diff --git a/AAXtoMP3 b/AAXtoMP3
index 9761f38..177368a 100755
--- a/AAXtoMP3
+++ b/AAXtoMP3
@@ -146,6 +146,31 @@ if ! [[ $(type -P "$GREP") ]]; then
   exit 1
 fi
 
+# -----
+# Detect ffmpeg and ffprobe
+if [[ "x$(type -P ffmpeg)" == "x" ]]; then
+  echo "ERROR ffmpeg was not found on your env PATH variable"
+  echo "Without it, this script will break."
+  echo "INSTALL:" 
+  echo "MacOS:   brew install ffmpeg"
+  echo "Ubuntu:  sudo apt-get update; sudo apt-get install ffmpeg libav-tools x264 x265"
+  echo "RHEL:    yum install ffmpeg"
+  exit 1
+fi 
+
+# -----
+# Detect ffmpeg and ffprobe
+if [[ "x$(type -P ffprobe)" == "x" ]]; then
+  echo "ERROR ffprobe was not found on your env PATH variable"
+  echo "Without it, this script will break."
+  echo "INSTALL:" 
+  echo "MacOS:   brew install ffmpeg"
+  echo "Ubuntu:  sudo apt-get update; sudo apt-get install ffmpeg libav-tools x264 x265"
+  echo "RHEL:    yum install ffmpeg"
+  exit 1
+fi 
+
+
 # -----
 # Detect if we need mp4art for cover additions to m4a & m4b files.
 if [[ "x${extension}" == "xm4a" && "x$(type -P mp4art)" == "x" ]]; then
diff --git a/README.md b/README.md
index b31a6f0..2776bea 100644
--- a/README.md
+++ b/README.md
@@ -110,6 +110,43 @@ __Note:__ At least one of the above must be exist. The code must also match the
 * Default out put directory is the base directoy of each file listed. Plus the genre, Artist and Title of the Audio Book.
 * The default codec is mp3
 * The default output is by chapter.
+
+### Installing Dependencies.
+#### FFMPEG,FFPROBE
+__Ubuntu, Linux Mint, Debian__
+```
+sudo apt-get update
+sudo apt-get install ffmpeg libav-tools x264 x265
+```
+__CentOS, RHEL & Fedora__
+```
+# CentOS/RHEL and Fedora users make sure that you have enabled atrpms repository in system. Let’s begin installing FFmpeg as per your operating system.
+yum install ffmpeg
+
+```
+__MacOS__
+```
+brew install ffmpeg
+```
+
+#### mp4art
+_Note: This is an optional dependency._
+
+__Ubuntu, Linux Mint, Debian__
+```
+sudo apt-get update
+sudo apt-get install mp4v2-utils
+```
+__CentOS, RHEL & Fedora__
+```
+# CentOS/RHEL and Fedora users make sure that you have enabled atrpms repository in system. Let’s begin installing FFmpeg as per your operating system.
+yum install mp4v2-utils
+
+```
+__MacOS__
+```
+brew install mp4v2
+```
  
 ## Anti-Piracy Notice
 Note that this project **does NOT ‘crack’** the DRM. It simply allows the user to