Indiegogo video 2-4 min: assemble 30 s clips in Timeline

An Indiegogo main campaign video is 2 to 4 minutes, per Indiegogo support, as summarized in search results; confirm on the page. A single generated clip is much shorter, so you assemble it: on Sume, seedance-2.5 accepts 4 to 30 seconds per clip, and Timeline 1.0 joins clips and one audio track into one MP4 at $0.10 per output minute.

The arithmetic

Timeline bills per ceil output minute, and reserves ceil(audio duration / 60) minutes. The clip counts below assume full 30 s clips; shorter clips need more of them.

Clip duration limits and the Timeline rate are from the Sume docs; the docs also say to confirm the rate live in the catalog.

Plan first, render second

Timeline has an unbilled plan route that compiles your document and returns duration, segment count and estimated cost without creating a job. Use it before you spend. Render needs an Idempotency-Key, and every URL must already be a media.sume.com artifact or asset from your workspace; import first.

Declare each slot start on the audio spine. The first start must be 0, later starts must increase, and a transition goes on slots after the first. Slot coverage may trail the spine by at most 0.5 seconds.

curl -X POST https://api.sume.com/v1/timeline-1.0/plan \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "audio": { "url": "https://media.sume.com/artifacts/artf_demo/voiceover.wav", "duration_seconds": 120 },
    "video": [
      { "source_url": "https://media.sume.com/artifacts/artf_demo/c1.mp4", "start": 0, "duration": 30 },
      { "source_url": "https://media.sume.com/artifacts/artf_demo/c2.mp4", "start": 30, "duration": 30, "transition": { "type": "fade", "duration": 0.25 } },
      { "source_url": "https://media.sume.com/artifacts/artf_demo/c3.mp4", "start": 60, "duration": 30, "transition": { "type": "fade", "duration": 0.25 } },
      { "source_url": "https://media.sume.com/artifacts/artf_demo/c4.mp4", "start": 90, "duration": 30, "transition": { "type": "fade", "duration": 0.25 } }
    ]
  }'

Limits worth knowing

• Timeline audio runs 1 to 1800 seconds and video takes 1 to 200 slots.
• Past 12 segments the default strategy chunks the render; single is refused above 12 slots.
• Poll GET /v1/jobs/{id}/status and read GET /v1/jobs/{id}/result for the video_url.
• Check Indiegogo's current page for the file and format requirements, which I did not verify.