diff --git a/components/canvas/CanvasChatPanel.tsx b/components/canvas/CanvasChatPanel.tsx
index 5b6089405..7879bba21 100644
--- a/components/canvas/CanvasChatPanel.tsx
+++ b/components/canvas/CanvasChatPanel.tsx
@@ -1007,7 +1007,7 @@ function extractCanvasImageAnalysisSection(content: string): CanvasAnalysisSecti
 }
 
 function normalizeVideoParamsForProvider(
-  params: VideoGenerationParams | null | undefined,
+  params: Partial<VideoGenerationParams> | null | undefined,
   providerType?: string,
   capability?: VideoToolCapabilityContract | null
 ): VideoGenerationParams {
diff --git a/components/chat.tsx b/components/chat.tsx
index 1a5afbff9..cc19661a3 100644
--- a/components/chat.tsx
+++ b/components/chat.tsx
@@ -81,7 +81,7 @@ function normalizeImageParamsForProvider(
 }
 
 function normalizeVideoParamsForProvider(
-  params: VideoGenerationParams | null | undefined,
+  params: Partial<VideoGenerationParams> | null | undefined,
   providerType?: string,
   capability?: VideoToolCapabilityContract | null
 ): VideoGenerationParams {
diff --git a/lib/ai/tools/generate-video.ts b/lib/ai/tools/generate-video.ts
index 0cc815473..1788407d6 100644
--- a/lib/ai/tools/generate-video.ts
+++ b/lib/ai/tools/generate-video.ts
@@ -483,10 +483,10 @@ export function generateVideo({ dataStream }: { dataStream: any }) {
         .describe("视频宽高比"),
       duration: z
         .number()
-        .min(2)
-        .max(12)
+        .min(1)
+        .max(600)
         .default(5)
-        .describe("视频时长（2-12秒）"),
+        .describe("视频时长（秒）。优先使用当前视频模型配置的秒数档位，服务端会按模型能力动态校验。"),
       watermark: z.boolean().default(true).describe("是否添加水印"),
       cameraFixed: z.boolean().default(false).describe("是否固定摄像头"),
       seed: z.number().optional().describe("随机种子（可选）"),
diff --git a/types/ai.ts b/types/ai.ts
index 3b0e15a23..6f92f910e 100644
--- a/types/ai.ts
+++ b/types/ai.ts
@@ -73,7 +73,7 @@ export interface VideoGenerationOptions {
   // 视频参数
   resolution?: VideoResolution;
   ratio?: VideoRatio;
-  duration?: number; // 2-12 秒
+  duration?: number; // 按模型能力或管理员配置的秒数档位
   fps?: number; // 帧率（默认 24）
   watermark?: boolean; // 是否包含水印
   cameraFixed?: boolean; // 是否固定摄像头