Seedance 2.5 AI Video Generator
Direct up to 30 seconds of 480p/720p video with ByteDance Seedance 2.5 — second-by-second timestamp control, up to 50 image, video and audio references, and dialogue, sound effects and ambience generated in sync, all in one click on HeyMarmot.
Optional: mix up to 50 image, video and audio references, then map each one to a role in your prompt.
See Seedance 2.5 in motion
Real HeyMarmot creations: a directed prompt plus references become a consistent, sound-synced Seedance 2.5 shot.
Prompt
镜头1：开场即激战·武器对撞 雾山五行正统国漫画风，锐利硬边水墨线条，高对比红黑色调。 开场无铺垫，两名侠客持武器正面硬撼，刀剑/长兵激烈碰撞，火花与墨色气浪同时爆发。 动作迅猛狠辣，力量感均等，势均力敌，各有千秋。 运镜：低角度高速跟拍，镜头微震，打击特写，雾山五行同款节奏运镜。 镜头2：高速攻防·招式互换 雾山五行式极致流畅打斗，两人残影叠影，武器交错斩击、格挡、反击，招招致命。一人刚猛爆裂，一人灵动迅捷，风格完全不同却实力相当。墨气流、速度线、动态模糊拉满，打击感炸裂。 运镜：环绕旋转运镜，快速切镜，丝滑跟焦，强光影对比。 镜头3：武器连击·近身搏杀 双方放弃距离，贴身武器搏杀，劈、砍、刺、挑、砸连招爆发，击中瞬间爆发冲击波，地面崩裂、烟尘飞溅。两人攻防节奏完美制衡，谁也不压谁，打斗张力拉满。 运镜：慢动作特写打击瞬间，超广角镜头，镜头震动反馈。 镜头4：大招对轰·气场平分秋色 两人同时爆发全力，武器灌注墨色罡气/焰光，正面全力对轰，能量冲击波炸开，天地震动。画风狂放，气势史诗，双方气场完全对等，各有千秋，压迫感拉满。 运镜：史诗级仰视全景，逆光剪影，电影级大景深构图。 镜头5：僵持定格·势均力敌 战斗骤停，武器相抵，两人对峙而立，气息激荡，烟尘弥漫。眼神冷峻，势均力敌，胜负未分，留白感极强。 运镜：中景慢推定格，雾山五行高级动画质感。 全局通用强化词（每段必加） 雾山五行动画级别画风，极致凌厉线条，武器激烈打斗，拳拳到肉，打击感超强，势均力敌，各有千秋，高燃打斗。
Seedance 2.5 vs other top AI video models
Switch between Seedance 2.5, Seedance 2.0, Veo 3.1, Sora 2, Kling 3.0 and more in one workspace — pick the right engine for every shot.
A 30-second film, directed second by second
Seedance 2.5 reads timestamps at one-second resolution, so you can script every beat — action, camera move, line of dialogue and sound — and get a coherent long take instead of a lucky four-second clip.
Three steps to a Seedance 2.5 video
From prompt to final cut, Seedance 2.5 is just three steps away.
Describe & map references
Write your prompt, add images, video or audio, then say in the text which reference is which.
Pick Seedance 2.5 & settings
Select Seedance 2.5, then tune duration up to 30s, resolution and aspect ratio.
Generate and iterate
Preview the result, download, or refine the timeline and rerun in the same thread.
Seedance 2.5 and other supported video models
Toggle Seedance 2.5, Seedance 2.0, Veo 3.1, Kling 3.0 and more without leaving HeyMarmot — one workspace, no extra subscriptions.
Seedance 2.5
Supported in the HeyMarmot video workspace.
Seedance 2.0
Supported in the HeyMarmot video workspace.
Veo 3.1
Supported in the HeyMarmot video workspace.
Sora 2
Supported in the HeyMarmot video workspace.
Kling 3.0
Supported in the HeyMarmot video workspace.
Seedance 1.5 Pro
Supported in the HeyMarmot video workspace.
Wan AI
Supported in the HeyMarmot video workspace.
Seedance 2.5 video use cases
Turn scripts, photos and footage into finished motion content for storytelling, social, ecommerce and paid ads — with sound already in the cut.
Short films & narrative scenes
Script a full 30-second story with timestamped beats, multi-shot camera work and characters that stay consistent throughout.
Social & short-form video
Turn prompts, photos and clips into vertical Reels, TikTok and Shorts with native audio baked in.
Product & ad creatives
Animate product shots into push-ins, parallax and ambient motion, with clean ambient sound and no music bed when you need it.
Reference-driven remix & editing
Feed existing footage and audio as references, then edit, extend or restyle them with plain-language instructions.
A studio built for directing Seedance 2.5
HeyMarmot unifies reference assets, timeline prompting, model controls and history so iterating on a long take stays fluid.
Multimodal prompting
Combine text with up to 50 images, videos and audio tracks, and bind each reference to a character, motion or voice.
Second-by-second timeline
Write timestamped beats like 0-3s and 3-8s so Seedance 2.5 paces the shot exactly the way you planned.
First & last frame
Anchor the opening and closing frames to lock the shape of the whole shot.
Edit, extend & restyle
Say add, remove, replace or extend, and Seedance 2.5 reworks an existing clip instead of starting over.
Reusable asset library
Save inputs and Seedance outputs to remix later without re-uploading.
Conversation history
Prompts, references and Seedance outputs all live in one creative thread.
Seedance 2.5 FAQ
Answers for creators directing long-form multimodal AI video with Seedance 2.5.
What is Seedance 2.5?
Seedance 2.5 is ByteDance's multimodal video model. It generates up to 30 seconds of video with synchronized audio, follows second-level timestamps, and accepts image, video and audio references as creative direction.
How is Seedance 2.5 different from Seedance 2.0?
Three things: clips run up to 30 seconds instead of a few, timing is controlled by real timestamps rather than shot numbers, and a single job can reference up to 50 files across images, video and audio.
What inputs does Seedance 2.5 support?
Text prompts plus optional references: up to 30 images, 10 videos and 10 audio tracks, capped at 50 files per generation. Reference video and audio should run 2 to 30 seconds.
What resolution and duration does Seedance 2.5 support?
480p and 720p, with durations from 4 to 30 seconds and aspect ratios from 21:9 to 9:16.
Does Seedance 2.5 generate sound?
Yes. Dialogue, sound effects and ambience are generated in sync with the picture, and you can ask for ambient sound only, no music, or no audio at all.
Is there a free Seedance 2.5 trial?
Yes. New HeyMarmot accounts include starter credits so you can try Seedance 2.5 before upgrading.
Explore more AI video resources
See Seedance inspirations, check pricing, or read the Seedance 2.5 prompting guide.