Synthesia Video Converter

Converts Synthesia video to MIDI, note sheets PDF and Music XML.
Works with YouTube video links.
Should work with any piano roll software, but tested on Synthesia.

TODOs

1. Remove irrelevant parts of a video: autodetect intro and outro.
2. Make it work with flashy starts when keys are immediately near the real play line: autodetect actual play line.
3. Make it work with background images below keys: remove static parts of the frame.
4. Make it work with a lot of sparkles: improve thresholding.

Enchantments

1. Add pausing video during debugging.
2. Add switching between visual modes during debugging (original frame, gray scale, threshold, thick line etc).