1V4L2_VBI_UNSYNC
2V4L2_VBI_INTERLACED
3V4L2_VBI_ITU_525_F1_START
4V4L2_VBI_ITU_525_F2_START
5V4L2_VBI_ITU_625_F1_START
6V4L2_VBI_ITU_625_F2_START
7