Niconico has special barriers that YouTube does not.
There are three primary methods. We'll rank them by audio quality and reliability. niconico to wav
Note: This is 1:1 real-time. A 10-minute song takes 10 minutes. The quality is identical to what you hear, but you risk recording system sounds (email dings, notifications). Niconico has special barriers that YouTube does not
Then convert the downloaded file to WAV using FFmpeg or Audacity Then convert the downloaded file to WAV using
A test was conducted on a 2011 upload of “U.N. Owen Was Her?” (Touhou arrangement). Three versions were compared:
Findings:
Conclusion: The “Niconico-to-WAV” process is not about clarity. It’s about forensic fidelity to a broken playback system.