Seedance 2.0 — AI Video by ByteDance

Generate AI videos using ByteDance's Seedance 1.5 Pro — a native audio-visual joint generation model with cinematic camera control, multi-language lip-sync,...

Security Scan

The skill is internally consistent with its stated purpose (video generation via Atlas Cloud) and only requests the Atlas Cloud API key; minor copy-paste inconsistencies exist but no signs of credential exfiltration or unexpected endpoints.

Purpose & Capability

The name/description (Seedance by ByteDance) aligns with a video-generation skill that calls api.atlascloud.ai. The script and SKILL.md both target Atlas Cloud model endpoints and require only ATLASCLOUD_API_KEY. Minor inconsistency: commented usage in scripts/generate_video.py shows example model IDs like alibaba/wan-2.6, while SKILL.md references bytedance/seedance-v1.5-pro — likely copy/paste but worth checking that the intended model IDs are available on Atlas Cloud.

Instruction Scope

SKILL.md and the script instruct only to send prompts, image URLs, and optionally upload local media to api.atlascloud.ai. The script reads only ATLASCLOUD_API_KEY from the environment and does not reference other system files, secrets, or unexpected remote endpoints. Uploads of local files require user confirmation by default.

Install Mechanism

No install spec — instruction-only plus a single Python script that uses only the standard library. Nothing is downloaded or executed from unknown remote URLs during install.

Credentials

Only ATLASCLOUD_API_KEY is declared and used; the script sends it in Authorization header to api.atlascloud.ai. This is proportionate for a cloud API client. The skill does not request unrelated credentials or config paths.

Persistence & Privilege

always is false and the skill does not request persistent system-level privileges. The skill does not modify other skills or system-wide settings.

Scan Findings in Context

[no-findings] expected: Static pre-scan reported no injection signals. The script performs network calls to api.atlascloud.ai and reads ATLASCLOUD_API_KEY, which is expected for this purpose.

Assessment

This skill appears to do what it claims: it sends prompts/images to api.atlascloud.ai and downloads generated videos, and it requires only your Atlas Cloud API key. Before installation: (1) Verify you trust https://www.atlascloud.ai and that your API key is created with appropriate billing/quotas — generation may incur charges. (2) Inspect the script if you plan to run it locally; the example model IDs in the script (alibaba/wan-2.6) differ from the SKILL.md (bytedance/seedance-v1.5-pro), so confirm the correct model ID you want to use. (3) Be cautious when using the upload command — it will upload local media to Atlas Cloud (the script prompts for confirmation by default). If any additional environment variables or unusual endpoints appear in future versions, treat that as a red flag.

Seedance — AI Video Generation by ByteDance

Generate AI videos with synchronized audio using ByteDance's Seedance 1.5 Pro — featuring native audio-visual joint generation, cinematic camera control, multi-language lip-sync, and diverse sound effects.

Seedance excels at creating cinematic short clips with realistic motion, facial expressions, spatial audio, and complex camera movements.

Data usage note: This skill sends text prompts and image URLs to the Atlas Cloud API (api.atlascloud.ai) for video generation. No data is stored locally beyond the downloaded output files. API usage incurs charges based on the model selected.

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Key Capabilities

• Text-to-Video — Generate video clips from text descriptions with synchronized audio
• Image-to-Video — Animate still images into dynamic video with motion and audio
• Native Audio Generation — Dialogue, sound effects, and music generated jointly with video (not post-processed)
• Multi-Language Lip-Sync — English, Chinese (including dialects), Japanese, Korean, Portuguese, Spanish, Indonesian
• Cinematic Camera Control — Dolly-in, snap zoom, first-person POV, tripod lock, crane shots
• Multiple Styles — Realistic, anime, 2D animation, steampunk, ink-wash, and more
• Resolution — Up to 720p (Pro), 480p available
• Duration — 5-12 seconds per clip

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Setup

1. Sign up at https://www.atlascloud.ai
2. Console → API Keys → Create new key
3. Set env: export ATLASCLOUD_API_KEY="your-key"

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Script Usage

This skill includes a Python script for video generation. Zero external dependencies required.

List available video models

python scripts/generate_video.py list-models

Generate a video

python scripts/generate_video.py generate \
  --model "bytedance/seedance-v1.5-pro/text-to-video" \
  --prompt "Your prompt" \
  --output ./output

Image-to-video

python scripts/generate_video.py generate \
  --model "bytedance/seedance-v1.5-pro/image-to-video" \
  --image "https://example.com/photo.jpg" \
  --prompt "Animate" \
  --output ./output

Run python scripts/generate_video.py generate --help for all options.

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Pricing

Model	Tier	Price	Resolution	Best For
bytedance/seedance-v1.5-pro/text-to-video	Pro	$0.222/video	Up to 720p	High-quality text-to-video
bytedance/seedance-v1.5-pro/image-to-video	Pro	$0.222/video	Up to 720p	Animate images to video
bytedance/seedance-v1.5-pro/text-to-video-fast	Fast	$0.018/video	720p	Quick drafts, prototyping
bytedance/seedance-v1.5-pro/image-to-video-fast	Fast	$0.018/video	720p	Quick image animation

Pro tier delivers higher quality with more detail and coherence. Fast tier is ~12x cheaper and suitable for drafts and iteration.

