Seedance 1.5 Pro Video Generator: AI Video With Built-In Audio
The Seedance 1.5 Pro video generator creates dialogue, sound effects, and music alongside the video in a single generation pass. Write a scene with dialogue. Get a finished clip with voices, lip-sync, ambient sound, and background music. No audio editing. No syncing.
Audio and Video Generated Together. Not Stitched After.
Seedance 1.5 Pro produces character dialogue, sound effects, ambient audio, and background music in the same pass as the video frames. Lip movements match the words. Footsteps match the walking. No syncing timeline needed.
ByteDance built a dual-branch architecture that creates pixels and audio waveforms simultaneously. The sounds are not matched to the video after the fact — they are born with it. Creators who switched from tools like Runway or Kling say Seedance 1.5 Pro cuts their per-clip time in half because post-production audio work stops existing.
Upload Two Photos. Get Real Motion Between Them.
Upload a start image and an end image. Seedance 1.5 Pro creates actual physical motion connecting the two frames. Not a crossfade or a morph. Objects move, scenes change, characters transform. Audio is generated for the transition too.
Dual-image transition is a mode most AI video tools do not have. It works for product unboxings, renovation reveals, fitness transformations, logo redesigns — anything with a clear start and end state. Upload your two reference images, describe what should happen in between, and Seedance 1.5 Pro fills the gap with motion and sound.
Lip-Sync in 9 Languages — Down to the Dialect Level
Seedance 1.5 Pro maps lip movements to each language's specific phonemes. Cantonese final consonants look different from Mandarin ones, and the mouth shapes reflect that. Not dubbed audio pasted on top — native speech with matched lip-sync.
Nine languages and dialects supported: English, Mandarin, Cantonese, Sichuan dialect, Japanese, Korean, Spanish, Portuguese, and Indonesian. Multi-speaker scenes work too — two characters can converse in different languages, each with distinct voices and accurate lip-sync for their language.
1080p Full HD. Up to 12 Seconds. 21:9 Ultra Wide.
Most AI video generators cap at 720p and 5 seconds. Seedance 1.5 Pro outputs at up to 1080p resolution, clips up to 12 seconds, and six aspect ratios including cinematic 21:9 ultra wide.
Choose 16:9 for YouTube, 9:16 for TikTok and Reels, 1:1 for Instagram, 4:3 for presentations, 3:4 for Pinterest, or 21:9 for cinematic content. Resolution and aspect ratio are set before generation. Download and post — no resizing, no cropping, no letterboxing. Audio is already inside.
What Makes Seedance 1.5 Pro Different
Most AI video generators produce visuals only. Seedance 1.5 Pro creates audio and video from the same model at the same time. Six things that matter in practice.
Native Audio-Visual Generation
Dialogue with lip-sync, sound effects matched to action, ambient audio, and background music. Seedance 1.5 Pro creates everything in one pass. No audio post-production needed.
Dual-Image Transitions
Upload a start and end image. Seedance 1.5 Pro produces smooth motion between them with matching audio. Not a crossfade — real animated movement.
Dialect-Level Lip-Sync
Nine languages including Cantonese and Sichuan dialect. Mouth movements match the specific phonemes of each language, not a generic approximation.
Multi-Speaker Conversations
Two characters talking in the same scene with distinct voices and separate lip movements. Each speaker stays consistent throughout the clip.
1080p and 21:9 Ultra Wide
Full HD output and cinematic ultra wide aspect ratio. Six format options covering every major platform. No cropping or letterboxing needed.
Free Credits on Signup
Test Seedance 1.5 Pro with your own prompts. No credit card required. Enough credits to generate multiple clips and see the results.
How to Create Video With Seedance 1.5 Pro
One prompt. Video with dialogue, effects, and music.
Describe the Scene or Upload Photos
Type what happens, including any dialogue. Or upload one image to animate, or two images for a dual-image transition. Seedance 1.5 Pro handles text-to-video and image-to-video.
Choose Duration, Resolution, and Format
Duration: 4, 8, or 12 seconds. Resolution: 480p, 720p, or 1080p. Aspect ratio: 16:9, 9:16, 1:1, 4:3, 3:4, or 21:9. Toggle audio generation on. Hit generate.
Preview and Download
Watch the clip with its audio. Download as MP4 or adjust the prompt and regenerate. Seedance 1.5 Pro makes iteration fast.
Seedance 1.5 Pro FAQ
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Your Next Video Comes With Sound
Dialogue, lip-sync, sound effects, dual-image transitions, 1080p, ultra wide. All from one prompt. The Seedance 1.5 Pro video generator handles it. Free credits on signup, no credit card.
Try Seedance 1.5 Pro Free