Function im_video_v4l1

pub unsafe extern "C" fn im_video_v4l1(
    im: *mut VipsImage,
    device: *const c_char,
    channel: c_int,
    brightness: c_int,
    colour: c_int,
    contrast: c_int,
    hue: c_int,
    ngrabs: c_int,
) -> c_int