To post-process vtuber 歌枠 downloaded with youtube-dl, split it into individual songs. Dependency: ffmpeg
Example Usage: Search for comment under the stream, for the starting time and name of individual songs. Copy it into config.txt. Also add other metadata (see example config1.txt).
Then run
youtube-dl -x --audio-format mp3 https://www.youtube.com/watch?v=N1fx5LqxUMY&t=2116s
go build
./vtsplit config.txt