ioctl VIDIOC_DQEVENT &manvol; VIDIOC_DQEVENT Dequeue event int ioctl int fd int request struct v4l2_event *argp fd &fd; request VIDIOC_DQEVENT argp Dequeue an event from a video device. No input is required for this ioctl. All the fields of the &v4l2-event; structure are filled by the driver. The file handle will also receive exceptions which the application may get by e.g. using the select system call. &cs-str; __u32 type Type of the event. union u &v4l2-event-vsync; vsync Event data for event V4L2_EVENT_VSYNC. __u8 data[64] Event data. Defined by the event type. The union should be used to define easily accessible type for events. __u32 pending Number of pending events excluding this one. __u32 sequence Event sequence number. The sequence number is incremented for every subscribed event that takes place. If sequence numbers are not contiguous it means that events have been lost. struct timespec timestamp Event timestamp. __u32 reserved[9] Reserved for future extensions. Drivers must set the array to zero.