Step 1: extract shots. Step 2: include clips. Step 3: analyze beats. Step 4: Shuffle. Step 5: Build video — FFmpeg stitches each slot as its own trim, then concatenates into one MP4 with your music (not scrubbing the original file).
Tap the thumbnail to include / exclude (dimmed = skipped for shuffle). Drag the grip onto a beat slot to place that clip.
Thumbnails are 2× upscaled for preview.
Toggle Cut on to include or drop main beat, bass, snare, or clap hits. Shuffle never repeats a clip and keeps picks ≥3.5s apart in your source video.