Visual Servoing Platform version 3.5.0
tutorial-video-reader.cpp
1
2#include <visp3/gui/vpDisplayGDI.h>
3#include <visp3/gui/vpDisplayOpenCV.h>
4#include <visp3/gui/vpDisplayX.h>
6#include <visp3/core/vpTime.h>
7#include <visp3/io/vpVideoReader.h>
9
16int main(int argc, char **argv)
17{
18#if (VISP_HAVE_OPENCV_VERSION >= 0x020100)
19 try {
20 std::string videoname = "video.mp4";
21
22 for (int i = 0; i < argc; i++) {
23 if (std::string(argv[i]) == "--name")
24 videoname = std::string(argv[i + 1]);
25 else if (std::string(argv[i]) == "--help" || std::string(argv[i]) == "-h") {
26 std::cout << "\nUsage: " << argv[0]
27 << " [--name <video name> (default: " << videoname << ")]"
28 << " [--help] [-h]\n" << std::endl;
29 return 0;
30 }
31 }
32
38 g.setFileName(videoname);
41 g.open(I);
43 std::cout << "Video name : " << videoname << std::endl;
44 std::cout << "Video framerate: " << g.getFramerate() << "Hz" << std::endl;
45 std::cout << "Video dimension: " << I.getWidth() << " " << I.getHeight() << std::endl;
46
47#ifdef VISP_HAVE_X11
48 vpDisplayX d(I);
49#elif defined(VISP_HAVE_GDI)
50 vpDisplayGDI d(I);
51#elif defined(VISP_HAVE_OPENCV)
52 vpDisplayOpenCV d(I);
53#else
54 std::cout << "No image viewer is available..." << std::endl;
55#endif
56 vpDisplay::setTitle(I, "Video reader");
57
58 unsigned cpt = 1;
60 while (!g.end()) {
63 double t = vpTime::measureTimeMs();
66 g.acquire(I);
69 vpDisplay::displayText(I, 20, 20, "Click to quit", vpColor::red);
70 std::stringstream ss;
71 ss << "Frame: " << cpt ++;
72 vpDisplay::displayText(I, 40, 20, ss.str(), vpColor::red);
74 if (vpDisplay::getClick(I, false))
75 break;
77 vpTime::wait(t, 1000. / g.getFramerate());
79 }
80 std::cout << "End of video was reached" << std::endl;
81 } catch (const vpException &e) {
82 std::cout << e.getMessage() << std::endl;
83 }
84#else
85 (void)argc;
86 (void)argv;
87 std::cout << "Install OpenCV and rebuild ViSP to use this example." << std::endl;
88#endif
89}
static const vpColor red
Definition: vpColor.h:217
Display for windows using GDI (available on any windows 32 platform).
Definition: vpDisplayGDI.h:129
The vpDisplayOpenCV allows to display image using the OpenCV library. Thus to enable this class OpenC...
Use the X11 console to display images on unix-like OS. Thus to enable this class X11 should be instal...
Definition: vpDisplayX.h:135
static bool getClick(const vpImage< unsigned char > &I, bool blocking=true)
static void display(const vpImage< unsigned char > &I)
static void setTitle(const vpImage< unsigned char > &I, const std::string &windowtitle)
static void flush(const vpImage< unsigned char > &I)
static void displayText(const vpImage< unsigned char > &I, const vpImagePoint &ip, const std::string &s, const vpColor &color)
error that can be emited by ViSP classes.
Definition: vpException.h:72
const char * getMessage() const
Definition: vpException.cpp:90
unsigned int getWidth() const
Definition: vpImage.h:246
unsigned int getHeight() const
Definition: vpImage.h:188
Class that enables to manipulate easily a video file or a sequence of images. As it inherits from the...
void acquire(vpImage< vpRGBa > &I)
void open(vpImage< vpRGBa > &I)
void setFileName(const std::string &filename)
double getFramerate()
VISP_EXPORT int wait(double t0, double t)
VISP_EXPORT double measureTimeMs()