Doubao Seedance 2.5

# Text-to-video (model: seedance-2.5)
curl -X POST https://apimodels.app/api/v1/video/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance-2.5",
    "prompt": "a hummingbird hovering near a bright flower, slow motion",
    "resolution": "720p",
    "aspect_ratio": "16:9",
    "duration": 8
  }'

# Poll until completed (result files are kept 7 days)
curl "https://apimodels.app/api/v1/video/generations?task_id=TASK_ID" \
  -H "Authorization: Bearer YOUR_API_KEY"

# "duration": -1  → the model picks the best length for the prompt.
# "output_format": "mov"  → H.264 + yuv444p + PCM instead of the default mp4.
#
# Real person: register the face in the asset library first, then reference it —
# a RAW real face URL is rejected at create-time, asset:// passes:
#   "reference_image_urls": ["asset://asset-2026...-xxxx"]

# ── Video EDITING — replace / add / remove objects, or edit the audio track ──
# The source clip goes in reference_video_urls and is cited as 视频1 / @video1.
# Editing forces aspect_ratio "adaptive" AND duration -1 (the output keeps the
# source ratio and length). Send either one and you get an immediate 400.
curl -X POST https://apimodels.app/api/v1/video/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance-2.5",
    "prompt": "把视频1改成夜晚雨景,保留人物动作和镜头运动",
    "reference_video_urls": ["https://example.com/source.mp4"],
    "task_type": "edit"
  }'

# ── Video EXTENSION — continue the clip forwards or backwards, round after round ──
# Extension also forces aspect_ratio "adaptive", but duration is yours: 4-30 or -1.
curl -X POST https://apimodels.app/api/v1/video/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance-2.5",
    "prompt": "续写视频1,人物继续向前走进地铁站",
    "reference_video_urls": ["https://example.com/source.mp4"],
    "duration": 10,
    "task_type": "extend"
  }'