For those people using NTSC, and a v4l television app (eg xawtv), changing
video standards doesn't work (the v4l compatibility layer isn't complete in
this respect).  To get around this, use the std=x option in the xinsmod line
for bttv-v4l2 in update.

Values for X can be:
PAL: 1 (default)
NTSC: 11
SECAM: 21

If you require a specific subclass of one of these, look in 
bttv-v4l2-xxxx/cc/videodev.h . you can use (almost) any V4L2_STD_xxx value.
