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SKILL.md
npx skills add inference-sh/skills --skill seedance
Generate videos with ByteDance Seedance 2.0 via inference.sh CLI. Unified model for text-to-video, image-to-video, and reference-to-video with synchronized audio, up to 1080p, 4-15s duration. Pro and Fast variants. Studio variants with private asset library for portrait consistency. Use for: social media videos, music videos, product demos, animated content, AI video with sound. Triggers: seedance, seedance 2, bytedance video, seedance t2v, seedance i2v, seedance r2v, video with audio, seedance 2.0, bytedance seedance, seedance studio
npx skills add inference-sh/skills --skill seedance
Install the belt CLI skill:
npx skills add belt-sh/cli
Generate videos with synchronized audio using ByteDance's Seedance 2.0 via inference.sh CLI.
Requires inference.sh CLI (
belt). Install instructions
| Model | App ID | Best For |
|---|---|---|
| Seedance 2.0 | bytedance/seedance-2-0 | Best quality, up to 1080p |
| Seedance 2.0 Fast | bytedance/seedance-2-0-fast | Faster generation, up to 720p |
| Seedance 2.0 Studio | bytedance/seedance-2-0-studio | Quality + private asset library for portrait consistency |
| Seedance 2.0 Studio Fast | bytedance/seedance-2-0-studio-fast | Fast + private asset library for portrait consistency |
All models support text-to-video, image-to-video, multimodal reference-to-video, and synchronized audio generation. Studio variants automatically upload reference images to the BytePlus private virtual portrait library for enhanced character consistency - particularly useful for faces and branded characters.
The model determines the generation mode from your inputs. These modes are mutually exclusive - use either first-frame/last-frame OR reference inputs, not both.
| Mode | Inputs | Description |
|---|---|---|
| Text-to-Video | prompt only | Generate video from text description |
| Image-to-Video | prompt + image | Animate a still image (first frame) |
| First+Last Frame | prompt + image + end_image | Control start and end frames |
| Multimodal Reference | prompt + reference_images/reference_videos/reference_audios | Guide generation with reference material |
Animate a still image into a video:
Use multiple reference images to guide character appearance, outfits, and scene elements:
Studio variants upload images to BytePlus's private asset library for enhanced face/character consistency:
Reference assets in your prompt using type + index: Image 1, Image 2, Video 1, Audio 1. The index is the position within that type in the arrays you provide. Do NOT use asset IDs in prompts.
Multimodal reference formula:
Video editing formula:
Video extension formula:
| Parameter | Type | Default | Description |
|---|---|---|---|
prompt | string | required | Text description of the video |
generate_audio | boolean | true | Generate synchronized audio |
duration | integer | 5 | Duration in seconds (4-15), or -1 for auto |
ratio | enum | adaptive | 21:9, 16:9, 4:3, 1:1, 3:4, 9:16, or adaptive |
resolution | enum | 720p | 480p, 720p, 1080p (Fast: 480p, 720p only) |
seed | integer | -1 | Seed for reproducibility (-1 for random) |
watermark | boolean | false | Add watermark to output |
safety_identifier | string | - | Unique end-user identifier for safety policy (max 64 chars, hash of user ID recommended) |
image | file | - | First-frame image (mutually exclusive with reference inputs) |
end_image | file | - | Last-frame image (requires image) |
reference_images | file[] | - | Reference images, up to 9 (mutually exclusive with image/end_image) |
reference_videos | file[] | - | Reference videos, up to 3. Max 15s each, total max 15s. mp4/mov |
reference_audios | file[] | - | Reference audios, up to 3. Max 15s each, total max 15s. wav/mp3. Requires at least one image or video |
| Model | Pricing |
|---|---|
| Seedance 2.0 | $4.30-$7.70/M tokens (varies by resolution and input type) |
| Seedance 2.0 Fast | $3.30-$5.60/M tokens |
Token formula: (width x height x fps x duration) / 1024
Browse all video apps: belt app list --category video
belt app run bytedance/seedance-2-0 --input '{
"prompt": "ocean waves crashing on rocks during a storm, dramatic cinematic shot",
"generate_audio": true,
"duration": 10,
"ratio": "16:9"
}'belt app run bytedance/seedance-2-0-fast --input '{
"prompt": "a butterfly landing on a flower in slow motion",
"generate_audio": true
}'belt app run bytedance/seedance-2-0 --input '{
"image": "https://your-image.jpg",
"prompt": "gentle camera movement, leaves rustling in the wind",
"generate_audio": true
}'belt app run bytedance/seedance-2-0 --input '{
"image": "https://start-frame.jpg",
"end_image": "https://end-frame.jpg",
"prompt": "smooth transition between scenes",
"generate_audio": true
}'belt app run bytedance/seedance-2-0 --input '{
"prompt": "The girl from Image 1 wearing the outfit from Image 2 walks through the cafe from Image 3",
"reference_images": [
"https://character-portrait.jpg",
"https://outfit-reference.jpg",
"https://cafe-scene.jpg"
],
"generate_audio": true,
"duration": 8
}'belt app run bytedance/seedance-2-0 --input '{
"prompt": "Replace the perfume in Video 1 with the face cream from Image 1, preserving all original motions and camera work",
"reference_images": ["https://face-cream.jpg"],
"reference_videos": ["https://original-video.mp4"],
"generate_audio": true
}'belt app run bytedance/seedance-2-0 --input '{
"prompt": "Video 1 transitions smoothly into Video 2, then the camera enters the painting from Video 3",
"reference_videos": [
"https://clip1.mp4",
"https://clip2.mp4",
"https://clip3.mp4"
],
"generate_audio": true,
"duration": 8
}'belt app run bytedance/seedance-2-0 --input '{
"prompt": "The musician from Image 1 performs the song from Audio 1, voice style referenced from Audio 1",
"reference_images": ["https://musician.jpg"],
"reference_audios": ["https://music.mp3"],
"generate_audio": true
}'belt app run bytedance/seedance-2-0-studio --input '{
"prompt": "The person in Image 1 smiles at the camera, golden hour lighting, cinematic",
"reference_images": ["https://portrait.jpg"],
"safety_identifier": "user-abc123",
"generate_audio": true
}'belt app run bytedance/seedance-2-0 --input '{
"prompt": "First-person POV product ad. Opening frame is Image 1, hand picks up the product. Camera pushes into close-up showing details. Use the camera movement style from Video 1. Background music from Audio 1.",
"reference_images": ["https://product-hero.jpg", "https://product-detail.jpg"],
"reference_videos": ["https://camera-style.mp4"],
"reference_audios": ["https://bgm.mp3"],
"generate_audio": true,
"ratio": "9:16",
"duration": 11
}'belt app search "seedance"# Full platform skill (all apps)
npx skills add inference-sh/skills@infsh-cli
# All video generation models
npx skills add inference-sh/skills@ai-video-generation
# Google Veo
npx skills add inference-sh/skills@google-veo
# Image generation (for image-to-video)
npx skills add inference-sh/skills@ai-image-generation
# AI avatars & lipsync
npx skills add inference-sh/skills@ai-avatar-video