Video models
Seedance 2.0
Seedance 2.0 — high-quality AI video generation.
| modelId | bytedance-seedance-2, bytedance-seedance-2-fast |
| Modality | video |
| Pricing | See this model on the Pricing page for the current per-call price (with your markup). |
Operations
| Operation | modelId | Endpoint | Required input |
|---|---|---|---|
| Seedance 2 | bytedance-seedance-2 | POST /api/v1/generate | — |
| Seedance 2 Fast | bytedance-seedance-2-fast | POST /api/v1/generate | — |
| Poll task | — | GET /api/v1/task/{id}?model=bytedance-seedance-2 | — |
Seedance 2 — bytedance-seedance-2
| Field | Type | Required | Values / example |
|---|---|---|---|
| first_frame_url | string | No | Click to upload or drag and drop images. JPG/PNG/WEBP/BMP/GIF, max 30MB each. (image URL) |
| last_frame_url | string | No | Click to upload or drag and drop images. JPG/PNG/WEBP/BMP/GIF, max 30MB each. (image URL) |
| prompt | string | No | The text prompt or description for the video. Max 20000 characters. (example: Create a **15-second epic anime fantasy trailer**, 16:9. Premium Japanese theatrical anime quality, fluid animation, cinematic lighting, detailed fantasy… — full value in the request example) |
| reference_image_urls | string[] | No | A list of input image URLs. (image URL) |
| reference_video_urls | string[] | No | A list of input video URLs. Furthermore, the total length of the three videos must not exceed 15 seconds. (image URL) |
| reference_audio_urls | string[] | No | A list of input audio URLs. Furthermore, the total length of the three audios must not exceed 15 seconds. (image URL) |
| generate_audio | boolean | No | Whether to generate AI audio synchronized with the video. (true/false) (default: true) |
| resolution | string | No | The output video resolution. (options: 480p | 720p | 1080p | 4k) (default: 720p) |
| aspect_ratio | string | No | The aspect ratio of the generated video. (options: 16:9 | 4:3 | 1:1 | 3:4 | 9:16 | 21:9) (default: 16:9) |
| duration | number | No | Video duration in seconds. (range 4-15) (default: 15) |
| nsfw_checker | boolean | No | A configurable parameter. Defaults to true in the Playground. (true/false) (default: true) |
bash
curl -X POST https://you.bot/api/v1/generate \
-H "Authorization: Bearer $YOUBOT_API_KEY" \
-H "Content-Type: application/json" \
-d '{"modelId":"bytedance-seedance-2","input":{"first_frame_url":"https://you.bot/examples/grok-imagine-text-to-image.jpg","last_frame_url":"https://you.bot/examples/grok-imagine-text-to-image.jpg","prompt":"Create a **15-second epic anime fantasy trailer**, 16:9.\n\nPremium Japanese theatrical anime quality, fluid animation, cinematic lighting, detailed fantasy environments, vibrant magical colors.\n\nA young adventurer with dark hair, a long navy cloak and leather armor carries a legendary glowing magic sword.\n\nKeep the adventurer visually consistent throughout.\n\n### 0–4s — MAGICAL WORLD HOOK\n\nExtreme close-up of the ancient magic sword embedded in a stone altar.\n\nBlue runes suddenly ignite across the blade.\n\nCamera rapidly pulls back to reveal a breathtaking enchanted forest filled with giant glowing mushrooms, bouncing translucent slimes and tiny golden fairies.\n\nThe adventurer grabs the sword and pulls it free.\n\nA wave of blue magical energy sweeps through the forest.\n\n### 4–8s — FANTASY KINGDOM\n\nClean cinematic cut.\n\nThe adventurer walks through an enormous fantasy city built between giant trees, cliffs and waterfalls.\n\nSmooth side-tracking camera.\n\nElves cross elegant bridges with bows.\n\nDwarves forge glowing weapons.\n\nOrcs carry huge axes through the market.\n\nFairies fly between lanterns.\n\nSlimes bounce around carts while strange crystal creatures roam the streets.\n\nThe world feels busy, magical and alive.\n\n### 8–11s — DARK THREAT\n\nA huge shadow suddenly falls across the kingdom.\n\nThe sky darkens unnaturally.\n\nWind surges through the streets.\n\nEveryone stops and looks toward the distant mountain.\n\nCamera tilts upward as black clouds swirl around a towering dark castle.\n\nA colossal **evil Demon Lord** appears on the highest cliff — massive black armor, a horned crown, glowing crimson eyes, and a giant corrupted sword radiating dark purple energy.\n\nThe adventurer draws the glowing magic sword.\n\nBlue-white energy erupts around the blade.