#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <errno.h>

#include <sys/ioctl.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>

#include <linux/ioctl.h>
#include <linux/videodev.h>

int main( int argc, char *argv[])
{
	const char device[] = "/dev/video0";
	int r;

	int fd = open (device, O_RDWR);
	assert(fd);

	struct video_mbuf mbuf = { 0 };
	r = ioctl (fd, VIDIOCGMBUF, &mbuf);
	assert (r == 0);

	printf ("Frames: %i\n", mbuf.frames);	

	close (fd);

	return 0;
}