python and webcam

[dfaber]

Hi,
I have Logitech webcam and I need to grab images on Fedora Core 4 (not
my favorite distro). Are there any python modules available for doing
this? Any hints or suggestions would be welcome.

Thanks.

 

[Philippe Bouige]

I have Logitech webcam and I need to grab images on Fedora Core 4 (not
my favorite distro). Are there any python modules available for doing
this? Any hints or suggestions would be welcome.

You can try this :

http://videocapture.sourceforge.net/

 

[dfaber]

It is a Win32 Python Extension. I am looking for something that work
on Linux.

 

[Fredrik Lundh]

It is a Win32 Python Extension. I am looking for something that work
on Linux.

here's one:

http://antonym.org/libfg

(for more alternatives, google for "python webcam linux" or some
variation thereof)

</F>

 

[dfaber]

Thank you for your help. I will look around for v4l modules too.

 

[Terry Reedy]

Hi,
I have Logitech webcam and I need to grab images on Fedora Core 4 (not
my favorite distro). Are there any python modules available for doing
this? Any hints or suggestions would be welcome.

If is one of their ball cameras (or other shape)b with a USB connection,
then I would expect that you access it through the TWAIN protocol. (I
don't know how to do that from python, but wish I did!). If it is a truly
web-ready camera with a built-in server and ethernet connection, then you
access it via an http request to its inet address.

 

[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?