|
Hi, im looking for “capturing images using Python under windows”, where can i find some information about it??
Im also looking for imformation about steaming real time video from an ip cam in python.!!!
If anyone can help me it please emial at aagarcia@uninorte.edu.co or write here
Thank you.
183 days ago
on August 10, 2009 at 4:09 am
and written by Andres Garcia
Thanks for taking the time to post this. It worked great for me!
194 days ago
on July 30, 2009 at 3:52 am
and written by Jay
same error, my video device is on /dev/video0. How can we solve this problem?
202 days ago
on July 21, 2009 at 1:37 pm
and written by pione
If you are receiving a None object from cvCreateCameraCapture, make sure you are passing the correct argument (it appears to be the video device).
For example, my camera is connected to /dev/video2, so I instantiate with highgui.cvCreateCameraCapture(2).
221 days ago
on July 2, 2009 at 10:57 pm
and written by Benjamin
Same here, same error…
I tried to “print” “camera” object wich is “None”. So, it means that “highgui.cvCreateCameraCapture(0)” returns None object… And I don’t know why, how…
231 days ago
on June 22, 2009 at 8:01 pm
and written by Metal3d
Awesome!
for the guys having trouble with it:
take a closer look at the function get_image() and dont run another webcam application at the same time
245 days ago
on June 9, 2009 at 10:40 am
and written by Hogwog
Thanks a lot, you really help me out, i’ve been searching for some code like this for hours!!
Thanks again
254 days ago
on May 31, 2009 at 12:18 am
and written by Daniel Banda
I’m still getting this error like other users above:
pho@Asgard:~/Desktop$ python image.py
Traceback (most recent call last):
File “image.py”, line 29, in
im = get_image()
File “image.py”, line 14, in get_image
im = opencv.cvGetMat(im)
File “/var/lib/python-support/python2.5/opencv/cv.py”, line 3826, in cvGetMat
return _cv.cvGetMat(*args)
RuntimeError: openCV Error:
Status=Null pointer
function name=cvGetMat
error message=NULL array pointer is passed
file_name=cxarray.cpp
line=2780
Any solutions?
295 days ago
on April 20, 2009 at 9:21 am
and written by Pho
works great, but having trouble trying to get multiple webcams to work.
295 days ago
on April 19, 2009 at 10:25 pm
and written by endeavormac
Hey man works great on my mobii netbook with Ubuntu 8.04
Thanks a lot!
296 days ago
on April 19, 2009 at 1:06 pm
and written by Seppel
Thanks for posting this, exactly what I was looking for to do video processing on linux in python.
324 days ago
on March 21, 2009 at 7:01 pm
and written by Clayton Gulick
Thanks for this!! Also spent 5 hours searching and finally found this article.
333 days ago
on March 13, 2009 at 8:33 am
and written by Luke Venediger
I got the “NULL array pointer is passed”, when I forgot to compile opencv with v4l2 support.
333 days ago
on March 12, 2009 at 4:02 pm
and written by unlotto
hi i clicked the V4L/V4L2 link above but it gave me an error 404: The page you have requested could not be found.
any links?
thank you so much for the help. 
341 days ago
on March 5, 2009 at 12:46 pm
and written by roy
Worked as shown on Jaunty Alpha 5 on an Acer Aspire One with built-in webcam – nice, compact code and great exposure to OpenCV, PIL, pygame and other code. Thanks!
343 days ago
on March 3, 2009 at 3:54 am
and written by Brian
almost works for me (hardy) — but the image comes up upside down & green.
First frame looks like proper color, then it changes. Not a display thing, I can save the file as .jpg and it looks the same.
Anyone have any ideas?
370 days ago
on February 3, 2009 at 11:13 pm
and written by dan miller
Works like a charm .. thanks a billion;
Could you tell how we can capture images from the feed.
That would be helpful..
374 days ago
on January 31, 2009 at 6:26 am
and written by Snape
Genius! It works “out of the box” (out of the paste and copy, actually) for me, and I use ubuntu 8.10 too.
Maybe because I’m using a v4l2 webcam?
