Screen capture program in C or C++ and Linux

Question

I am looking for a program to capture screen in Linux using C or Cpp. can someone help with giving a skeleton structure or program what can help me.

Thanks and Regards.

Read manual for libX11: you can grab display and save its content into file. — Eddy_Em, Jun 05 '13 at 06:46
Take a code from `xwd` sources: you need only 1-2 pages of code! — Eddy_Em, Jun 05 '13 at 06:52

score 2 · Answer 1 · answered Jun 05 '13 at 06:42

2

How to capture screen with ffmpeg:

Use the x11grab device:

ffmpeg -f x11grab -r 25 -s 1024x768 -i :0.0+100,200 output.flv

This will grab the image from desktop, starting with the upper-left corner at (x=100, y=200) with the width and height of 1024x768.

If you need audio too, you can use alsa like this:

ffmpeg -f x11grab -r 25 -s 1024x768 -i :0.0+100,200 -f alsa -ac 2 -i pulse output.flv

So you can simply place this in capture.sh and run it from your code:

#include <cstdlib>

int main(){ std::system("./capture.sh"); }

If you have to do it without calling external utilities, you can use libffmpeg directly.

answered Jun 05 '13 at 06:42

nurettin

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That looks good. I tried using external libraries but couldnt find a perfect program. are there any sample programs that use third party api to capture screen shot? – Pferd Jun 05 '13 at 06:45
It worked http://stackoverflow.com/questions/15507788/making-a-screenshot-using-xlib-and-cairo-libs-fail – Pferd Jun 05 '13 at 07:50

Screen capture program in C or C++ and Linux

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