ocr video screen program

#!/bin/bash

# Program to recognize text on the screen.

function wait_for_window() {
  # first parameter  - window title or part of the window title
  window_title="$1"
  time_sec=900
  while [[ 0 -ne $time_sec ]]; do
    echo "$time_sec, waiting... to appear"
    sleep 1
    time_sec=$[$time_sec-1]
    xdotool search --onlyvisible --name "$window_title" windowactivate
    if [[ $? == 0 ]]; then
      echo "window found"
      break
    fi
  done
}

function start_program() {
    window_title="dpScreenOCR"
    ps cax | grep "dpscreenocr"
    if [[ $? == 0 ]]; then
        echo "skipping" > /dev/null
    else
         nohup dpscreenocr &>/dev/null &
         wait_for_window "$window_title"
         xdotool getactivewindow windowminimize
    fi
    sleep 1
    xte 'keydown Control_L' 'keydown Alt_L' 'key grave' 'keyup Alt_L' 'keyup Control_L'
    sleep 3
    xte 'keydown Control_L' 'keydown Alt_L' 'key grave' 'keyup Alt_L' 'keyup Control_L'
}

start_program

# depndencies:
    # sudo apt install xautomation xdotool
    # sudo add-apt-repository ppa:daniel.p/dpscreenocr
    # sudo apt update
    # sudo apt install dpscreenocr
    # ctrl+alt+grave - default screen capture keystroke