Thanks anyway,
Julian
375 days ago
on January 30, 2009 at 12:56 am
and written by julian
I to have had trouble getting it to run on Ubuntu 8.10. I get the same error as those above. Any help would be greatly appreciated. 
381 days ago
on January 23, 2009 at 11:53 pm
and written by Danny
You, Sir, are my hero! Thank you so much! I’ve spent countless hours trying to get one of the pyv4l libs to work!
381 days ago
on January 23, 2009 at 7:27 pm
and written by Galileon Galilei
Ubuntu 8.10, still compiles and installs, just throws the error (same as Mir, above) :
Traceback (most recent call last):
File “example.py”, line 29, in
im = get_image()
File “example.py”, line 14, in get_image
im = opencv.cvGetMat(im)
File “/var/lib/python-support/python2.5/opencv/cv.py”, line 3826, in cvGetMat
return _cv.cvGetMat(*args)
RuntimeError: openCV Error:
Status=Null pointer
function name=cvGetMat
error message=NULL array pointer is passed
file_name=cxarray.cpp
line=2780
384 days ago
on January 21, 2009 at 5:58 am
and written by Max M
doesnt work with me in ubuntu 8.10
Traceback (most recent call last):
File “web.py”, line 30, in
im = get_image()
File “web.py”, line 15, in get_image
tmp = opencv.cvGetMat(im)
File “/var/lib/python-support/python2.5/opencv/cv.py”, line 3826, in cvGetMat
return _cv.cvGetMat(*args)
RuntimeError: openCV Error:
Status=Null pointer
function name=cvGetMat
error message=NULL array pointer is passed
file_name=cxar
407 days ago
on December 29, 2008 at 11:16 am
and written by Mir
Cool! I will be trying this out very soon, I think you have saved me a bit of work!
This was the first thing Google brought me, and probably all I need to get started!
414 days ago
on December 22, 2008 at 10:53 am
and written by Steve B
Hey thanks a lot!
Work very nice with my camera, good work!, Busman.
460 days ago
on November 5, 2008 at 3:01 pm
and written by Busman
Hi,
I had to slightly modify it to run on ubuntu 8.04:
def get_image():
im = highgui.cvQueryFrame(camera)
# this one is the new line to make it work
tmp = opencv.cvGetMat(im)
#convert Ipl image to PIL image
return opencv.adaptors.Ipl2PIL(tmp)
475 days ago
on October 22, 2008 at 1:35 am
and written by kpoman
Hello Man.
10x, I checked around 5 other examples and this one works like a charm.
Shalom,
Ram-on.
489 days ago
on October 7, 2008 at 6:33 pm
and written by Ram-on Agmon
Thanks for the research and code!
I tried this a few weeks back, and gave up after finding no hints that gave me the right direction.
This code works out of the box. Thank you!
498 days ago
on September 29, 2008 at 7:48 am
and written by Harshad
Thank you so much!!! I LOVE YOU TO BITS!!!!
I have been searching for about 4-5 hours now … And as you say in your intro .. no one blogs these kind of things… I almost stopped searching 
BUT … You saved me 
Thanks a million
Coral
576 days ago
on July 12, 2008 at 3:29 pm
and written by [ZAF]-Coral
I would love to play with multiple view geometry also, is there anyone who has done that with python?
598 days ago
on June 20, 2008 at 7:14 pm
and written by Bryan
Great!
tanks it works for me!!
652 days ago
on April 28, 2008 at 1:08 pm
and written by diego
Thx a lot. Does anybody knows if there is info on synchronizing the acquisition from two or more webcams. I want to play a bit with multiple view geometry

750 days ago
on January 20, 2008 at 3:47 pm
and written by alon
Thanks so much for this post. 1 page of code. Great.
Just switched to linux and this was one of the main hardware
problems I ran into.
Nice work!
765 days ago
on January 5, 2008 at 8:02 pm
and written by webbge
I searching this for hour, and it’s works !!
thank you, that really help me a lot.
771 days ago
on December 30, 2007 at 8:03 pm
and written by NoopyKs
|
|
I searching this for hour, and it’s works !!
thank you, that really help me a lot.
