Bytedance Seedance V1.5 Pro Image To Video Fast

Bytedance Seedance V1.5 Pro Image To Video Fast

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Seedance 1.5 Pro Fast Image-to-Video transforms a single image (plus optional text prompt) into cinematic, live-action-leaning clips while preserving subject identity, composition, and first-frame fidelity. Built for stable production use with a ready-to-use REST API, no cold starts, and predictable pricing.

Features

ByteDance Seedance V1.5 Pro Fast — Image-to-Video

Seedance V1.5 Pro Fast (Image-to-Video) generates short, cinematic clips from a text prompt + a first-frame image. It’s built for rapid iteration while keeping strong subject consistency, coherent motion, and a polished, live-action–leaning look.

Use it to animate a keyframe: keep the composition and identity from the input image, then direct motion, camera behavior, and style with your prompt.

Key capabilities

• Image-anchored animation Animates from a single reference image while preserving subject, lighting, and composition.

• Prompt-guided motion + camera Responds well to shot-style prompts describing what moves and how the camera behaves (dolly-in, orbit, locked-off, handheld feel).

• Short-form duration control Designed for concise, shot-based clips with controllable duration.

• Framing control via aspect ratio Supports common aspect ratios for vertical, square, and widescreen delivery.

• Optional audio generation Toggle generate_audio on/off depending on whether you want sound included.

• Seeded iteration Fix seed to compare prompt tweaks fairly and reduce randomness between runs.

Parameters

How to use

1. Upload the image you want to animate (clean subject, strong composition works best).

2. Write a prompt as a single shot direction: what moves, how it moves, and the vibe.

3. (Optional) Add a last_image if you need a specific ending pose/framing.

4. Choose aspect_ratio to match your target platform (9:16 for shorts, 16:9 for YouTube).

5. Set duration (start short for iteration, then increase once the motion looks right).

6. Pick resolution (720p for drafts, 1080p for finals).

7. Toggle generate_audio:

   • true for audio-included clips
   • false for silent clips (cheaper)

8. Use camera_fixed for tripod-like stability, or keep it off if you describe camera motion.

9. Set a seed to iterate reliably, or keep -1 for new variations each run.

Prompt tips

A reliable structure:

1. Subject & setting — who/what, where, time/lighting
2. Motion — clear verbs + intensity (slowly, subtly, rapidly)
3. Camera — locked-off / slow dolly-in / orbit / handheld
4. Look — cinematic, soft rim light, 35mm film grain, etc.

Example:

Futuristic orbital living room interior. Soft sunlight, vast luminous planet outside the panoramic window. Slow dolly-in, subtle floating dust, gentle parallax, cinematic color grade, calm mood.

Practical tips:

• Prefer one shot per prompt. For multiple beats, list them in order as short sentences.
• If you want a locked shot, say “locked-off / tripod” and set camera_fixed = true.
• Keep prompts positive and specific; avoid long “don’t” lists.

Pricing

Effective rates

Example costs

Notes

• If motion looks jittery, simplify action/camera instructions first, then add complexity gradually.
• Set aspect_ratio early so you don’t optimize a shot that later needs reframing.
• Keep seed fixed while refining prompts to make results comparable.

Related Models

• Seedance V1.5 Pro (Image-to-Video) — Higher-fidelity image-to-video when you want maximum detail and polish.
• Seedance V1.5 Pro Fast (Text-to-Video) — Fast text-only video generation for rapid concept exploration.
• Seedance V1.5 Pro (Text-to-Video) — Full-quality text-to-video for more refined outputs.
• ByteDance Video Upscaler — Upscale generated clips when you like the motion but need higher clarity.

# Submit the task
curl --location --request POST "https://api.wavespeed.ai/api/v3/bytedance/seedance-v1.5-pro/image-to-video-fast" \
--header "Content-Type: application/json" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}" \
--data-raw '{
    "duration": 5,
    "resolution": "720p",
    "generate_audio": true,
    "camera_fixed": false,
    "seed": -1
}'

# Get the result
curl --location --request GET "https://api.wavespeed.ai/api/v3/predictions/${requestId}/result" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}"