Question 1

What resolutions does Seedance 1.5 Pro support?

Accepted Answer

Seedance 1.5 Pro offers three resolution tiers: 480p, 720p, and 1080p. Higher resolutions produce sharper, more detailed video but cost more credits. Pricing scales dynamically with pixel count — a 480p video costs roughly a quarter of a 1080p video at the same duration and aspect ratio.

Question 2

How long can videos be?

Accepted Answer

Videos can be generated from 4 to 12 seconds in length, with per-second granularity. Unlike models that only offer fixed 5s or 10s lengths, Seedance 1.5 Pro lets you set any duration between 4 and 12 seconds — pay only for the length you need.

Question 3

Does Seedance 1.5 Pro generate audio?

Accepted Answer

Yes. Audio and video are generated together in the same inference pass through a Dual-Branch Diffusion Transformer. The output includes layered sound: spoken dialogue with phoneme-level lip-sync in 8+ languages, context-aware foley effects, and environmental ambience, mixed and balanced automatically.

Question 4

Can I control the start and end frames?

Accepted Answer

Yes. You can provide a starting image and a separate ending image. The model interpolates between them, which is useful for creating controlled transitions — for example, a character walking from point A to point B, or a product rotating from front view to side view.

Question 5

What is the 21:9 aspect ratio used for?

Accepted Answer

21:9 is the ultrawide cinematic format used in feature films and movie trailers. Seedance 1.5 Pro is one of the few AI video generators that supports it. It is also useful for ultrawide monitor wallpapers and multi-screen display content.

Question 6

Does Seedance 1.5 Pro support multi-shot videos?

Accepted Answer

No. Multi-shot storytelling with camera cuts and persistent character identity is a Seedance 2.0 feature. Seedance 1.5 Pro generates single continuous shots. For connected multi-shot sequences, use Seedance 2.0.

Question 7

When should I choose Seedance 1.5 Pro over Seedance 2.0?

Accepted Answer

Choose 1.5 Pro when you need granular control over resolution and duration (480p-1080p, 4-12s), want to minimize cost on lower-resolution drafts, need the 21:9 ultrawide format, or want per-second duration control. Choose 2.0 when you need multi-shot storytelling, 2K output, character consistency across shots, or quad-modal input (text + image + video + audio).

Seedance 1.5 Pro — Lip-Sync AI Video in 8+ Languages

Seedance 1.5 Pro: Joint Audio-Video Generation with Lip-Sync in 8+ Languages

テキストから動画

画像から動画

ネイティブオーディオ生成

多言語リップシンク

From Prompt to Lip-Synced Video

Enter Your Content

Choose Language & Lip-Sync

Generate Video with Audio

What Seedance 1.5 Pro Offers

最大1080p解像度

柔軟な再生時間

複数のアスペクト比

カメラ制御

シード制御

終了画像対応

Seedance 1.5 Pro 動画サンプル

よくある質問

Lip-Sync in Any Language

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