\n\n### 11–15s — FINAL FACE-OFF\n\nHard cut to a dramatic cliffside battlefield above the kingdom.\n\nThe adventurer stands in the foreground, cape whipping in the wind.\n\nBehind him: elves raise glowing bows, dwarves lift enchanted hammers, orcs ready giant weapons, fairies gather golden magic, and slimes tremble nearby.\n\nAcross from them, the **evil Demon Lord** stands alone, towering and terrifying, wrapped in swirling dark energy and black-red lightning.\n\nThe hero and Demon Lord slowly step forward and stop, standing face-to-face in a powerful final confrontation.\n\nThe adventurer raises the glowing sword.\n\nThe Demon Lord lifts his corrupted blade.\n\nBlue magical light and dark purple energy collide between them, illuminating the cliffs, clouds, floating islands and the kingdom below.\n\nCamera rapidly pulls back to reveal the full scale of the battlefield.\n\nEnd on the hero and Demon Lord locked in an intense final stare.\n\nCut to black.\n\n**STYLE**\nHigh-end anime movie, crisp detailed line art, fluid hand-drawn motion, spectacular fantasy landscapes, dramatic clouds, luminous magic, blue-gold-green versus black-red-purple contrast, cinematic depth, powerful lighting and premium theatrical composition.\n\n**PRIORITY**\nBeautiful fantasy world-building, varied creatures, strong hero design, intimidating Demon Lord presence, spectacular magic effects and a dramatic final confrontation.\n\n**AVOID**\nCharacter duplication, malformed creatures, floating feet, stiff animation, chaotic camera movement, inconsistent character designs, excessive particles, subtitles, text, logos, watermark.","reference_image_urls":["https://you.bot/examples/grok-imagine-text-to-image.jpg"],"reference_video_urls":["https://you.bot/examples/gemini-omni.mp4"],"reference_audio_urls":["https://you.bot/examples/suno-v4-5.mp3"],"generate_audio":true,"resolution":"480p","aspect_ratio":"16:9","duration":6,"nsfw_checker":true}}'Seedance 2 Fast — bytedance-seedance-2-fast
| Field | Type | Required | Values / example |
|---|---|---|---|
| first_frame_url | string | No | Click to upload or drag and drop images. JPG/PNG/WEBP/BMP/GIF, max 30MB each. (image URL) |
| last_frame_url | string | No | Click to upload or drag and drop images. JPG/PNG/WEBP/BMP/GIF, max 30MB each. (image URL) |
| prompt | string | No | The text prompt or description for the video. Max 20000 characters. (example: Animate from the first frame with a gentle push-in as a tall waterfall's mist rises and drifts, faint rainbows shimmering in the spray while ferns tremble and… — full value in the request example) |
| reference_image_urls | string[] | No | A list of input image URLs. (image URL) |
| reference_video_urls | string[] | No | A list of input video URLs. Furthermore, the total length of the three videos must not exceed 15 seconds. (image URL) |
| reference_audio_urls | string[] | No | A list of input audio URLs. Furthermore, the total length of the three audios must not exceed 15 seconds. (image URL) |
| generate_audio | boolean | No | Whether to generate AI audio synchronized with the video. (true/false) (default: true) |
| resolution | string | No | The output video resolution. (options: 480p | 720p) (default: 720p) |
| aspect_ratio | string | No | The aspect ratio of the generated video. (options: 16:9 | 4:3 | 1:1 | 3:4 | 9:16 | 21:9) (default: 16:9) |
| duration | number | No | Video duration in seconds. (range 4-15) (default: 15) |
| nsfw_checker | boolean | No | A configurable parameter. Defaults to true in the Playground. (true/false) (default: true) |
bash
curl -X POST https://you.bot/api/v1/generate \
-H "Authorization: Bearer $YOUBOT_API_KEY" \
-H "Content-Type: application/json" \
-d '{"modelId":"bytedance-seedance-2-fast","input":{"first_frame_url":"https://you.bot/examples/grok-imagine-text-to-image.jpg","last_frame_url":"https://you.bot/examples/grok-imagine-text-to-image.jpg","prompt":"Animate from the first frame with a gentle push-in as a tall waterfall's mist rises and drifts, faint rainbows shimmering in the spray while ferns tremble and light dapples through the canopy.","reference_image_urls":["https://you.bot/examples/grok-imagine-text-to-image.jpg"],"reference_video_urls":["https://you.bot/examples/gemini-omni.mp4"],"reference_audio_urls":["https://you.bot/examples/suno-v4-5.mp3"],"generate_audio":true,"resolution":"480p","aspect_ratio":"16:9","duration":6,"nsfw_checker":true}}'