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 generates cinematic, live-action–leaning clips from a text prompt plus a first-frame image, preserving the image’s subject and composition while adding expressive motion and stable aesthetics. It supports 4–12s duration control, adaptive aspect ratio that follows the input image, and reproducible outputs via seeds—ideal for ad creatives and short-drama shots that need a strong visual anchor.

Features

ByteDance Seedance V1.5 Pro Image-to-Video

Seedance V1.5 Pro (Image-to-Video) turns a single reference image into a short video clip, using your prompt to guide motion, camera behavior, and overall style. It’s a practical choice when you want to “bring a keyframe to life” while keeping the original composition as an anchor.

This wrapper is best for short, shot-based generations: portraits with subtle motion, product shots, scenic pans, and cinematic beats where prompt-controlled camera and action matter.

Key capabilities

• Image-conditioned motion generation Animates a still image into a coherent clip, aiming to preserve the subject and scene layout while introducing natural movement.

• Prompt-controlled action and camera Handles prompts that describe what moves and how the camera behaves (e.g., “slow dolly-in,” “handheld feel,” “locked-off tripod shot”).

• Flexible output framing Supports common aspect ratios for landscape, vertical, and square content, so you can target feeds, stories, and banners.

• Quality / cost tuning via resolution and duration Lets you trade off speed, cost, and visual detail by adjusting resolution and clip length.

Parameters and how to use

• prompt: (required) The instruction describing what should happen in the video (action + camera + style).
• image: (required) The reference image that anchors composition, subject identity, and lighting.
• last_image: An optional ending frame to steer the final composition (if supported by your deployment).
• duration: Video length in seconds.
• resolution: Output resolution (720p / 1080p).
• aspect_ratio: Output aspect ratio (e.g., 16:9, 9:16, 1:1, 4:3, 3:4, 21:9, or auto).
• camera_fixed: Whether to keep the camera position fixed (useful for “locked tripod” shots).
• seed: Random seed for reproducibility. Use a fixed seed when iterating.
• generate_audio: To decide whether to generate videos with audio.

Prompt

Keep prompts shot-focused and concrete. A reliable structure:

1. Subject & setting — who/what, where, time of day
2. Action — clear verbs (“turns,” “walks,” “waves,” “wind blows”)
3. Camera — “locked-off,” “slow dolly-in,” “orbit,” “tilt up,” “handheld”
4. Look — “cinematic,” “35mm film,” “soft rim light,” “high contrast,” “anime cel-shaded”

Example

“Close-up portrait in soft window light. The subject slowly turns toward camera and smiles. Subtle handheld feel, shallow depth of field, cinematic color grade, film grain.”

Tips

• Prefer one shot per prompt. If you need multiple beats, write them in order with short sentences.
• If you see unwanted camera drift, set camera_fixed: true and describe a locked-off camera in the prompt.

Media (Images)

• Upload a clear, high-quality JPG/PNG as image.
• If you use last_image, choose an end frame with similar framing and lighting to reduce jumpy transitions.

Other parameters

• duration Start short for iteration. Increase length only after motion and framing look right.

• resolution Use 720p for fast previews, 1080p for maximum detail.

• aspect_ratio Match your target platform:

  • 16:9 for landscape and cinematic shots
  • 9:16 for vertical shorts / stories
  • 1:1 for square feeds
  • 4:3, 3:4, 21:9 for specific layouts

• generate_audio Turn it on to speci to generate audio or not.

• seed Set a fixed seed to compare prompt changes more fairly. -1 means a random seed will be used.

After you finish configuring the parameters, click Run, preview the result, and iterate if needed.

Notes

• Match aspect ratios. If your input image is strongly vertical, pick a vertical aspect_ratio to avoid awkward crops or stretched motion.
• Reduce flicker with simpler motion. If you see temporal artifacts, lower the motion intensity in the prompt and keep the camera simpler (or set camera_fixed).
• Iterate cheaply. Start at 720p + shorter duration, then scale up to 1080p once the motion and framing are correct.

Related Models

• Seedance V1 Pro Fast (Image-to-Video) – Faster iterations with a strong speed/quality balance.
• Seedance V1 Pro I2V 720P – A stable 720p I2V option for consistent results at mid cost.
• Seedance V1 Pro I2V 480p – Lower-resolution I2V for rapid prototyping and budget runs.
• bytedance/seedance-upscaler – Upscale an existing clip when you like the motion but need higher fidelity.

# 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}"