PixVerse 5.5: Cinematic Image-to-Video Generation with Sound Sync on playground and API | RunComfy
pixverse/pixverse/v5.5/image-to-video
Transform text or images into cinematic videos with smooth motion, synced audio, and multi-scene storytelling, all generated quickly through browser or API for seamless creative production.
Table of contents
1. Get started
Use RunComfy's API to run pixverse/pixverse/v5.5/image-to-video. For accepted inputs and outputs, see the model's schema.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/pixverse/pixverse/v5.5/image-to-video \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "the girl is smiling",
"image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7252/media-files/input-1-1.webp"
}'2. Authentication
Set the YOUR_API_TOKEN environment variable with your API key (manage keys in your Profile) and include it on every request as a Bearer token via the Authorization header: Authorization: Bearer $YOUR_API_TOKEN.
3. API reference
Submit a request
Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/pixverse/pixverse/v5.5/image-to-video \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "the girl is smiling",
"image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7252/media-files/input-1-1.webp"
}'Monitor request status
Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").
curl --request GET \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
--header "Authorization: Bearer <token>"Retrieve request results
Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.
curl --request GET \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
--header "Authorization: Bearer <token>"Cancel a request
Cancel a queued job by request_id, in-progress jobs cannot be cancelled.
curl --request POST \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
--header "Authorization: Bearer <token>"4. File inputs
Hosted file (URL)
Provide a publicly reachable HTTPS URL. Ensure the host allows server‑side fetches (no login/cookies required) and isn't rate‑limited or blocking bots. Recommended limits: images ≤ 50 MB (~4K), videos ≤ 100 MB (~2–5 min @ 720p). Prefer stable or pre‑signed URLs for private assets.
5. Schema
Input schema
{
"type": "object",
"title": "Input",
"required": [
"prompt",
"image_url"
],
"properties": {
"prompt": {
"title": "Prompt",
"description": "Text prompt describing the content of the generated video.",
"type": "string",
"default": "the girl is smiling"
},
"aspect_ratio": {
"title": "Aspect Ratio (W:H)",
"description": "The aspect ratio of the generated video.",
"type": "string",
"enum": [
"16:9",
"4:3",
"1:1",
"3:4",
"9:16"
],
"default": "16:9"
},
"resolution": {
"title": "Resolution",
"description": "The resolution of the generated video. ",
"type": "string",
"enum": [
"360p",
"540p",
"720p",
"1080p"
],
"default": "720p"
},
"duration": {
"title": "Duration",
"description": "Duration of the generated video in seconds. Longer durations cost more. 1080p videos are limited to 5 or 8 seconds.",
"type": "integer",
"enum": [
5,
8,
10
],
"default": 5
},
"negative_prompt": {
"title": "Negative Prompt",
"description": "Negative prompt to exclude undesired qualities from the generation output.",
"type": "string",
"default": "blurry, low quality, low resolution, pixelated, noisy, grainy, out of focus, poorly lit, poorly exposed, poorly composed, poorly framed, poorly cropped, poorly color corrected, poorly color graded"
},
"style": {
"title": "Style",
"description": "The style of the generated video.",
"type": "string",
"enum": [
"anime",
"3d_animation",
"clay",
"comic",
"cyberpunk"
],
"default": "comic"
},
"seed": {
"title": "Seed",
"description": "",
"type": "integer",
"default": 0
},
"generate_audio_switch": {
"title": "Generate Audio",
"description": "Enable audio generation (BGM, SFX, dialogue).",
"type": "boolean",
"default": false
},
"generate_multi_clip_switch": {
"title": "Generate Multi-Clip",
"description": "Enable multi-clip generation with dynamic camera changes.",
"type": "boolean",
"default": false
},
"thinking_type": {
"title": "Prompt Optimization",
"description": "Prompt optimization mode: 'enabled' to optimize, 'disabled' to turn off, 'auto' for model decision.",
"type": "string",
"enum": [
"enabled",
"disabled",
"auto"
],
"default": "auto"
},
"image_url": {
"title": "Image",
"description": "URL of the image to use as the first frame.",
"type": "string",
"default": "https://playgrounds-storage-public.runcomfy.net/tools/7252/media-files/input-1-1.webp"
}
}
}Output schema
{
"output": {
"type": "object",
"properties": {
"image": {
"type": "string",
"format": "uri",
"description": "single image URL"
},
"video": {
"type": "string",
"format": "uri",
"description": "single video URL"
},
"images": {
"type": "array",
"description": "multiple image URLs",
"items": { "type": "string", "format": "uri" }
},
"videos": {
"type": "array",
"description": "multiple video URLs",
"items": { "type": "string", "format": "uri" }
}
}
}
}