Fitness studio class teasers: 8 clips a month with a music bed

One class teaser is a 15-second Wan 3.0 clip, a $0.125 Music 1.0 track and a $0.10 Timeline render: $2.10 at 720p. Eight teasers for a month of classes cost $16.80, or $9.30 at 480p.

Music on the beat

Music 1.0 takes a text brief with no duration field, so put the tempo and arc in the prompt: a number of beats per minute and a named moment. For a 15-second spot, ask for a short track with a drop near the end, then let Timeline cut it to length.

Render with a bed

audio.mode: "silence" declares the length without a voice file, and soundtrack lays the music under the picture, fading out at the end.

{
  "audio": { "mode": "silence", "duration_seconds": 15 },
  "soundtrack": {
    "url": "https://media.sume.com/artifacts/artf_demo/bed.mp3",
    "gain_db": -3,
    "fade_out_seconds": 2
  },
  "video": [
    { "source_url": "https://media.sume.com/artifacts/artf_demo/hiit.mp4",
      "start": 0, "duration": 15 }
  ],
  "output": { "fade_in_seconds": 0.3, "fade_out_seconds": 0.5 }
}

Monthly budget

Costs scale with the number of classes you promote.

Real people

Do not show an AI figure performing a technique you teach, and do not imply a coach or a member who is not real. Use generated clips for atmosphere and keep instruction on real footage.

The brief that makes the bed fit

Music 1.0 has no duration parameter, so ask for a track that fits a short cut and trim it to length in Timeline. A usable brief names a tempo in beats per minute, two or three instruments, and one moment such as a drop at the twelve second mark, and ends with instrumental, no vocals. Generate one bed per class type rather than one per teaser, then reuse the file across the month. The music line in the table then drops for a studio with repeating classes.