771 days ago
on December 30, 2007 at 8:03 pm
and written by NoopyKs
Thanks so much for this post. 1 page of code. Great.
Just switched to linux and this was one of the main hardware
problems I ran into.
Nice work!
765 days ago
on January 5, 2008 at 8:02 pm
and written by webbge
Thx a lot. Does anybody knows if there is info on synchronizing the acquisition from two or more webcams. I want to play a bit with multiple view geometry

750 days ago
on January 20, 2008 at 3:47 pm
and written by alon
Great!
tanks it works for me!!
652 days ago
on April 28, 2008 at 1:08 pm
and written by diego
I would love to play with multiple view geometry also, is there anyone who has done that with python?
598 days ago
on June 20, 2008 at 7:14 pm
and written by Bryan
Thank you so much!!! I LOVE YOU TO BITS!!!!
I have been searching for about 4-5 hours now … And as you say in your intro .. no one blogs these kind of things… I almost stopped searching 
BUT … You saved me 
Thanks a million
Coral
576 days ago
on July 12, 2008 at 3:29 pm
and written by [ZAF]-Coral
Thanks for the research and code!
I tried this a few weeks back, and gave up after finding no hints that gave me the right direction.
This code works out of the box. Thank you!
498 days ago
on September 29, 2008 at 7:48 am
and written by Harshad
Hello Man.
10x, I checked around 5 other examples and this one works like a charm.
Shalom,
Ram-on.
489 days ago
on October 7, 2008 at 6:33 pm
and written by Ram-on Agmon
Hi,
I had to slightly modify it to run on ubuntu 8.04:
def get_image():
im = highgui.cvQueryFrame(camera)
# this one is the new line to make it work
tmp = opencv.cvGetMat(im)
#convert Ipl image to PIL image
return opencv.adaptors.Ipl2PIL(tmp)
475 days ago
on October 22, 2008 at 1:35 am
and written by kpoman
Hey thanks a lot!
Work very nice with my camera, good work!, Busman.
460 days ago
on November 5, 2008 at 3:01 pm
and written by Busman
Cool! I will be trying this out very soon, I think you have saved me a bit of work!
This was the first thing Google brought me, and probably all I need to get started!
414 days ago
on December 22, 2008 at 10:53 am
and written by Steve B
doesnt work with me in ubuntu 8.10
Traceback (most recent call last):
File “web.py”, line 30, in
im = get_image()
File “web.py”, line 15, in get_image
tmp = opencv.cvGetMat(im)
File “/var/lib/python-support/python2.5/opencv/cv.py”, line 3826, in cvGetMat
return _cv.cvGetMat(*args)
RuntimeError: openCV Error:
Status=Null pointer
function name=cvGetMat
error message=NULL array pointer is passed
file_name=cxar
407 days ago
on December 29, 2008 at 11:16 am
and written by Mir
Ubuntu 8.10, still compiles and installs, just throws the error (same as Mir, above) :
Traceback (most recent call last):
File “example.py”, line 29, in
im = get_image()
File “example.py”, line 14, in get_image
im = opencv.cvGetMat(im)
File “/var/lib/python-support/python2.5/opencv/cv.py”, line 3826, in cvGetMat
return _cv.cvGetMat(*args)
RuntimeError: openCV Error:
Status=Null pointer
function name=cvGetMat
error message=NULL array pointer is passed
file_name=cxarray.cpp
line=2780
384 days ago
on January 21, 2009 at 5:58 am
and written by Max M
You, Sir, are my hero! Thank you so much! I’ve spent countless hours trying to get one of the pyv4l libs to work!
381 days ago
on January 23, 2009 at 7:27 pm
and written by Galileon Galilei
I to have had trouble getting it to run on Ubuntu 8.10. I get the same error as those above. Any help would be greatly appreciated. 
381 days ago
on January 23, 2009 at 11:53 pm
and written by Danny
Genius! It works “out of the box” (out of the paste and copy, actually) for me, and I use ubuntu 8.10 too.
