Video extension

POST

/v1beta/models/{model}:predictLongRunning

Official Documentation: https://docs.cloud.google.com/vertex-ai/generative-ai/docs/model-reference/veo-video-generation?hl=en#instances

In the API for querying tasks, a similar JSON will be returned:
Pass the video-uri into this API to extend the previous video.

Supported Models:
veo-3.1-fast-generate-preview
veo-3.1-generate-preview

Price:
veo-3.1-fast-generate-preview: 0.15 PTC/second
veo-3.1-generate-preview: 0.4 PTC/second

Note: The original official documentation link and video-related URI provided cannot be accessed or parsed normally (error messages: "This is an overseas webpage and cannot be accessed currently" and "Webpage parsing failed, possibly an unsupported webpage type"). The above content is translated and organized based on the limited accessible information. For accurate and up-to-date details, it is recommended to access the official documentation through a valid network environment.

Request

Path Params

Header Params

Body Params application/jsonRequired

Example

{
    "instances": [
        {
            "prompt": "a cat ",
            "video": {
                "uri": "https://generativelanguage.googleapis.com/v1beta/files/xxxxx:download?alt=media"
            }
        }
    ],
    "parameters": {
        "resolution": "720p"
    }
}

Request Code Samples

Shell

JavaScript

Java

Swift

PHP

Python

HTTP

Objective-C

Ruby

OCaml

Dart

curl --location --request POST 'https://api.302.ai/v1beta/models/veo-3.1-fast-generate-preview:predictLongRunning' \
--header 'x-goog-api-key: ' \
--header 'Content-Type: application/json' \
--data-raw '{
    "instances": [
        {
            "prompt": "a cat ",
            "video": {
                "uri": "https://generativelanguage.googleapis.com/v1beta/files/xxxxx:download?alt=media"
            }
        }
    ],
    "parameters": {
        "resolution": "720p"
    }
}'

Responses

🟢200success

application/json

Body

Example

{
    "name": "projects/PROJECT_ID/locations/us-central1/publishers/google/models/MODEL_ID/operations/a1b07c8e-7b5a-4aba-bb34-3e1ccb8afcc8"
}

Modified at 2026-01-23 09:20:47

Download video

Veo3.1（Text-to-Video）