Ubuntu 14.04 + Mint 17.1 - Needs python-opencv package installed

[13rac1]

The pip cv2 package doesn't contain a working opencv installation for Ubuntu 14.04 + Mint 17.1. Not sure about other OSs.

Installing the apt-get package makes this program run.

sudo apt-get install python-opencv

[pyskell]

Thank you.

Will add this to the README On Oct 12, 2015 8:46 PM, "Brad Erickson" notifications@github.com wrote:

The pip cv2 package doesn't contain a working opencv installation for Ubuntu 14.04 + Mint 17.1. Not sure about other OSs.

Installing the apt-get package makes this program run.

sudo apt-get install python-opencv

— Reply to this email directly or view it on GitHub https://github.com/pyskell/slouchy/issues/5.

[13rac1]

I've run into the super common: https://bugs.launchpad.net/ubuntu/+source/cheese/+bug/1295247

I suggest recommending the above package, then if that doesn't work, compiling OpenCV from source: http://docs.opencv.org/doc/tutorials/introduction/linux_install/linux_install.html I was able to get a far more detailed error message from OpenCV 3.0:

$ python slouchy.py 
VIDEOIO ERROR: V4L/V4L2: VIDIOC_S_CROP
"sni-qt/24493" WARN  19:20:08.782 void StatusNotifierItemFactory::connectToSnw() Invalid interface to SNW_SERVICE 
VIDEOIO ERROR: V4L2: Pixel format of incoming image is unsupported by OpenCV
Unable to stop the stream.: Bad file descriptor

Either way, this the same issue I've experienced before with an unsupported pixel format for my webcam. None of the different options for libv4lfix the problem.

[dgrant]

I'm not seeing this in the README. Why did you close it eosrei?

[dgrant]

Also needs opencv-data installed for the /usr/share/opencv/haarcascades/haarcascade_frontalface_default.xml file. Please re-open.

[13rac1]

I closed because while it makes the program run, it does not make it functional on my system therefore I cannot claim it is a valid solution.

My webcam is unsupported by the libraries required by OpenCV, same issue I have with Cheese (at greater than 640x480) and Google Hangouts in Chrome. If everything works for your system, please open a new issue with the full steps to reproduce. I made sure to link the Launchpad bug and show all errors for the significant number of people who will encounter this problem.

I cannot say much about the XML file, but I doubt it needs to be outside the repo.

[pyskell]

@eosrei Are you saying your camera works when run at 640x480? If so we may be able to force OpenCV to grab images at a specific resolution. Not sure though, I'd need to look at the docs. 640x480 is a high enough resolution for face detection.

@dgrant For the haarcascade issue I changed the config to use the local repo copy so everyone has a copy even if they're missing opencv-data. Please let me know if this resolves your issue. If not see if there's anything in issue #1. If not please open a new ticket :)

[13rac1]

Yes, the camera works in applications that allow the resolution to be selected. Cheese works at 640x480, but displays a black screen and throws errors at 1280x720. It's just as described on that Launchpad issue. Slouchy may function if the resolution is reduced.