How to write OpenCV frames into Gstreamer pipeline?

[Kevron Rees]

You probably want an opencv filter similar to
https://github.com/tripzero/opencvfilter/blob/master/opencvfilter.py

On Wed, Jan 13, 2016 at 8:35 PM Zheng <superxingzheng at gmail.com> wrote:

> I want to stream video which is processed by opencv through network. I have
> working codes capturing frames from gstreamer appsink using opencv's
> VideoCapture with Gstreamer enabled when building opencv.
> But writing opencv Mat frames into gst pipeline seems to be tricky.
> Here is a piece of code to show you what I want to do. I hope some one who
> has similar experiences can give me some hint. Thanks in advance!
>
> #include <iostream>
> #include <iomanip>
> #include <opencv2/opencv.hpp>
>
> using namespace std;
> using namespace cv;
>
> int main(int argc, char** argv) {
>         /*
>          * TODO: figure out a working pipeline.
>          */
>         string test_pipe = "appsrc ! autovideosink";
>
>         VideoCapture cap(0);
>         if (!cap.isOpened())
>                 return -1;
>         Mat frame;
>
>         VideoWriter writer(test_pipe, VideoWriter::fourcc('Y', 'U', 'Y',
> 'V'),
> 30.0, Size(640, 480), true);
>         if (!writer.isOpened())
>                 return -1;
>
>         //namedWindow("test", 1);
>         double t = 0.0;
>         while(1) {
>                 t = (double)getTickCount();
>                 cap >> frame;
>
>                 // TODO: do some process here
>
>                 writer << frame;
>                 //imshow("test", frame);
>                 if (waitKey(1) == 27)
>                         break;
>                 t = ((double)getTickCount() - t) / getTickFrequency(); //
> in millisecond.
>                 cout << "Frame Rate = " << setw(8) << 1.0 / t << " fps" <<
> '\r';
>         }
>         return 0;
> }
>
>
>
>
> --
> View this message in context:
> http://gstreamer-devel.966125.n4.nabble.com/How-to-write-OpenCV-frames-into-Gstreamer-pipeline-tp4675258.html
> Sent from the GStreamer-devel mailing list archive at Nabble.com.
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