<commit_before><commit_msg>add doc<commit_after>## Install ffmpeg
```
sudo add-apt-repository ppa:samrog131/ppa
sudo apt-get update
sudo apt-get install ffmpeg
```

## Notes
- Using python3 with sigal can fix most of the unicode path problem with python2
{'fraction_non_alphanumeric': 0.09055118110236221, 'fraction_numerical': 0.01968503937007874, 'mean_word_length': 5.375, 'pattern_counts': {'":': 0, '<': 3, '<?xml version=': 0, '>': 3, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '5172212', 'n_tokens_mistral': 88, 'n_tokens_neox': 78, 'n_words': 29}