Extract/convert the audio track of any media URL (mp4, mov, wav, m4a, ogg…) to MP3 — the "mp4 to mp3" conversion, deterministic ffmpeg, no AI. Body: {"url":"https://…/video.mp4","bitrate":"192k"?}. Returns the MP3 as base64.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.02 USDC | 0xaBF4...a9D0 |