Question 1

How does Seedance 2.1 differ from Seedance 1.5 Pro?

Accepted Answer

Seedance 2.1 delivers improved temporal consistency, more accurate motion from prompts, and higher perceptual quality. It handles complex scenes with better subject preservation and smoother frame transitions.

Question 2

Can I control the start and end frames?

Accepted Answer

Yes. Provide both `image_url` (start frame) and `last_image` (end frame) to enable first-last frame mode, giving you precise control over the video's opening and closing compositions.

Question 3

What resolution options are available?

Accepted Answer

Seedance 2.1 supports 480p, 720p, and 1080p output resolutions.

Question 4

Is audio generated automatically?

Accepted Answer

Audio generation is optional. Set `generate_audio` to true to produce ambient or scene-matched audio alongside the video.