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seedance-2-5

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Updated 10-16 08:09

About this skill

ByteDance Seedance 2.5 Video

Generate next-generation audio-visual video with extended duration through Frevana's OpenRouter video endpoint using bytedance/seedance-2.5.

Model Characteristics

  • Model ID: bytedance/seedance-2.5 (variant: bytedance/seedance-1-5-pro)
  • Resolutions: Seedance 2.5 supports 480p and 720p (default); Seedance 1.5 Pro also supports 1080p
  • Aspect Ratios: 16:9 (default), 4:3, 1:1, 3:4, 9:16, 21:9; Seedance 1.5 Pro also supports 9:21
  • Durations: Seedance 2.5 supports 4 to 30 seconds; Seedance 1.5 Pro supports 4 to 12 seconds (default: 5)
  • Frame Control: Supports both first_frame and last_frame (image-to-video)
  • Input References: Seedance 2.5 supports reference images, audio, and video; Seedance 1.5 Pro supports reference images only
  • 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-2-5/scripts/generate_video.sh \
  --prompt "An epic sci-fi spaceship journey through a crystalline nebula with intense synchronized audio" \
  --duration 10 \
  --resolution 720p \
  --aspect-ratio 16:9 \
  --download-dir ./output

# Image-to-video with first frame
bash skills/seedance-2-5/scripts/generate_video.sh \
  --prompt "The character starts speaking with natural facial expressions" \
  --first-frame ./portrait.jpg \
  --duration 6 \
  --download-dir ./output

# Status check
bash skills/seedance-2-5/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-2.5, allowed: bytedance/seedance-2.5, bytedance/seedance-1-5-pro)
  • --duration SEC: Seedance 2.5: 4-30; Seedance 1.5 Pro: 4-12 (default: 5)
  • --aspect-ratio RATIO: 16:9, 4:3, 1:1, 3:4, 9:16, 21:9; Seedance 1.5 Pro also accepts 9:21 (default: 16:9)
  • --resolution RES: Seedance 2.5: 480p, 720p; Seedance 1.5 Pro also accepts 1080p (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 for both models
  • --reference-audio URL: Add a reference audio URL for Seedance 2.5; rejected for Seedance 1.5 Pro
  • --reference-video URL: Add a reference video URL for Seedance 2.5; rejected for Seedance 1.5 Pro
  • --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 "720p landscape" or "vertical video", 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 duration, resolution, and aspect ratio against the selected model.
  • --size is format-checked locally but not matched against a static model allowlist; model/provider compatibility is validated by the API.
  • Seedance 2.5 accepts 4-30 seconds at 480p/720p; Seedance 1.5 Pro accepts 4-12 seconds, adds 1080p and 9:21.
  • Frame images and input references may be sent together; OpenRouter gives frameImages precedence and treats the request as image-to-video.