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// The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt
/*
This is an example that illustrates how to use the ffmpeg wrappers
for taking screen grabs and plotting to a GUI window.
*/
#include <cstdio>
#include <dlib/media.h>
#include <dlib/gui_widgets.h>
using namespace std;
using namespace dlib;
int main()
try
{
const auto demuxers = ffmpeg::list_demuxers();
const bool screen_grab_available = std::find(begin(demuxers), end(demuxers), "x11grab") != demuxers.end();
if (screen_grab_available)
{
ffmpeg::demuxer::args args;
args.filepath = "";
args.input_format = "x11grab";
ffmpeg::demuxer cap(args);
if (!cap.is_open() || !cap.video_enabled())
{
printf("Failed to open demuxer for screen grab\n");
return EXIT_FAILURE;
}
image_window win;
ffmpeg::frame frame;
array2d<rgb_pixel> img;
while (cap.read(frame))
{
convert(frame, img);
win.set_image(img);
}
}
else
{
printf("Sorry your installation of ffmpeg doesn't support screen grab\n");
}
return EXIT_SUCCESS;
}
catch (const std::exception& e)
{
printf("%s\n", e.what());
return EXIT_FAILURE;
}
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