python and webcam

[dfaber]

Hi again,
 I've tried a the Sane interface from PIL and I get the following
error, when I run the demo_pil.py from the Sane directory.
------------------------------------------------------------
SANE version: (16777231, 1, 0, 15)
Available devices= [('v4l:/dev/video0', 'Noname', 'Logitech QuickCam
Pro 3000', 'virtual device')]
Traceback (most recent call last):
  File "/PyWebcam/demo_pil.py", line 17, in ?
    s.br_x=320. ; s.br_y=240.
  File "/usr/lib/python2.4/site-packages/sane.py", line 150, in
__setattr__
    raise AttributeError, 'Inactive option: '+key
AttributeError: Inactive option: br_x
------------------------------------------------------------

Next, I looked at v4l support for python with absolutely no
documentation. I tried to build the modules and I get the following
error:
------------------------------------------------------------
 python setup.py build
running build
running build_ext
building 'v4l' extension
gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -m32 -march=i386 -mtune=pentium4
-fasynchronous-unwind-tables -D_GN U_SOURCE -fPIC -fPIC
-I/usr/include/python2.4 -c v4l.c -o build/temp.linux-i686- 2.4/v4l.o
v4l.c: In function 'v4l_getImage':
v4l.c:890: warning: pointer targets in assignment differ in signedness
v4l.c: In function 'initv4l':
v4l.c:1585: error: 'VIDEO_AUDIO_BALANCE' undeclared (first use in
this function)
v4l.c:1585: error: (Each undeclared identifier is reported only once
v4l.c:1585: error: for each function it appears in.)
error: command 'gcc' failed with exit status 1
------------------------------------------------------------

I also looked at libfg http://antonym.org/libfg and I get the following
errors again:
-------------------------------
python setup.py build
running build
running build_ext
building 'fg' extension
gcc -pthread -shared build/temp.linux-i686-2.4/fgmodule.o -L. -lfg -o
build/lib.linux-i686-2.4/fg.so
/usr/bin/ld: cannot find -lfg
collect2: ld returned 1 exit status
error: command 'gcc' failed with exit status 1

I google-ed extensively have so far found only these three packages.
Any ideas why I get these error messages?