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Available Models

Text-to-Video

Model ID	Speed	Quality	Audio
bytedance/seedance-v1.5-pro/text-to-video	Standard (~30-60s)	High	Yes
bytedance/seedance-v1.5-pro/text-to-video-fast	Fast (~10-20s)	Good	Yes

Image-to-Video

Model ID	Speed	Quality	Audio
bytedance/seedance-v1.5-pro/image-to-video	Standard (~30-60s)	High	Yes
bytedance/seedance-v1.5-pro/image-to-video-fast	Fast (~10-20s)	Good	Yes

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Parameters

Text-to-Video

Parameter	Type	Required	Default	Options
prompt	string	Yes	-	Video description
aspect_ratio	string	No	16:9	21:9, 16:9, 4:3, 1:1, 3:4, 9:16
duration	integer	No	5	5-12 seconds
resolution	string	No	720p	720p, 480p (Pro); 720p (Fast)
generate_audio	boolean	No	true	Generate synchronized audio
camera_fixed	boolean	No	false	Lock camera position (tripod mode)
seed	integer	No	-1 (random)	For reproducible results

Image-to-Video

Same as text-to-video, plus:

Parameter	Type	Required	Description
image	string	Yes	URL of the source image to animate
last_image	string	No	URL of the target end frame (for guided motion)
prompt	string	No	Optional text describing desired motion/action

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Workflow: Submit → Poll → Download

Text-to-Video Example

# Step 1: Submit
curl -s -X POST "https://api.atlascloud.ai/api/v1/model/generateVideo" \
  -H "Authorization: Bearer $ATLASCLOUD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "bytedance/seedance-v1.5-pro/text-to-video",
    "prompt": "A woman walks through a sunlit bamboo forest, camera slowly dollying forward. Birds chirping in the background, gentle wind rustling leaves.",
    "aspect_ratio": "16:9",
    "duration": 5,
    "resolution": "720p",
    "generate_audio": true
  }'
# Returns: { "code": 200, "data": { "id": "prediction-id" } }

# Step 2: Poll (every 5 seconds until "completed" or "succeeded")
curl -s "https://api.atlascloud.ai/api/v1/model/prediction/{prediction-id}" \
  -H "Authorization: Bearer $ATLASCLOUD_API_KEY"
# Returns: { "code": 200, "data": { "status": "completed", "outputs": ["https://...video-url..."] } }

# Step 3: Download
curl -o output.mp4 "VIDEO_URL_FROM_OUTPUTS"

Image-to-Video Example

curl -s -X POST "https://api.atlascloud.ai/api/v1/model/generateVideo" \
  -H "Authorization: Bearer $ATLASCLOUD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "bytedance/seedance-v1.5-pro/image-to-video",
    "image": "https://example.com/portrait.jpg",
    "prompt": "The person slowly turns their head and smiles, camera gently zooms in",
    "aspect_ratio": "9:16",
    "duration": 5,
    "generate_audio": true
  }'

Fast Model Example (Quick Draft)

curl -s -X POST "https://api.atlascloud.ai/api/v1/model/generateVideo" \
  -H "Authorization: Bearer $ATLASCLOUD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "bytedance/seedance-v1.5-pro/text-to-video-fast",
    "prompt": "Ocean waves crashing on a rocky shore at sunset, seagulls flying overhead",
    "aspect_ratio": "16:9",
    "duration": 5,
    "generate_audio": true
  }'

Polling Logic

• processing / starting / running → wait 5s, retry (Pro takes ~30-60s, Fast takes ~10-20s)
• completed / succeeded → done, get URL from data.outputs[]
• failed → error, read data.error

Atlas Cloud MCP Tools (if available)

If the Atlas Cloud MCP server is configured, use built-in tools:

atlas_quick_generate(model_keyword="seedance 1.5", type="Video", prompt="...")
atlas_generate_video(model="bytedance/seedance-v1.5-pro/text-to-video", params={...})
atlas_get_prediction(prediction_id="...")

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Implementation Guide

1. Determine task type:

   • Text-to-video: user describes a scene/action in text
   • Image-to-video: user provides an image to animate

2. Choose model:

   • Pro for final output, client-facing content, or quality-critical use
   • Fast for quick iteration, drafts, or budget-conscious use

3. Extract parameters:

   • Prompt: describe scene, action, camera movement, and audio cues
   • Aspect ratio: infer from context (social reel→9:16, YouTube→16:9, square→1:1, cinematic→21:9)
   • Duration: default 5s, up to 12s for longer scenes
   • Audio: enabled by default; disable with generate_audio: false if user only wants silent video
   • Camera: set camera_fixed: true for static/tripod shots

4. Execute: POST to generateVideo API → poll result → download MP4

5. Present result: show file path, offer to play

Prompt Tips

Seedance produces best results when prompts describe both visual and audio elements:

• Scene + Action: "A chef flips a pancake in a busy kitchen, sizzling sounds and clattering pans"
• Camera direction: "Camera slowly pans left to reveal...", "Close-up tracking shot of...", "First-person POV walking through..."
• Audio cues: Include sound descriptions — "birds chirping", "rain on window", "jazz music playing softly"
• Dialogue: For talking videos, include speech in quotes — "The narrator says: 'Welcome to our city'"
• Style: "cinematic", "anime style", "documentary", "slow motion", "timelapse"
• Lip-sync: For multi-language dialogue, specify the language — "A woman speaking Japanese says: 'こんにちは'"

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Coming Soon: Seedance 2.0

Seedance 2.0 is ByteDance's next-generation unified multimodal video generation system, currently in preview. When available on Atlas Cloud, this skill will be upgraded with:

• Higher resolution — Expected support for 1080p and above
• Longer duration — Extended video length beyond 12 seconds
• Multimodal references — Video-to-video, audio-guided generation
• Director-level control — Fine-grained manipulation of performance, lighting, shadow, and camera
• Enhanced motion stability — Improved realism and coherence across longer clips

The API workflow and parameter structure are expected to remain compatible. Model IDs will be updated when Seedance 2.0 becomes available — no configuration changes needed on your end.