Hi,
I'm using V1.3 on a Ubuntu 9.04 system and try the following scenario.
Set the values of my webcam using v4l2ucp and once this is done I use
v4l2ctrl -d /dev/video0 -s cam_settings
When I try to set the values with
v4l2ctrl -d /dev/video0 -l cam_settings
I get the following message.
Error querying control White Balance ...
Sorry I can't be more exact because I'm doing this by memory but any way the first setting of the cam_settings file is the White Balance.
I already tried to decrees the value in the file but the result stays the same.
Regards,
Peter
I too faced the same issue.
Just digging around the code and found that V4L2_CTRL_FLAG_NEXT_CTRL path is not working. I just undefined (#undef V4L2_CTRL_FLAG_NEXT_CTRL) this macro, it is working fine.