ViSP  2.10.0
tutorial-video-recorder.cpp
#include <visp/vpDisplayGDI.h>
#include <visp/vpDisplayGTK.h>
#include <visp/vpDisplayOpenCV.h>
#include <visp/vpDisplayX.h>
#include <visp/vpTime.h>
#include <visp/vpVideoWriter.h>
#include <visp/vpV4l2Grabber.h>
int main(int argc, const char *argv[])
{
#if ((defined(VISP_HAVE_V4L2) || (VISP_HAVE_OPENCV_VERSION >= 0x020100)) && (defined(VISP_HAVE_X11) || defined(VISP_HAVE_GDI) || defined(VISP_HAVE_OPENCV) || defined(VISP_HAVE_GTK)))
std::string opt_videoname = "video-recorded.mpg";
int opt_device = 0;
for (int i=0; i<argc; i++) {
if (std::string(argv[i]) == "--device")
opt_device = atoi(argv[i+1]);
else if (std::string(argv[i]) == "--name")
opt_videoname = std::string(argv[i+1]);
else if (std::string(argv[i]) == "--help") {
std::cout << "\nUsage: " << argv[0] << " [--device <device number>] [--name <video name>] [--help]\n" << std::endl;
return 0;
}
}
std::cout << "Use device: " << opt_device << std::endl;
std::cout << "Record video in: " << opt_videoname << std::endl;
try {
//vpImage<vpRGBa> I; // for color images
vpImage<unsigned char> I; // for gray images
#if defined(VISP_HAVE_V4L2)
std::ostringstream device;
device << "/dev/video" << opt_device;
g.setDevice(device.str());
g.open(I);
g.acquire(I);
#elif defined(VISP_HAVE_OPENCV)
cv::VideoCapture g(opt_device);
if(!g.isOpened()) { // check if we succeeded
std::cout << "Failed to open the camera" << std::endl;
return -1;
}
cv::Mat frame;
g >> frame; // get a new frame from camera
#endif
std::cout << "Image size: " << I.getWidth() << " " << I.getHeight() << std::endl;
#if defined(VISP_HAVE_X11)
#elif defined(VISP_HAVE_GDI)
#elif defined(VISP_HAVE_OPENCV)
#elif defined(VISP_HAVE_GTK)
#endif
d.init(I, 0, 0, "Camera view");
vpVideoWriter writer;
#ifdef VISP_HAVE_FFMPEG
// Set up the bit rate
writer.setBitRate(1000000);
// Set up the codec to use
# if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(54,51,110) // libavcodec 54.51.100
writer.setCodec(CODEC_ID_MPEG2VIDEO);
# else
writer.setCodec(AV_CODEC_ID_MPEG2VIDEO);
# endif
#elif VISP_HAVE_OPENCV_VERSION >= 0x030000
writer.setCodec( cv::VideoWriter::fourcc('P','I','M','1') ); // MPEG-1 codec
#elif VISP_HAVE_OPENCV_VERSION >= 0x020100
writer.setCodec( CV_FOURCC('P','I','M','1') );
#endif
writer.setFileName(opt_videoname);
writer.open(I);
bool recording = false;
for(;;) {
#if defined(VISP_HAVE_V4L2)
g.acquire(I);
#elif defined(VISP_HAVE_OPENCV)
g >> frame;
#endif
if (recording == false) {
vpDisplay::displayText(I, 10, 10, "A click to start recording", vpColor::green);
if (vpDisplay::getClick(I, false))
recording = true;
}
else {
writer.saveFrame(I);
vpDisplay::displayText(I, 10, 10, "Recording: A click to stop and exit", vpColor::red);
if (vpDisplay::getClick(I, false))
break;
}
}
std::cout << "The video was recorded in \"" << opt_videoname << "\"" << std::endl;
}
catch(vpException e) {
std::cout << "Catch an exception: " << e << std::endl;
}
#else
(void)argc;
(void)argv;
std::cout << "Install OpenCV and rebuild ViSP to use this example." << std::endl;
#endif
}