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    beat montage

    1

    Synchronize video cuts to musical beats, BPM, and energy drops using FableCut MCP.

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    beat montage

    beat montage

    Example session with this skill installed

    I have 'summer_vibes.mp3' and five clips of surfing. Make a high-energy montage that cuts to the beat and hits hard on the drop.

    • Read your context and instructions
    • Compiled the beat montage
    • Generated the image

    I have analyzed summer_vibes.mp3 and found a tempo of 124 BPM with a significant energy drop at 14.5 seconds. I've mapped your five surfing clips across a 2-beat grid, ensuring the most dynamic aerial shot lands exactly on the drop with a speed ramp and impact shake.

    Montage Configuration

    ComponentSettingDetail
    BPM124Fast pace, 1-beat cells for energy peaks
    Grid2-beat cells~0.96s per shot for rhythmic flow
    The Drop14.52sHero shot with speed: 3x -> 0.4x ramp
    VFXImpact Layer0.3s shake and RGB split on the drop
    SFXWhooshswoosh-fast.mp3 at every 4th bar cut
    // Timeline Segment: The Drop
{
  "op": "setProject",
  "tracks": [
    {
      "track": "V1",
      "clips": [
        {
          "mediaId": "surf_hero_01",
          "start": 14.52,
          "duration": 1.92,
          "keyframes": {
            "speed": [{"t":0,"v":3}, {"t":1.1,"v":3}, {"t":1.3,"v":0.4,"ease":"ease-out"}]
          }
        }
      ]
    },
    {
      "track": "V3",
      "kind": "adjust",
      "start": 14.52,
      "duration": 0.3,
      "props": { "shake": 20, "rgbSplit": 8 }
    }
  ]
}

    Next steps

    1. Review the markers on your FableCut timeline to see the beat alignment.
    2. If you have more B-roll, I can fill the remaining 20 seconds of the track.
    3. Click Export in the browser compositor to render the final montage.

    beat-montage.png

    PNG · 1536×1024

    Generated

    Example file from a real run - the skill writes it into your workspace.

    Connects securely to your tools. The creator never sees your data.

    What you get

    Sync video cuts to audio beats and BPM automaticallyDetect musical drops to trigger hero shots and VFX impactsMap clip motion to audio energy levels for better pacingPlace rhythmic SFX and transitions on timeline transients

    About this skill

    The problem

    Manually syncing video cuts to musical beats is tedious, requiring frame-by-frame scrubbing to find transients and match clip durations. AI video tools often ignore musical energy, leading to montages that feel disconnected from the soundtrack.

    What it does

    • Analyzes audio files for BPM, beat timestamps, and energy curves to generate a rhythmic timing grid.
    • Sets project markers automatically at beat intervals or bars to snap the timeline to the music.
    • Maps clip selection to the musical energy curve, placing high-motion footage at peak volume and slow shots at quiet points.
    • Identifies "the drop" in a track and applies hero shot effects like speed ramps, screen shakes, and RGB splits.
    • Automates transitions and SFX placement, including whooshes on fast cuts and pulses on beat hits.

    Frameworks & tools

    This skill requires ffmpeg on the system PATH and the FableCut MCP toolset for project manipulation and timeline rendering.

    Why this beats prompting it yourself

    Generic LLMs cannot "hear" audio or calculate precise millisecond-perfect timing. This skill uses dedicated onset detection to turn audio data into a structured grid, ensuring every cut lands exactly on a beat without manual adjustment.

    Use cases

    • Generating high-energy social media reels from raw gameplay or event footage.
    • Creating cinematic trailer drafts where cuts must sync with an orchestral score.
    • Building rhythmic product showcases that speed up and slow down with the music.
    • Automating B-roll montages for YouTube intros and outros.

    Known limitations

    Beat detection accuracy depends on the song's onset strength; tracks with weak percussion may yield less precise grids. The skill requires sufficient B-roll to fill all generated beat cells without excessive repetition.

    How to install

    Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.

    ~30 seconds
    1. 1

      Download the ZIP

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    2. 2

      Unzip into your skills folder

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    3. 3

      Ask your agent to use it

      Restart the agent if it was already running. It picks the skill up automatically - no config needed.

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    Security scanned

    Verified clean 13 days ago

    • Passed all security checks, Safe to install

    Listed13 days ago

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