M README.md → README.md

@@ -5,5 +5,37 @@ ![The Matrix](/promo-images/matrix.png)
 ![Wall-E](/promo-images/walle.png)
 ![Doctor Strange](/promo-images/strange.png) 
 
-If you provide the subtitles then it will also embed the subtitles into the final mp4 file.
+## Requirements
+<ul>
+  <p><a href="https://ffmpeg.org/">ffmepeg</a> - A cli-tool that can encode/decode media files</p>
+  <p><a href="https://pypi.python.org/pypi/imdbpie">imdbpie</a> - A Python module for IMDb</p>
+  <p><a href="https://pypi.python.org/pypi/tmdbsimple">tmdbsimple</a> - A Python wrapper for The Movie Database API v3</p>
+  <p><a href="https://pypi.python.org/pypi/mutagen">mutagen</a> - Python module to handle media files' metadata
+</ul>
+
+## Installing ffmpeg
+You need to first download ffmpeg ((from here))[https://ffmpeg.org/download.html] and add it to your PATH variable if on windows.  
+Here's a (wikiHow article on how to install ffmpeg on Windows)[http://www.wikihow.com/Install-FFmpeg-on-Windows]
+
+## Installing Python module dependencies
+<ul>
+  <p>imdbpie - <pre><code>pip install imdbpie</code></pre></p>
+  <p>tmdbpie - <pre><code>pip install tmdbsimple</code></pre></p>
+  <p>mutagen - <pre><code>pip install mutagen</code></pre></p>
+</ul>
+
+## How to use
+<ol>
+  <p>Move all the movie files you want to be tagged into one folder</p>
+  <p>If you want subtitles to be embeded into the movie file(s) then add a subtitle file (srt only) in the same folder named exactly the same as the movie file(s).</p>
+  <p>Run the script in that directory and sit back and relax till it ends executing.</p>
+</ol>
+
+## Notes
+<ul>
+  <p>This script only works for mp4 and mkv file types.</p>
+  <p>Make sure if you are having an mkv file, it should not contain any type of picture based subtitles(hdmv-pgs/vobsub,etc). You can use (MKVToolNix)[https://mkvtoolnix.download/] or any other similar gui utility to quickly remove the picture based subtitles. If the file already has an srt subtitle then the script will just copy it.</p>
+  <p>If you would like to use your own poster image then add an image file (jpg only) in the same folder and rename it to the same as the movie file.</p>
+  <p>Although I have provided my own TMDb API key in the source, I would recommend you get you own from (here)[https://www.themoviedb.org/documentation/api]
+</ul>