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sudo apt-get install build-essential cmake git pkg-config libgtk-3-devsudo 
sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev libxvidcore-dev libx264-devsudo 
sudo apt-get install libjpeg-dev libpng-dev libtiff-dev gfortran openexr libatlas-base-devsudo 
sudo apt-get install python3-dev python3-numpy libtbb2 libtbb-dev libdc1394-22-dev

mkdir ~/opencv_build && cd ~/opencv_build
git clone https://github.com/opencv/opencv.git
git clone https://github.com/opencv/opencv_contrib.git

cd ~/opencv_build/opencv

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Displays IP camera feed

gst-launch-1.0 -v rtspsrc location=rtsp://root:root@192.168.1.220/axis-media/media.amp latency=0 \
                  ! rtph264depay \
                  ! h264parse \
                  ! avdec_h264 \
                  ! videoconvert \
                  ! fpsdisplaysink text-overlay=true sync=false

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#!/bin/sh

# Crete SMTPE bar video 
ffmpeg -f lavfi -i smptebars=duration=10:size=1920x1080:rate=30 smptebars.mp4


# raw h264 from file to HTTP server (in loop)
ffmpeg.exe -stream_loop -1 -re -i <filename>.mp4 -c:v libx264 \
             -vprofile baseline -b:v 600k -bufsize 600k -tune zerolatency -pix_fmt yuv420p \
             -an \

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link a folder

$ ln -s ~/Documents/dev ~/dev

find a file

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# gstreamer
# Check with: 
# $ which gst-launch-1.0
# gst-launch-1.0 --gst-version
sudo apt-get install gstreamer1.0-plugins-base gstreamer1.0-plugins-good 
sudo apt-get install gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly 
sudo apt-get install gstreamer1.0-libav gstreamer1.0-doc gstreamer1.0-tools

sudo apt-get install gstreamer1.0-libav gstreamer1.0-doc gstreamer1.0-tools

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#!/bin/sh

sudo apt-get update
sudo apt-get install
sudo apt-get upgrade

# tools
sudo apt install git

# tweak tools