[SOLVED] Raspberry Pi 3: OpenCV 3.4.0 missing some files after installation and can't be called within my code

Issue

I hope you're doing good.

I've been working on a robot for couple of months and got it working properly recently. Sadly, my code got deleted including all libraries, tried to install OpenCV couple of times but I'm still getting errors

I used this link to install OpenCV 3.4.0 with the latest version of Raspbian https://www.life2coding.com/install-opencv-3-4-0-python-3-raspberry-pi-3/

ImportError: libavcodec.so.56: cannot open shared object file: No such file or directory

Is there a proper way to install all libraries ? I'll include all libraries I used at the beginning of the code below.

Thanks in advance

   [import cv2
    import cv2.cv as cv
    import numpy as np
    from gopigo import *
    import sys
    import RPi.GPIO as GPIO
    import time
    import os
    import multiprocessing as mp

Solution

I was using 'Raspbian Stretch Lite' but didn't work, I might have missed something up while installing OpenCV library

I tried latest version of 'Raspbian Stretch with desktop and recommended software' from Raspberrypi's website https://www.raspberrypi.org/downloads/raspbian/

and followed all steps stated here to install OpenCV https://www.pyimagesearch.com/2017/09/04/raspbian-stretch-install-opencv-3-python-on-your-raspberry-pi/

Once done with OpenCV use this command within your code to relocate packages

import sys

sys.path.append('/usr/local/lib/python2.7/site-packages') 

OpenCV is working fine to me now. Thanks to J.D. and Jayjayyy for guiding me and helping me to solve this issue, I really appreciate your help :)

Answered By - MSTx05