for %i in (*.mp4) do ffmpeg -i "%i" -vn -acodec libmp3lame -ab 320k -ar 44100 -f mp3 "%~ni.mp3"
for %i in (*.mp4) do ffmpeg -i "%i" -vn -acodec libmp3lame -ab 320k -ar 44100 -f mp3 "%~ni.mp3"
https://github.com/zhangbo2008/Trie_with_informationExtraction_and_fuzzy_matchingv2