curl --request POST \
--url https://api.evolink.ai/v1/videos/generations \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"model": "kling-v4-flash-image-to-video",
"prompt": "让画面中的人物缓缓转头微笑",
"image_start": "https://example.com/portrait.jpg",
"duration": 5,
"quality": "720p"
}
'{
"created": 1757169743,
"id": "task-unified-1757169743-7cvnl5zw",
"model": "kling-v4-flash-image-to-video",
"object": "video.generation.task",
"progress": 0,
"status": "pending",
"task_info": {
"can_cancel": false,
"estimated_time": 300,
"video_duration": 5
},
"type": "video",
"usage": {
"billing_rule": "per_second",
"credits_reserved": 31.96,
"user_group": "default"
}
}{
"error": {
"code": "invalid_request",
"message": "Invalid request parameters",
"type": "invalid_request_error"
}
}{
"error": {
"code": "unauthorized",
"message": "Invalid or expired token",
"type": "authentication_error"
}
}{
"error": {
"code": "insufficient_quota",
"message": "Insufficient quota. Please top up your account.",
"type": "insufficient_quota"
}
}{
"error": {
"code": "model_access_denied",
"message": "Token does not have access to model: kling-v4-flash-image-to-video",
"type": "invalid_request_error"
}
}{
"error": {
"code": "rate_limit_exceeded",
"message": "Too many requests, please try again later",
"type": "rate_limit_error"
}
}{
"error": {
"code": "internal_error",
"message": "Internal server error",
"type": "api_error"
}
}Kling-4.0-Flash 图生视频
- Kling-4.0 Flash Image to Video (kling-v4-flash-image-to-video) 模型支持图生视频功能
- 仅支持首帧,不支持尾帧与中间帧
- 画面比例由首帧图决定,不接受
aspect_ratio - 仅支持
720p,时长3~20秒 - 异步处理模式,使用返回的任务ID 进行查询
- 生成的视频链接,有效期为24小时,请尽快保存
Flash 与 Kling 4.0 如何选择
Flash 面向高频创作与快速创意迭代,侧重生成速度与成本效率,适合制作 720p 短视频。以下对比为 EvoLink API 当前支持范围。
| 项目 | Kling 4.0 Flash | Kling 4.0 |
|---|---|---|
| 输出分辨率 | 720p | 720p、1080p |
| 输出时长 | 3 ~ 20 秒 | 3 ~ 30 秒 |
| 画面控制 | 仅首帧 image_start | 首帧、可选尾帧 image_end、最多 8 张中间帧 keyframes |
需要首尾帧过渡、中间关键帧控制、1080p 或超过 20 秒时,请使用 Kling 4.0 图生视频。Flash 请求仅传首帧,不要传 image_end 或 keyframes。
Flash 使用独立的模型 ID。迁移时请同步检查 model、quality 与 duration,实际费用以所选 Flash 模型的当前价格及任务结算结果为准。
curl --request POST \
--url https://api.evolink.ai/v1/videos/generations \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"model": "kling-v4-flash-image-to-video",
"prompt": "让画面中的人物缓缓转头微笑",
"image_start": "https://example.com/portrait.jpg",
"duration": 5,
"quality": "720p"
}
'{
"created": 1757169743,
"id": "task-unified-1757169743-7cvnl5zw",
"model": "kling-v4-flash-image-to-video",
"object": "video.generation.task",
"progress": 0,
"status": "pending",
"task_info": {
"can_cancel": false,
"estimated_time": 300,
"video_duration": 5
},
"type": "video",
"usage": {
"billing_rule": "per_second",
"credits_reserved": 31.96,
"user_group": "default"
}
}{
"error": {
"code": "invalid_request",
"message": "Invalid request parameters",
"type": "invalid_request_error"
}
}{
"error": {
"code": "unauthorized",
"message": "Invalid or expired token",
"type": "authentication_error"
}
}{
"error": {
"code": "insufficient_quota",
"message": "Insufficient quota. Please top up your account.",
"type": "insufficient_quota"
}
}{
"error": {
"code": "model_access_denied",
"message": "Token does not have access to model: kling-v4-flash-image-to-video",
"type": "invalid_request_error"
}
}{
"error": {
"code": "rate_limit_exceeded",
"message": "Too many requests, please try again later",
"type": "rate_limit_error"
}
}{
"error": {
"code": "internal_error",
"message": "Internal server error",
"type": "api_error"
}
}授权
##所有接口均需要使用Bearer Token进行认证##
获取 API Key:
访问 API Key 管理页面 获取您的 API Key
使用时在请求头中添加:
Authorization: Bearer YOUR_API_KEY
请求体
视频生成模型名称
kling-v4-flash-image-to-video "kling-v4-flash-image-to-video"
首帧图片URL,用于图生视频功能(必传)
注意:
- 图像大小:不超过
10MB - 支持的文件格式:
.jpg、.jpeg、.png - 图像尺寸:宽高 ≥
300px,宽高比在1:2.5~2.5:1之间 - 图像URL需要服务器能直接访问,或者访问时会直接下载
"https://example.com/portrait.jpg"
文本提示词,描述想要生成什么样的视频
注意:
- 最长
2500字符
2500"让画面中的人物缓缓转头微笑"
视频时长(秒),默认为5秒
说明:
- 范围:
3~20的整数
3 <= x <= 205
分辨率档位
说明:
- 仅支持
720p
720p "720p"
任务完成后的HTTPS回调地址
回调时机:
- 任务完成(completed)、失败(failed)或取消(cancelled)时触发
- 在计费确认完成后发送
安全限制:
- 仅支持HTTPS协议
- 禁止回调到内网IP地址(127.0.0.1、10.x.x.x、172.16-31.x.x、192.168.x.x等)
- URL长度不超过
2048字符
回调机制:
- 超时时间:
10秒 - 失败后最多重试
3次(会分别在失败的1秒/2秒/4秒后进行重试) - 回调响应体格式与任务查询接口返回的格式一致
- 回调地址若返回2xx状态码视为成功,其他状态码会触发重试
"https://your-domain.com/webhooks/video-task-completed"
响应
视频生成任务创建成功
任务创建时间戳
1757169743
任务ID
"task-unified-1757169743-7cvnl5zw"
实际使用的模型名称
"kling-v4-flash-image-to-video"
任务的具体类型
video.generation.task 任务进度百分比 (0-100)
0 <= x <= 1000
任务状态
pending, processing, completed, failed "pending"
视频任务详细信息
Show child attributes
Show child attributes
任务的输出类型
text, image, audio, video "video"
使用量和计费信息
Show child attributes
Show child attributes