seedance-pipeline

API, ComfyUI, and post-processing for Seedance 2.0.

Platform Access

| Surface | Endpoint / App | Notes | |---|---|---| | Web | jimeng.jianying.com (Dreamina) | 4–15 s, up to 1080p | | Mobile | CapCut / Jianying · Xiaoyunque | 5–10 s | | API | Volcengine Doubao-Seedance-2.0 | See rate limits below | | Consumer | Doubao app | Standard web limits |

Volcengine API

POST https://ark.cn-beijing.volces.com/api/v3/videos/generations
Authorization: Bearer <API_KEY>
Content-Type: application/json

{
  "model": "Doubao-Seedance-2.0",
  "prompt": "<compiled plain-text prompt>",
  "duration": 8,
  "aspect_ratio": "16:9",
  "resolution": "1080p",
  "seed": 42
}

Rules

• Never send raw JSON schema — compile to plain text first.
• seed is optional; omit for variation, set for reproducibility.
• Check status field in response: queued → processing → completed | failed.
• Poll at 5 s intervals; timeout after 120 s.

File Budget ("Rule of 12")

| Type | Max count | Max size each | Format | |---|---|---|---| | Image | 9 | 30 MB | JPG · PNG · WEBP | | Video | 3 | combined ≤ 15 s total | MP4 · MOV | | Audio | 3 | total ≤ 15 s | MP3 | | Total files | 12 | — | — |

ComfyUI Node Workflow

[Load Image / Load Video] → [Seedance2 Sampler]
      ↓                           ↓
[CLIP Text Encode]          [Prompt Compiler]
      └────────────────────────→ ↓
                         [Video Output Node]
                                 ↓
                      [Frame Interpolation]
                                 ↓
                         [Upscale Node]
                                 ↓
                       [Color Grade Node]
                                 ↓
                        [Export / Mux Audio]

Key node parameters: duration, aspect_ratio, resolution, seed, motion_strength.

Post-Processing Chain

1 · Upscale

• Tool: Topaz Video AI · Real-ESRGAN · ffmpeg scale=iw*2:ih*2
• Target: 720p → 1080p (standard) · 1080p → 2K (premium)

2 · Frame Interpolation

• Tool: RIFE v4.x · DAIN
• Standard: 24 fps → 60 fps (smooth motion)
• Fight / fast action: 24 fps → 120 fps

3 · Color Grade

• Tools: DaVinci Resolve · FFmpeg LUT
• Workflow: normalize exposure → apply LUT → mask-lift shadows → finalize.
• LUT slots: Rec.709 (web) · Log-C (archive).

4 · Audio Mux

• Merge generated stereo audio with video: ffmpeg -i video.mp4 -i audio.mp3 -c:v copy -c:a aac -shortest out.mp4

5 · Metadata Clean

• Strip generation metadata before distribution: exiftool -all= output.mp4
• Rename: {project}_{shot}_{take}_{date}.mp4

6 · Composite (optional)

• Layer generated clips in After Effects / DaVinci Fusion.
• Match color temperature across cuts before export.

Output Specs

| Use case | Resolution | FPS | Container | Audio | |---|---|---|---|---| | Web / social | 1080p | 30 | MP4 H.264 | AAC 192k stereo | | Film festival | 2K | 24 | MOV ProRes | PCM 48kHz | | Archive | 2K | 24 | MKV H.265 | FLAC stereo |

Routing

For prompt issues → [skill:seedance-prompt] For camera/storyboard → [skill:seedance-camera] For QA / errors → [skill:seedance-troubleshoot]