Maybe because I’m using a v4l2 webcam?
Thanks anyway,
Julian
375 days ago
on January 30, 2009 at 12:56 am
and written by julian
Works like a charm .. thanks a billion;
Could you tell how we can capture images from the feed.
That would be helpful..
374 days ago
on January 31, 2009 at 6:26 am
and written by Snape
almost works for me (hardy) — but the image comes up upside down & green.
First frame looks like proper color, then it changes. Not a display thing, I can save the file as .jpg and it looks the same.
Anyone have any ideas?
370 days ago
on February 3, 2009 at 11:13 pm
and written by dan miller
Worked as shown on Jaunty Alpha 5 on an Acer Aspire One with built-in webcam – nice, compact code and great exposure to OpenCV, PIL, pygame and other code. Thanks!
343 days ago
on March 3, 2009 at 3:54 am
and written by Brian
hi i clicked the V4L/V4L2 link above but it gave me an error 404: The page you have requested could not be found.
any links?
thank you so much for the help. 
341 days ago
on March 5, 2009 at 12:46 pm
and written by roy
I got the “NULL array pointer is passed”, when I forgot to compile opencv with v4l2 support.
333 days ago
on March 12, 2009 at 4:02 pm
and written by unlotto
Thanks for this!! Also spent 5 hours searching and finally found this article.
333 days ago
on March 13, 2009 at 8:33 am
and written by Luke Venediger
Thanks for posting this, exactly what I was looking for to do video processing on linux in python.
324 days ago
on March 21, 2009 at 7:01 pm
and written by Clayton Gulick
Hey man works great on my mobii netbook with Ubuntu 8.04
Thanks a lot!
296 days ago
on April 19, 2009 at 1:06 pm
and written by Seppel
works great, but having trouble trying to get multiple webcams to work.
295 days ago
on April 19, 2009 at 10:25 pm
and written by endeavormac
I’m still getting this error like other users above:
pho@Asgard:~/Desktop$ python image.py
Traceback (most recent call last):
File “image.py”, line 29, in
im = get_image()
File “image.py”, line 14, in get_image
im = opencv.cvGetMat(im)
File “/var/lib/python-support/python2.5/opencv/cv.py”, line 3826, in cvGetMat
return _cv.cvGetMat(*args)
RuntimeError: openCV Error:
Status=Null pointer
function name=cvGetMat
error message=NULL array pointer is passed
file_name=cxarray.cpp
line=2780
Any solutions?
295 days ago
on April 20, 2009 at 9:21 am
and written by Pho
Thanks a lot, you really help me out, i’ve been searching for some code like this for hours!!
Thanks again
254 days ago
on May 31, 2009 at 12:18 am
and written by Daniel Banda
Awesome!
for the guys having trouble with it:
take a closer look at the function get_image() and dont run another webcam application at the same time
245 days ago
on June 9, 2009 at 10:40 am
and written by Hogwog
Same here, same error…
I tried to “print” “camera” object wich is “None”. So, it means that “highgui.cvCreateCameraCapture(0)” returns None object… And I don’t know why, how…
231 days ago
on June 22, 2009 at 8:01 pm
and written by Metal3d
If you are receiving a None object from cvCreateCameraCapture, make sure you are passing the correct argument (it appears to be the video device).
For example, my camera is connected to /dev/video2, so I instantiate with highgui.cvCreateCameraCapture(2).
221 days ago
on July 2, 2009 at 10:57 pm
and written by Benjamin
same error, my video device is on /dev/video0. How can we solve this problem?
202 days ago
on July 21, 2009 at 1:37 pm
and written by pione
Thanks for taking the time to post this. It worked great for me!
194 days ago
on July 30, 2009 at 3:52 am
and written by Jay
Hi, im looking for “capturing images using Python under windows”, where can i find some information about it??
Im also looking for imformation about steaming real time video from an ip cam in python.!!!
If anyone can help me it please emial at aagarcia@uninorte.edu.co or write here
Thank you.
183 days ago
on August 10, 2009 at 4:09 am
and written by Andres Garcia
|