how to create and run video at the same time.

2.4.10

asked 2019-01-02 01:54:46 -0600

elax89
1 ●1

I extracted the frame from the video and made a color conversion. I want to show the process. However, an error occurs when playing the video. I do not know how to get the video to play at the same time it is created. I would really appreciate it if you could help. ps. It can be shown to be somewhat aggressive because it is asking through the translator. I need help urgently.

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please show us, what you tried, so far.

berak ( 2019-01-02 01:56:03 -0600 )edit

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answered 2019-01-02 07:28:32 -0600

MxBx
16 ●2

Assuming you just wan to show the processed frame, here is what your loop could look like.

Mat in_frame, res_frame;
VideoWriter result_video(......); //use parameters that suit your need
while(true)
{

 cap >> in_frame;
 if(in_frame.empty())
    break;

res_frame = myFrameProcessor(in_frame);
result_video.write(res_frame);

imshow( "Frame", res_frame );

char c=(char)waitKey(25);
if(c==27)
  break;
}

Ideally you would want to create a different thread that does the showing part by creating a shared queue of cv::Mat objects...