"bad src image pointer" after read frame of video in OpenCV

Asked Jul 02 '14 at 12:11

Active Jul 02 '14 at 13:04

Viewed 1,170 times

VideoCapture cap;
cap.open("Path_to_directory\\%03d.jpg"); 
for (int i = 0; i < number_of_frames; ++i)
    {
        Mat frame;
        cap >> frame;
        //...
    }

In the line "cap >> frame;" "bad src image pointer" is printed to console. None of the following frames of video could not be retrieved.

Is there a specific property of image should have to captured with VideoCapture then retrieving to a Mat?

Probably there is, because frames could be retrieved with code above. However after I manipulated them with Gimp, then I saved with overwriting them. Their some property should be changed while overwriting, but I don't know what are those.

Thanks.

Note: OpenCV version 2.4.9

edited Jul 02 '14 at 13:04

asked Jul 02 '14 at 12:11

γιάννης

2

most probably your images went bad, when you manipulated them. (not so much a coding problem). also, do *not* save them as jpg, those are quite problematic with image-processing due to lossy compression. – berak Jul 02 '14 at 12:20
Thank you @berak. Also after doing manipulation with Paint there wasn't such problem. – γιάννης Jul 02 '14 at 12:40
As far as I remember .bmp is lossless compression. Is it? Which extension should I use? – γιάννης Jul 02 '14 at 13:13
yes. use bmp, or png. – berak Jul 02 '14 at 13:20

"bad src image pointer" after read frame of video in OpenCV

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