opencv/samples/gpu/video_writer.cpp

114 lines
2.8 KiB
C++
Raw Normal View History

2012-10-17 09:12:04 +02:00
#include <iostream>
#include "opencv2/opencv_modules.hpp"
2013-07-23 12:29:21 +02:00
#if defined(HAVE_OPENCV_CUDACODEC) && defined(WIN32)
2012-10-17 09:12:04 +02:00
#include <vector>
#include <numeric>
#include "opencv2/core.hpp"
2013-07-23 12:29:21 +02:00
#include "opencv2/cudacodec.hpp"
#include "opencv2/highgui.hpp"
2012-10-17 09:12:04 +02:00
2014-11-28 19:19:20 +01:00
#include "tick_meter.hpp"
2012-10-17 09:12:04 +02:00
int main(int argc, const char* argv[])
{
if (argc != 2)
{
std::cerr << "Usage : video_writer <input video file>" << std::endl;
return -1;
}
const double FPS = 25.0;
cv::VideoCapture reader(argv[1]);
if (!reader.isOpened())
{
std::cerr << "Can't open input video file" << std::endl;
return -1;
}
2013-08-26 09:34:37 +02:00
cv::cuda::printShortCudaDeviceInfo(cv::cuda::getDevice());
2012-10-17 09:12:04 +02:00
cv::VideoWriter writer;
cv::Ptr<cv::cudacodec::VideoWriter> d_writer;
2012-10-17 09:12:04 +02:00
cv::Mat frame;
2013-08-26 09:34:37 +02:00
cv::cuda::GpuMat d_frame;
2012-10-17 09:12:04 +02:00
std::vector<double> cpu_times;
std::vector<double> gpu_times;
2014-11-28 19:19:20 +01:00
TickMeter tm;
2012-10-17 09:12:04 +02:00
for (int i = 1;; ++i)
{
std::cout << "Read " << i << " frame" << std::endl;
reader >> frame;
if (frame.empty())
{
std::cout << "Stop" << std::endl;
break;
}
if (!writer.isOpened())
{
std::cout << "Frame Size : " << frame.cols << "x" << frame.rows << std::endl;
std::cout << "Open CPU Writer" << std::endl;
if (!writer.open("output_cpu.avi", cv::VideoWriter::fourcc('X', 'V', 'I', 'D'), FPS, frame.size()))
2012-10-17 09:12:04 +02:00
return -1;
}
if (d_writer.empty())
2012-10-17 09:12:04 +02:00
{
2013-07-24 11:55:18 +02:00
std::cout << "Open CUDA Writer" << std::endl;
2012-10-17 09:12:04 +02:00
const cv::String outputFilename = "output_gpu.avi";
d_writer = cv::cudacodec::createVideoWriter(outputFilename, frame.size(), FPS);
2012-10-17 09:12:04 +02:00
}
d_frame.upload(frame);
std::cout << "Write " << i << " frame" << std::endl;
tm.reset(); tm.start();
writer.write(frame);
tm.stop();
cpu_times.push_back(tm.getTimeMilli());
tm.reset(); tm.start();
d_writer->write(d_frame);
2012-10-17 09:12:04 +02:00
tm.stop();
gpu_times.push_back(tm.getTimeMilli());
}
std::cout << std::endl << "Results:" << std::endl;
std::sort(cpu_times.begin(), cpu_times.end());
std::sort(gpu_times.begin(), gpu_times.end());
double cpu_avg = std::accumulate(cpu_times.begin(), cpu_times.end(), 0.0) / cpu_times.size();
double gpu_avg = std::accumulate(gpu_times.begin(), gpu_times.end(), 0.0) / gpu_times.size();
std::cout << "CPU [XVID] : Avg : " << cpu_avg << " ms FPS : " << 1000.0 / cpu_avg << std::endl;
std::cout << "GPU [H264] : Avg : " << gpu_avg << " ms FPS : " << 1000.0 / gpu_avg << std::endl;
return 0;
}
#else
int main()
{
2013-07-24 11:55:18 +02:00
std::cout << "OpenCV was built without CUDA Video encoding support\n" << std::endl;
return 0;
}
#endif