buzz@liptor ~ $ v4lctl list
ioctl: VIDIOC_G_STD(std=0xb7708cc0bfcdc388 [PAL_H,PAL_K,PAL_M,PAL_N,?,?,SECAM_B,SECAM_G,SECAM_H,SECAM_L,?ATSC_8_VSB,ATSC_16_VSB,(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)]): Invalid argument
attribute  | type   | current | default | comment
-----------+--------+---------+---------+-------------------------------------
norm       | choice | (null)  | (null)  |
input      | choice | ov534   | ov534   | ov534
bright     | int    |       0 |       0 | range is 0 => 255
contrast   | int    |      32 |      32 | range is 0 => 255
Auto White | bool   | on      | on      |
Exposure   | int    |     120 |     120 | range is 0 => 255
Auto Gain  | bool   | on      | on      |
Main Gain  | int    |      20 |      20 | range is 0 => 63
HFlip      | bool   | off     | off     |
VFlip      | bool   | off     | off     |
Light Freq | choice | Disable | Disable | Disabled 50 Hz
Sharpness  | int    |       0 |       0 | range is 0 => 63