* feat(cli): beats analyses an audio or video file given directly * docs(skills): the beats reference says a file argument is analysed directly
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Generate a project beat grid
Use hyperframes beats when an existing HyperFrames project needs the Studio-compatible beat file for its music track. This is a CLI utility, not a complete video workflow.
npx hyperframes beats
npx hyperframes beats ./my-video
npx hyperframes beats ./my-video --json
Given an audio or video file instead of a folder (npx hyperframes beats music.mp3 --json), beats analyses that file and prints { ok, file, count, bpm, beatTimes }; it writes nothing.
The project must contain a local music <audio> source. Mark it with data-timeline-role="music"; an id containing music, bgm, or soundtrack is also recognized. The command decodes that file with ffmpeg, tracks its beats, and writes beats/<audio-relative-path>.json.
If the track has no steady beat, the command fails and writes nothing. If ffmpeg is missing, run npx hyperframes doctor.
For a whole video cut to a music track, see /hyperframes → references/film.md.