diff --git a/app/services/grok/services/video.py b/app/services/grok/services/video.py
index 11d2b50..6b1feb9 100644
--- a/app/services/grok/services/video.py
+++ b/app/services/grok/services/video.py
@@ -1257,19 +1257,29 @@ class VideoService:
                     )
 
                 # Process response.
+                idle_timeout_override = None
+                if extend_post_id and video_extension_start_time is not None:
+                    idle_timeout_override = (
+                        get_config("video.extension_stream_timeout")
+                        or get_config("video.stream_timeout")
+                    )
                 if is_stream:
                     processor = VideoStreamProcessor(
                         model,
                         token,
                         show_think,
                         upscale_on_finish=should_upscale,
+                        idle_timeout_override=idle_timeout_override,
                     )
                     return wrap_stream_with_usage(
                         processor.process(response), token_mgr, token, model
                     )
 
                 result = await VideoCollectProcessor(
-                    model, token, upscale_on_finish=should_upscale
+                    model,
+                    token,
+                    upscale_on_finish=should_upscale,
+                    idle_timeout_override=idle_timeout_override,
                 ).process(response)
                 try:
                     model_info = ModelService.get(model)
@@ -1322,6 +1332,7 @@ class VideoStreamProcessor(BaseProcessor):
         token: str = "",
         show_think: bool = None,
         upscale_on_finish: bool = False,
+        idle_timeout_override: float | None = None,
     ):
         super().__init__(model, token)
         self.response_id: Optional[str] = None
@@ -1330,6 +1341,7 @@ class VideoStreamProcessor(BaseProcessor):
 
         self.show_think = bool(show_think)
         self.upscale_on_finish = bool(upscale_on_finish)
+        self.idle_timeout_override = idle_timeout_override
 
     @staticmethod
     def _extract_video_id(video_url: str) -> str:
@@ -1388,7 +1400,7 @@ class VideoStreamProcessor(BaseProcessor):
         self, response: AsyncIterable[bytes]
     ) -> AsyncGenerator[str, None]:
         """Process video stream response."""
-        idle_timeout = get_config("video.stream_timeout")
+        idle_timeout = self.idle_timeout_override or get_config("video.stream_timeout")
 
         try:
             async for line in _with_idle_timeout(response, idle_timeout, self.model):
@@ -1534,9 +1546,16 @@ class VideoStreamProcessor(BaseProcessor):
 class VideoCollectProcessor(BaseProcessor):
     """Video non-stream response processor."""
 
-    def __init__(self, model: str, token: str = "", upscale_on_finish: bool = False):
+    def __init__(
+        self,
+        model: str,
+        token: str = "",
+        upscale_on_finish: bool = False,
+        idle_timeout_override: float | None = None,
+    ):
         super().__init__(model, token)
         self.upscale_on_finish = bool(upscale_on_finish)
+        self.idle_timeout_override = idle_timeout_override
 
     @staticmethod
     def _extract_video_id(video_url: str) -> str:
@@ -1648,7 +1667,7 @@ class VideoCollectProcessor(BaseProcessor):
         content = ""
         fallback_video_id = ""
         fallback_thumb = ""
-        idle_timeout = get_config("video.stream_timeout")
+        idle_timeout = self.idle_timeout_override or get_config("video.stream_timeout")
 
         try:
             async for line in _with_idle_timeout(response, idle_timeout, self.model):
diff --git a/app/static/public/js/video.js b/app/static/public/js/video.js
index 5d4cb6a..9eb18fa 100644
--- a/app/static/public/js/video.js
+++ b/app/static/public/js/video.js
@@ -21,6 +21,7 @@
   const editTimestampMs = document.getElementById('editTimestampMs');
   const editExtendPostId = document.getElementById('editExtendPostId');
   const editPromptInput = document.getElementById('editPromptInput');
+  const editLengthSelect = document.getElementById('editLengthSelect');
   const spliceBtn = document.getElementById('spliceBtn');
 
   const promptInput = document.getElementById('promptInput');
@@ -2269,7 +2270,7 @@
       const body = {
         prompt: prompt,
         aspect_ratio: ratioSelect ? ratioSelect.value : '16:9',
-        video_length: 10, // 官方延长固定为 10 秒
+        video_length: editLengthSelect ? parseInt(editLengthSelect.value, 10) : 10,
         resolution_name: resolutionSelect ? resolutionSelect.value : '480p',
         preset: (!prompt || prompt.trim() === '') ? 'spicy' : (presetSelect ? presetSelect.value : 'normal'),
         reasoning_effort: typeof DEFAULT_REASONING_EFFORT !== 'undefined' ? DEFAULT_REASONING_EFFORT : null,
diff --git a/app/static/public/pages/video.html b/app/static/public/pages/video.html
index 80423dc..f2e1e2b 100644
--- a/app/static/public/pages/video.html
+++ b/app/static/public/pages/video.html
@@ -215,6 +215,13 @@
                   <option value="15">15 秒</option>
                 </select>
               </div>
+              <div class="settings-block">
+                <label class="field-label" for="editLengthSelect">延长时长</label>
+                <select id="editLengthSelect" class="geist-input">
+                  <option value="6">6 秒</option>
+                  <option value="10" selected>10 秒</option>
+                </select>
+              </div>
               <div class="settings-block">
                 <label class="field-label" for="resolutionSelect">分辨率</label>
                 <select id="resolutionSelect" class="geist-input">
diff --git a/config.defaults.toml b/config.defaults.toml
index 1426e44..81c71c3 100644
--- a/config.defaults.toml
+++ b/config.defaults.toml
@@ -124,6 +124,8 @@ concurrent = 100
 timeout = 60
 # 流式空闲超时时间（秒）
 stream_timeout = 60
+# 视频延长流式空闲超时时间（秒）
+extension_stream_timeout = 300
 
 # ==================== 语音配置 ====================
 [voice]