[OpenCV and Python 2] "No module named cv_bridge_boost" on Windows
I am writing a python script on Windows, which uses the package cv_bridge. I already have installed Python 2.7.18 and pip in Windows 10, as well as OpenCV (cv2) and the package cv_bridge.
I can import OpenCV without problem in my python script by doing import cv2
The problem comes with the following line:
from cv_bridge.boost.cv_bridge_boost import getCvType
It returns the following error:
ImportError: No module named cv_bridge_boost
The way I used to install cv_bridge was by installing the setup.py of the package
(https://github.com/ros-perception/vision_opencv)
Then, I realized that this method didn't create any boost.cv_bridge_boost inside my Python path (C:\Python27\Lib\site-packages\cv_bridge). So, what I did, was to seach in my Ubuntu System (where the package cv_bridge works fine), and copy the missing files.
Finally, I ended up having in my C:\Python27\Lib\site-packages\ the following: a cv2 folder which contains all OpenCV files, and a cv_bridge folder (the package). Inside, a folder boost with the files __init__,py and cv_bridge_boost.so.
I though that was the correct way, but even having the file, the script is still returning the same error.
By searching I saw that the problem is probably in this last file (cv_bridge_boost.so), but until now I just found solutions for MacOS. What about Windows? Did someone have a problem with this file before? Thank you in advance.
You tagged this as Kinetic: just making sure, you do have a ROS 1 Kinetic install on Windows?
No, it´s not installed. The Python script that I am writing doesn't need of
roscoreto work. However, I need single packages from Kinetic for the script, so I´ve been installing them (such as rosbag). The script is totally independent fromroscore..sofiles are shared object files for Linux based platforms, you cannot use those on Windows.You'll have to somehow get the
cv_bridge_boostlibraries built on Windows. That is what I meant with my question "you have installed * on Windows?".Understood then. Since I don´t have ROS installed on Windows, only the packages that I build on Ubuntu, is there any possibility to obtain such libraries to use the package
cv_bridgeon Windows? There must be a way, but oddly I don't find any.I'm not terribly familiar with the build process of those
cv_bridge_pythonlibraries, but you'd probably have to somehow get them build. That may not be trivial (as C++<->Python integration never is, and you're doing it on an 'unsupported' platform). I'm sorry I can't help you with this now.Perhaps you can tell us what you ultimately want to do. This might be an xy-problem and we might be spending time on solving something that isn't needed.
My Python script which runs on Windows, takes video-data from a .bag file and shows it on a GUI, which uses QWidgets (PyQT). I already managed to use the rosbag API to take the video, but in order to display it I need to convert it by using OpenCV.
Here´s where
cv_bridgecomes out, linking the .bag file and OpenCV. In my script I use a function which belongs to the package (imgmsg_to_cv2), which takes the image from the .bag and converts it to cv2, and it needs to accesscv_bridge_boost. That would be a preview about what my script does