OpenCV的VideoCapture不能從我的攝像頭在所有

我使用的是在Ubuntu 13.04（上宏碁C7 Chromebook）的OpenCV 2.4.6閱讀，我使用一個簡單的測試程序，看看我的攝像頭將與合作OpenCV的。它適用於奶酪和Skype，所以我知道攝像頭本身不是問題。OpenCV的VideoCapture不能從我的攝像頭在所有

這裏是我的代碼（編譯沒有任何錯誤）：

#include "opencv2/opencv.hpp" 
#include <stdio.h> 
#include <stdlib.h> 

using namespace std; 
using namespace cv; 

int main(int argc, char *argv[]) 
{ 
    cv::VideoCapture cap; 
    if(argc > 1) 
    { 
     cap.open(string(argv[1])); 
    } 
    else 
    { 
     cap.open(CV_CAP_ANY); 
    } 
    if(!cap.isOpened()) 
    { 
     printf("Error: could not load a camera or video.\n"); 
    } 
    Mat frame; 
    namedWindow("video", 1); 
    for(;;) 
    { 
    waitKey(20); 
    cap >> frame; 
    if(!frame.data) 
    { 
     printf("Error: no frame data.\n"); 
     break; 
    } 
    imshow("video", frame); 
    } 
}

如果我不帶任何參數運行程序（因爲我希望它使用CV_CAP_ANY），我得到

Error: could not load a camera or video. 
init done 
opengl support available 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
Error: no frame data.

如果我指定/ dev/video0（我唯一的相機）作爲參數，我得到

demux_wavpack: (open_wv_file:127) open_wv_file: non-seekable inputs aren't supported yet. 
(ERROR)icvOpenAVI_XINE(): Unable to open source '/dev/video0' 
init done 
opengl support available 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12 
GStreamer Plugin: Embedded video playback halted; module source reported: Could not read from resource. 
Error: no frame data.

如果我指定路徑一個視頻文件作爲參數，它播放視頻就好了。

我很感激任何幫助。提前致謝！

來源

2013-07-12 Jragon

上有opencv的2.4.6 bug，請看一看here

而且試試這個： CV :: VideoCapture帽= CV :: VideoCapture（0）;

希望它有幫助！

來源

2013-07-12 15:05:42 Poko

哇。這在過去的一週裏讓我很難過，所以我很高興他們今天把它固定下來。非常感謝！ – Jragon

不客氣;） – Poko

我剛剛完成刪除2.4.6和安裝2.4.6.1，我的代碼完美無瑕！ – Jragon

您可以嘗試在值20,30,40,50改變waitKey(20)值20至80.一些計算機工程....

來源

2013-09-29 13:53:47

OpenCV的VideoCapture不能從我的攝像頭在所有

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