Fast wrapper for v4l2.
use rscam::{Camera, Config};
let mut camera = Camera::new("/dev/video0").unwrap();
camera.start(&Config {
interval: (1, 30),
resolution: (1280, 720),
format: b"MJPG",
..Default::default()
}).unwrap();
for i in 0..10 {
let frame = camera.capture().unwrap();
let mut file = fs::File::create(&format!("frame-{}.jpg", i)).unwrap();
file.write_all(&frame[..]).unwrap();
}The wrapper uses v4l2 (e.g. v4l2_ioctl() instead of ioctl()) until feature no_wrapper is
enabled. The feature can be useful when it's desirable to avoid dependence on libv4l2.