Seedance 2.0 Fast Text to Video

Frequently Asked Questions

When should I choose Seedance 2.0 Fast over the standard version?

Choose Fast when you need quick turnaround — drafting storyboards, testing prompt variations, or producing high-volume social media clips. The standard Seedance 2.0 is better for final deliverables where maximum visual fidelity matters. A common workflow: iterate with Fast at 5 seconds, then re-generate the winning concept on standard at full duration.

What prompt structure produces the best results?

Structure prompts in three layers: (1) Subject and action — 'A woman in a red dress walks along a pier'; (2) Camera and movement — 'slow dolly-in tracking her from behind'; (3) Atmosphere — 'golden hour, soft lens flare, cinematic color grading.' Prompts between 30–150 words hit the sweet spot. Avoid vague terms like 'nice' or 'cool' — the model responds to specific, visual language.

How does the built-in audio generation work?

Seedance 2.0 Fast generates ambient audio synchronized to the visual content in a single pass — footsteps match walking motion, wind sounds align with outdoor scenes, etc. This is not a separate TTS or music layer; it's contextual sound design baked into the model architecture. The audio quality is best for ambient/environmental scenes; for dialogue or music-driven content, consider adding a dedicated audio track in post.

What are the actual generation times I should expect?

Typical inference times: ~60–90 seconds for 5-second clips, ~120–180 seconds for 10-second clips, and ~180–300 seconds for 15-second clips. These vary with server load. The Fast variant is roughly 2× quicker than the standard Seedance 2.0 for the same duration.

Can I control camera movement through the prompt?

Yes. The model understands cinematographic directions: 'slow pan left', 'aerial drone shot rising', 'handheld close-up with shallow depth of field', 'static wide shot.' Combining camera language with scene description gives you director-level control. If camera movement is unwanted, describe a 'locked-off static shot' explicitly.

What are the output specs and how can I use the videos commercially?

Output is MP4 (H.264) with synchronized audio, up to 15 seconds. Aspect ratios: 16:9, 9:16, 4:3, or 3:4. Videos are watermark-free. Commercial usage follows ByteDance's Seedance model terms of service — suitable for ads, social media, presentations, and creative projects. Always verify compliance with your specific use case.