法访问我的网络摄像头 [英] Opencv cannot access my webcam
问题描述
我无法使用opencv 2.4.3访问网络摄像头.
I have trouble with accessing webcam using opencv 2.4.3.
我的系统:
Hp Probook 4530s-HP固定高清网络摄像头
Hp Probook 4530s - HP Fixed HD Webcam
Ubuntu 12.10
Ubuntu 12.10
OpenCV 2.4.3
OpenCV 2.4.3
İf我想捕获我的内置相机时出现错误:捕获为NULL
İf I want to capture my built-in camera i get ERROR: capture is NULL
我正在使用 http://opencv.willowgarage.com/wiki/CameraCapture 示例代码.
示例代码为:
#include "cv.h"
#include "highgui.h"
#include <stdio.h>
// A Simple Camera Capture Framework
int main() {
CvCapture* capture = cvCaptureFromCAM( CV_CAP_ANY );
if ( !capture ) {
fprintf( stderr, "ERROR: capture is NULL \n" );
getchar();
return -1;
}
// Create a window in which the captured images will be presented
cvNamedWindow( "mywindow", CV_WINDOW_AUTOSIZE );
// Show the image captured from the camera in the window and repeat
while ( 1 ) {
// Get one frame
IplImage* frame = cvQueryFrame( capture );
if ( !frame ) {
fprintf( stderr, "ERROR: frame is null...\n" );
getchar();
break;
}
cvShowImage( "mywindow", frame );
// Do not release the frame!
//If ESC key pressed, Key=0x10001B under OpenCV 0.9.7(linux version),
//remove higher bits using AND operator
if ( (cvWaitKey(10) & 255) == 27 ) break;
}
// Release the capture device housekeeping
cvReleaseCapture( &capture );
cvDestroyWindow( "mywindow" );
return 0;
}
我还尝试通过键入终端对 xawtv -hwscan 进行了尝试.我得到以下输出:
I also tried with xawtv -hwscan using typing terminal. I get this output:
looking for available devices
port 129-144
type : Xvideo, image scaler
name : Intel(R) Textured Video`
/dev/video0: OK
[ -device /dev/video0 ]
type : libv4l
name : HP HD Webcam [Fixed]
flags: capture
然后我可以输入 xawtv video0 来访问我的网络摄像头.我想我的网络摄像头没有问题. 我在使用opencv时遇到麻烦.
then I can access my webcam typing xawtv video0. I think I have no trouble with my webcam. I have trouble with opencv.
推荐答案
几分钟前，我解决了我的问题.我决定将我的解决方案分享给处理类似错误的人.
I solved my problem few minutes ago. And I decided share my solution for people who handling similar error.
首先，我没有安装下面的某些包装(我不记得是哪个包装，所以我将它们全部粘贴了)
First I didnt install some of below packets ( I dont remember which of them, so I paste all of them)
libjpeg62-dev
libjpeg62-dev
libtiff4-dev
libtiff4-dev
zlib1g-dev
zlib1g-dev
libjasper-dev
libjasper-dev
libavcodec-dev
libavcodec-dev
libdc1394-22-dev
libdc1394-22-dev
libgstreamer0.10-dev
libgstreamer0.10-dev
libgstreamer-plugins-base0.10-dev
libgstreamer-plugins-base0.10-dev
libavformat-dev
libavformat-dev
libv4l-dev
libv4l-dev
libswscale-dev
libswscale-dev
然后，您应该使用此代码配置cmake进程
Then You should configure your cmake process with this code
cmake -D CMAKE_BULD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_PYTHON_SUPPORT=ON USE_V4L=ON WITH_TBB=ON -D BUILD_NEW_PYTHON_SUPPORT=ON USE_GStreamer=ON ..
请注意USE_V4L = ON此代码.
Please notice USE_V4L=ON this code..
希望您阅读我的解决方案后能解决.
I hope you solve after reading my solution.
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