Problem with reading video file opencv 3.1 [closed]

asked 2015-12-29 11:32:06 -0500

valentine gravatar image

Hi All,

I just recently installed opencv3.1 and i wanted to read a video file. Everything seem fine to as i have used code before. Please anyone look at this:

VideoCapture capture;

while (1) {
    capture.open("C:/Users/hp/Documents/motionTrackingTutorial/bouncingBall.avi");

    if (!capture.isOpened()) {
        cout << "ERROR ACQUIRING VIDEO FEED\n";
        getchar();
        return -1;
    }

          // ...............other code are implemented here
    }

The video file is not read as "ERROR ACQUIRING VIDEO FEED" is been displayed. Please can anyone help.

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Closed for the following reason the question is answered, right answer was accepted by sturkmen
close date 2020-09-27 11:31:02.611368

Comments

capture.open("C:/Users/hp/Documents/motionTrackingTutorial/bouncingBall.avi"); should be before while

LBerger gravatar imageLBerger ( 2015-12-29 13:21:15 -0500 )edit

Hi LBerger, tried that still did not work.

valentine gravatar imagevalentine ( 2015-12-29 13:28:55 -0500 )edit

You have got an example in samples/cpp/starter_video.cpp. You can try this example :

cpp-example-starter_video.exe f:/lib/opencv/samples/data/768x576.avi

If it works try with your video (I have installed opencv in f:/lib)

LBerger gravatar imageLBerger ( 2015-12-29 13:53:55 -0500 )edit

Hi LBerger,

The example in starter_video.cpp still fails read from the video file and then opens my webcam as seen from the code snippet below:

VideoCapture capture(arg); //try to open string, this will attempt to open it as a video file or image sequence
if (!capture.isOpened()) //if this fails, try to open as a video camera, through the use of an integer param
    capture.open(atoi(arg.c_str()));er code here
valentine gravatar imagevalentine ( 2015-12-29 14:23:03 -0500 )edit

Copy 768x576.avi in folder where is exe file like this you can check problem with path name :

cpp-example-starter_video.exe 768x576.avi

After to open this video you will need opencv_ffmpeg310_64.dll. If opencvcannot find this dll there is no error message. You can check if everything is OK using "depends"

LBerger gravatar imageLBerger ( 2015-12-29 14:36:13 -0500 )edit

Hi LBerger,

I found a way around this, it was resolved by adding the path to opencv_ffmpeg310_64.dll to my path variable. All was history.

Thanks for your response.

valentine gravatar imagevalentine ( 2015-12-30 02:14:19 -0500 )edit