google/veo3.1-fast/start-end-to-video-channel-low-price

POST

/openapi/v2/rhart-video-v3.1-fast/start-end-to-video

Veo 3.1 Fast is engineered for creators who prioritize speed and rapid iteration without sacrificing structural control. In Start & End Frame mode, it delivers near-instantaneous interpolation, bridging two visual anchors with fluid motion in seconds. This model is optimized for low-latency workflows and high-volume prototyping. While maximizing throughput, it maintains impressive consistency in geometry and motion logic. Channel-low-price: priced significantly lower than the Official Stable Edition, but stability is not guaranteed.

Request

Authorization

Header Params

Body Params application/jsonRequired

Example

{
    "prompt": "Seamlessly bridge start and end frames with physics-driven parkour leap: explosive upward propulsion → hang-time apex (body fully extended) → controlled descent with wind resistance effects. Prioritize: Fluid motion blur & natural shadow progression Unbroken character consistency (face, outfit, hair) Realistic gravity/momentum physics Dynamic low-angle camera tracking the arc Subtle ambient audio sync: wind rush + soft landing thud Style: cinematic realism",
    "firstFrameUrl": "https://www.runninghub.cn/view?filename=c3342b164deca334c92d129d2cebbababae857ac2e6b8085c400bf6dbac5ea1e.png&type=input&subfolder=&Rh-Comfy-Auth=eyJ1c2VySWQiOiIzZjY1MTNlNWEwNjY1N2I4OGYyNjU5NTEzYmU3ZDM0YyIsInNpZ25FeHBpcmUiOjE3NzAxMjAyNTc3NzcsInRzIjoxNzY5NTE1NDU3Nzc3LCJzaWduIjoiMWM1MGJkZTYwZmVlMDlkZGM1NjVkZDM1YjYzM2JhOGUifQ==&Rh-Identify=3f6513e5a06657b88f2659513be7d34c&rand=0.11143781706539635",
    "lastFrameUrl": "https://www.runninghub.cn/view?filename=fc01ff32106a33d129468f0430769e50462a16521cccff6b1301408ce7c158e4.png&type=input&subfolder=&Rh-Comfy-Auth=eyJ1c2VySWQiOiIzZjY1MTNlNWEwNjY1N2I4OGYyNjU5NTEzYmU3ZDM0YyIsInNpZ25FeHBpcmUiOjE3NzAxMjAyNTc3NzcsInRzIjoxNzY5NTE1NDU3Nzc3LCJzaWduIjoiMWM1MGJkZTYwZmVlMDlkZGM1NjVkZDM1YjYzM2JhOGUifQ==&Rh-Identify=3f6513e5a06657b88f2659513be7d34c&rand=0.7607718537661649",
    "aspectRatio": "9:16",
    "duration": "8",
    "resolution": "720p"
}

Request Code Samples

Shell

JavaScript

Java

Swift

PHP

Python

HTTP

Objective-C

Ruby

OCaml

Dart

curl --location --request POST 'https://www.runninghub.ai/openapi/v2/rhart-video-v3.1-fast/start-end-to-video' \
--header 'Authorization: Bearer [Your API KEY]' \
--header 'Authorization: Bearer [Your API KEY]' \
--header 'Content-Type: application/json' \
--data-raw '{
    "prompt": "Seamlessly bridge start and end frames with physics-driven parkour leap: explosive upward propulsion → hang-time apex (body fully extended) → controlled descent with wind resistance effects. Prioritize: Fluid motion blur & natural shadow progression Unbroken character consistency (face, outfit, hair) Realistic gravity/momentum physics Dynamic low-angle camera tracking the arc Subtle ambient audio sync: wind rush + soft landing thud Style: cinematic realism",
    "firstFrameUrl": "https://www.runninghub.cn/view?filename=c3342b164deca334c92d129d2cebbababae857ac2e6b8085c400bf6dbac5ea1e.png&type=input&subfolder=&Rh-Comfy-Auth=eyJ1c2VySWQiOiIzZjY1MTNlNWEwNjY1N2I4OGYyNjU5NTEzYmU3ZDM0YyIsInNpZ25FeHBpcmUiOjE3NzAxMjAyNTc3NzcsInRzIjoxNzY5NTE1NDU3Nzc3LCJzaWduIjoiMWM1MGJkZTYwZmVlMDlkZGM1NjVkZDM1YjYzM2JhOGUifQ==&Rh-Identify=3f6513e5a06657b88f2659513be7d34c&rand=0.11143781706539635",
    "lastFrameUrl": "https://www.runninghub.cn/view?filename=fc01ff32106a33d129468f0430769e50462a16521cccff6b1301408ce7c158e4.png&type=input&subfolder=&Rh-Comfy-Auth=eyJ1c2VySWQiOiIzZjY1MTNlNWEwNjY1N2I4OGYyNjU5NTEzYmU3ZDM0YyIsInNpZ25FeHBpcmUiOjE3NzAxMjAyNTc3NzcsInRzIjoxNzY5NTE1NDU3Nzc3LCJzaWduIjoiMWM1MGJkZTYwZmVlMDlkZGM1NjVkZDM1YjYzM2JhOGUifQ==&Rh-Identify=3f6513e5a06657b88f2659513be7d34c&rand=0.7607718537661649",
    "aspectRatio": "9:16",
    "duration": "8",
    "resolution": "720p"
}'

Responses

🟢200成功

application/json

Task result query endpoint: /openapi/v2/query

Body

Examples

Submit response exampleTask success response example

{
    "taskId": "2013508786110730241",
    "status": "RUNNING",
    "errorCode": "",
    "errorMessage": "",
    "results": null,
    "clientId": "f828b9af25161bc066ef152db7b29ccc",
    "promptTips": "{\"result\": true, \"error\": null, \"outputs_to_execute\": [\"4\"], \"node_errors\": {}}"
}

Modified at 2026-03-28 04:00:04

google/veo3.1-pro/image-to-video-official-stable

google/veo3.1-pro/reference-to-video-official-stable