opencv/modules/highgui/test/test_ffmpeg.cpp

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#include "test_precomp.hpp"
#include "opencv2/highgui/highgui.hpp"

#ifdef HAVE_FFMPEG

using namespace cv;
using namespace std;

class CV_FFmpegWriteBigVideoTest : public cvtest::BaseTest
{
public:
    void run(int)
    {
        const int img_r = 4096;
        const int img_c = 4096;
        Size frame_s = Size(img_c, img_r);
        const double fps = 30;
        const double time_sec = 2;
        const int coeff = static_cast<int>(static_cast<double>(cv::min(img_c, img_r)) / (fps * time_sec));

        Mat img(img_r, img_c, CV_8UC3, Scalar::all(0));
        try
        {
            VideoWriter writer(string(ts->get_data_path()) + "video/output.avi", CV_FOURCC('X', 'V', 'I', 'D'), fps, frame_s);

            if (writer.isOpened() == false) ts->set_failed_test_info(cvtest::TS::FAIL_EXCEPTION);

            for (int i = 0 ; i < static_cast<int>(fps * time_sec); i++ )
            {
                //circle(img, Point2i(img_c / 2, img_r / 2), cv::min(img_r, img_c) / 2 * (i + 1), Scalar(255, 0, 0, 0), 2);
                rectangle(img, Point2i(coeff * i, coeff * i), Point2i(coeff * (i + 1), coeff * (i + 1)),
                          Scalar::all(255 * (1.0 - static_cast<double>(i) / (fps * time_sec * 2) )), -1);
                writer << img;
            }
        }
        catch(...)
        {
            ts->set_failed_test_info(cvtest::TS::FAIL_EXCEPTION);
        }
        ts->set_failed_test_info(cvtest::TS::OK);
    }
};

TEST(Highgui_FFmpeg_WriteBigVideo, regression) { CV_FFmpegWriteBigVideoTest      test; test.safe_run(); }

#endif