OpenCV的2.3.0+：cvCaptureFromCAM返回null [英] OpenCV 2.3.0+: cvCaptureFromCAM returns null

问题描述

我试图让一个应用程序的Ubuntu 11.04与下OpenCV的2.3.0（稳定）和最新的SVN-修订工作为好。在code完美的作品在Windows下。

I trying to get an application to work with OpenCV 2.3.0 (stable) and latest SVN-Revision as well under Ubuntu 11.04. The Code works flawlessly under Windows.

//includes etc...
int main(){
CvCapture* capture = cvCaptureFromCAM( CV_CAP_ANY );


if ( !capture ) { //is always "NULL" here
    fprintf( stderr, "ERROR: capture is NULL \n" );
    getchar();
    return -1;
}
}

OpenCV的2.3工程一次，但现在它拒绝自去年Ubuntu的更新或什么工作。
有没有一种可能，以获得新的图书馆工作？

OpenCV 2.3 works once but now it refuses to work since last Ubuntu update or something. Is there a possibility to get the newer library to work?

我恢复到了Ubuntu运库，适用于现在，但它是巨大的，如果我能说服最新的稳定版本工作过。

I reverted back to the Ubuntu shipped library which works for now, but it would be great if I can convince the latest stable release to work too.

推荐答案

您可以尝试使用 strace的，看看哪些步骤失败。例如，它可能会试图打开不存在的设备文件（的/ dev /东西），或者你可能有访问permitions问题。无论如何，

You could try to use strace and see which step fails. For example, it might try to open non-existing device file (/dev/something) or you might have problems with access permitions. Anyway,

这篇关于OpenCV的2.3.0+：cvCaptureFromCAM返回null的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！