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Skillsseedance-2-0

seedance-2-0

Design & creation

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Updated 10-15 21:41

About this skill

ByteDance Seedance 2.0 Video

Generate character-consistent video with synchronized audio through Frevana's OpenRouter video endpoint using bytedance/seedance-2.0.

Model Characteristics

  • Model ID: bytedance/seedance-2.0 (variants: bytedance/seedance-2.0-fast, bytedance/seedance-2.0-mini)
  • Resolutions: the base model supports 480p, 720p (default), 1080p, and 4K; Fast and Mini support only 480p and 720p
  • Aspect Ratios: 1:1, 3:4, 9:16, 4:3, 16:9 (default), 21:9, 9:21
  • Durations: 4 to 15 seconds (default: 5)
  • Frame Control: Supports both first_frame and last_frame (image-to-video)
  • Input References: Reference images, audio, and video (image_url, audio_url, video_url)
  • Audio: Synchronized audio generation supported (default: enabled)
  • Seed: Deterministic integer seed supported
  • Passthrough Controls: watermark

Prerequisites & Authentication

  • FREVANA_TOKEN (or --token) or FREVANA_API_KEY (or --api-key) in the environment
  • Optional FREVANA_AGENT_APP_INSTANCE_ID (or --agent-app-instance-id) sent as x-frevana-agent-app-instance-id
  • curl, bash, and python3

Invocation

# Text-to-video: submit and wait for video completion
bash skills/seedance-2-0/scripts/generate_video.sh \
  --prompt "A warrior meditating in a bamboo forest under falling leaves, cinematic 4K" \
  --duration 5 \
  --resolution 1080p \
  --aspect-ratio 16:9 \
  --download-dir ./output

# Image-to-video with first and last frame
bash skills/seedance-2-0/scripts/generate_video.sh \
  --prompt "The hero turns around and smiles confidently" \
  --first-frame ./first.jpg \
  --last-frame ./last.jpg \
  --duration 6 \
  --download-dir ./output

# Status check
bash skills/seedance-2-0/scripts/generate_video.sh status --job-id <JOB_ID>

Allowed Options

  • -p, --prompt TEXT: Text description of the video (required for create)
  • --prompt-file PATH: Path to file containing prompt
  • --model MODEL: Model slug (default: bytedance/seedance-2.0, allowed: bytedance/seedance-2.0, bytedance/seedance-2.0-fast, bytedance/seedance-2.0-mini)
  • --duration SEC: Duration in seconds (4-15, default: 5)
  • --aspect-ratio RATIO: 1:1, 3:4, 9:16, 4:3, 16:9, 21:9, 9:21 (default: 16:9)
  • --resolution RES: base model: 480p, 720p, 1080p, 4K; Fast/Mini: 480p, 720p (default: 720p)
  • --size WIDTHxHEIGHT: Exact output dimensions; overrides --resolution and --aspect-ratio
  • --first-frame, --image PATH/URL: Image path or URL for first frame
  • --last-frame PATH/URL: Image path or URL for last frame
  • --reference-image PATH/URL: Add a reference image; repeatable
  • --reference-audio URL: Add a reference audio URL; repeatable
  • --reference-video URL: Add a reference video URL; repeatable
  • --audio: Generate synchronized audio (default: true)
  • --no-audio: Disable audio generation
  • --seed INT: Deterministic integer seed for reproducible generation
  • --watermark: Enable watermark
  • --no-watermark: Disable watermark
  • --wait: Wait for job completion and download/output (default in CLI)
  • --no-wait: Submit job and return immediately with Job ID
  • --poll-interval SEC: Seconds between status checks (default: 10)
  • --max-wait SEC: Maximum seconds to wait before timeout (default: 600)
  • --download-dir DIR: Directory to download completed MP4 video
  • -o, --output FILE: Path to save output JSON or MP4 file
  • -t, --text-only: Output only the video URL or downloaded file path
  • --dry-run: Print request payload JSON and exit without network calls
  • --token TOKEN: Frevana Bearer token override
  • --api-key KEY: Frevana API key override
  • --agent-app-instance-id ID: Agent App instance ID override

Guardrails

  • For semantic requests such as "1080p landscape" or "720p vertical", use --resolution with --aspect-ratio.
  • Use --size only when the user explicitly requires exact WIDTHxHEIGHT pixels; it overrides and replaces both semantic dimension fields in the request payload.
  • Validate that --duration is between 4 and 15 seconds.
  • Validate resolution against the selected model; Fast and Mini reject 1080p and 4K.
  • --size is format-checked locally but not matched against a static model allowlist; model/provider compatibility is validated by the API.
  • Validate that --aspect-ratio is one of the supported 7 aspect ratios.
  • Frame images and input references may be sent together; OpenRouter gives frameImages precedence and treats the request as image-to-video.