requirements.txt mentioned in README.md

README.md

@@ -27,6 +27,11 @@ MoviePy (https://zulko.github.io/moviepy/#) is required for replacing the audio
 pip install moviepy
 ```
 
+You can also use `requirements.txt` file to install all needed dependencies at once:
+```
+pip install -r requirements.txt
+```
+
 ## Usage
 Once the libraries are installed, you should customise the configuration file `config.yaml`.
 There are two required parameters, `INPUT_PATH` and `OUTPUT_PATH` that specifies where all input files are stored and where output files shall be saved.