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