Longcat Avatar
Playground
Try it on WavespeedAI!LongCat Avatar produces super-realistic, lip-synchronized long video generation with natural dynamics and consistent identity. Converts one photo + audio into audio-driven talking or singing avatar videos (Image-to-Video), up to 2 minutes, 720p tier $0.30/5s. Ready-to-use REST API, no coldstarts, affordable pricing.
Features
LongCat Avatar
What is LongCat Avatar?
LongCat Avatar is an audio-driven video generation model that produces super-realistic, lip-synchronized long video generation with natural dynamics and consistent identity. It converts static photos into lively speaking or singing videos with precise lip sync, aligning the head, face, and body movements to the audio.
Why it looks great
-
Accurate lip synchronization: aligns lip motion precisely with audio, preserving natural rhythm and pronunciation.
-
Full-body coherence: captures head movements, facial expressions, and posture changes beyond the lips.
-
Identity preservation: maintains consistent facial identity and visual style across frames.
-
Image-to-video capability: turns static photos into realistic speaking or singing videos.
-
Natural dynamics: produces unnoticeable color tone consistency and natural dynamics across multiple speaker scenarios.
Pricing
| Output Resolution | Cost per 5 seconds | Max Length |
|---|---|---|
| 480p | $0.15 | 2 minutes |
| 720p | $0.30 | 2 minutes |
Billing Rules
- Standard Rate: $0.03 per second
- HD (720p) Rate: $0.06 per second (Double the Standard Rate)
- Minimum Charge: All videos are billed for a minimum of 5 seconds (costing at least $0.15).
- Billing Cap: To keep your costs predictable, billing is capped at 120 seconds (2 minutes).
How to Use
- Upload the audio file.
- Upload the image (the person to animate).
- (Optional) Add a prompt to guide expression, style, or pose.
- Select the resolution (480p or 720p).
- Set the seed (set a fixed number for reproducibility).
- Submit the job and download the result once it’s ready.
Note
- Max clip length per job: up to 2 minutes
- Processing speed: approximately 10-30 seconds of wall time per 1 second of video (varies by resolution and queue load)
Reference
Authentication
For authentication details, please refer to the Authentication Guide.
API Endpoints
Submit Task & Query Result
# Submit the task
curl --location --request POST "https://api.wavespeed.ai/api/v3/wavespeed-ai/longcat-avatar" \
--header "Content-Type: application/json" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}" \
--data-raw '{
"resolution": "480p",
"seed": -1
}'
# Get the result
curl --location --request GET "https://api.wavespeed.ai/api/v3/predictions/${requestId}/result" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}"
Parameters
Task Submission Parameters
Request Parameters
| Parameter | Type | Required | Default | Range | Description |
|---|---|---|---|---|---|
| audio | string | Yes | - | - | The audio for generating the output. |
| image | string | Yes | - | The image for generating the output. | |
| prompt | string | No | - | The positive prompt for the generation. | |
| resolution | string | No | 480p | 480p, 720p | The resolution of the output video. |
| seed | integer | No | -1 | -1 ~ 2147483647 | The random seed to use for the generation. -1 means a random seed will be used. |
Response Parameters
| Parameter | Type | Description |
|---|---|---|
| code | integer | HTTP status code (e.g., 200 for success) |
| message | string | Status message (e.g., “success”) |
| data.id | string | Unique identifier for the prediction, Task Id |
| data.model | string | Model ID used for the prediction |
| data.outputs | array | Array of URLs to the generated content (empty when status is not completed) |
| data.urls | object | Object containing related API endpoints |
| data.urls.get | string | URL to retrieve the prediction result |
| data.has_nsfw_contents | array | Array of boolean values indicating NSFW detection for each output |
| data.status | string | Status of the task: created, processing, completed, or failed |
| data.created_at | string | ISO timestamp of when the request was created (e.g., “2023-04-01T12:34:56.789Z”) |
| data.error | string | Error message (empty if no error occurred) |
| data.timings | object | Object containing timing details |
| data.timings.inference | integer | Inference time in milliseconds |
Result Request Parameters
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
| id | string | Yes | - | Task ID |
Result Response Parameters
| Parameter | Type | Description |
|---|---|---|
| code | integer | HTTP status code (e.g., 200 for success) |
| message | string | Status message (e.g., “success”) |
| data | object | The prediction data object containing all details |
| data.id | string | Unique identifier for the prediction, the ID of the prediction to get |
| data.model | string | Model ID used for the prediction |
| data.outputs | string | Array of URLs to the generated content (empty when status is not completed). |
| data.urls | object | Object containing related API endpoints |
| data.urls.get | string | URL to retrieve the prediction result |
| data.status | string | Status of the task: created, processing, completed, or failed |
| data.created_at | string | ISO timestamp of when the request was created (e.g., “2023-04-01T12:34:56.789Z”) |
| data.error | string | Error message (empty if no error occurred) |
| data.timings | object | Object containing timing details |
| data.timings.inference | integer | Inference time in milliseconds |