Update README.md

README.md

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 # video2anki
 a tool to generate anki decks from subtitles of videos, complete with audio embedding and cjk info.
+
+
+# setup
+before anything, install ffmpeg, python and pip
+
+you might also want to install anki, to review the generated decks
+
+setup the venv, pick a path of your convenience. for example:
+```
+python -m .venv
+```
+for more information on python venvs, look at https://docs.python.org/3/library/venv.html
+
+install dependencies. this tool currently uses genanki to generate the anki deck, and pysrt to parse srt subtitle files (the only external subtitle format supported by this tool so far)
+```
+.venv/bin/pip install genanki pysrt
+```
+
+now you need
+- a video file, with subtitles in both source and target languge as srt files
+- some patience. genanki is REALLY slow (I mean it's python after all...). if you donate me enough xmr (42vkdWEgEcDP66jbn7KvsqbvaLGixmhs1VydJxJJqD35ZXYfnPjqzsTQ6SVRsmJfqNTtWEqF8KUSHF1frac9ecNvLa8EG2Y) i might consider a rewrite of genanki and probaly this script in a decent language to speed up things.
+
+now run like this:
+```
+.venv/bin/python video2anki.py --media-file movie.mp4 --track-a movie_jp.srt --track-b movie_en.srt --title Movie --cjk-mode j
+```
+
+note that cjk-mode flag? it tells video2anki to generate anki cards with weblinks to popular online dictionaries to lookup hanzi, kanji and hanja characters.
+
+# caution
+this tool extracts audio from the movie for embedding into anki cards, and it generally tries to match audio and subtitles generously.
+however, there's known issues with subtitles which contain audio descriptions. so, while it's mostly straightforward you *might* need to edit the anki deck.
+tl;dr i can't fix broken or ill-suited subtitles.