diff --git a/src/views/flow/components/params/MediaAnalysisParams.vue b/src/views/flow/components/params/MediaAnalysisParams.vue
index f83027c..e8674c8 100644
--- a/src/views/flow/components/params/MediaAnalysisParams.vue
+++ b/src/views/flow/components/params/MediaAnalysisParams.vue
@@ -117,8 +117,8 @@
               <span>当前模式参数</span>
               <el-button :icon="Refresh" text type="primary" @click.stop="restorePreset">恢复默认</el-button>
             </div>
-            <el-form-item label="抽取帧数">
-              <el-slider v-model="formData.analysisTuning.maxFrames" :min="2" :max="16" :step="1" show-input />
+            <el-form-item label="采样帧率（帧/秒）">
+              <el-slider v-model="formData.analysisTuning.sampleFps" :min="0.25" :max="6" :step="0.25" show-input />
             </el-form-item>
             <el-form-item label="图片最大宽度">
               <el-slider v-model="formData.analysisTuning.maxWidth" :min="640" :max="1280" :step="64" show-input />
@@ -171,9 +171,9 @@ const advancedSections = ref([])
  * fallbackToAccurate 仅 AUTO 模式有意义，表示快速分析置信度不足时是否升级为精确分析。
  */
 const analysisPresets = {
-  FAST: { maxFrames: 6, maxWidth: 896, confidenceThreshold: 0.7, fallbackToAccurate: false },
-  AUTO: { maxFrames: 8, maxWidth: 960, confidenceThreshold: 0.75, fallbackToAccurate: true },
-  ACCURATE: { maxFrames: 10, maxWidth: 1120, confidenceThreshold: 0.8, fallbackToAccurate: false },
+  FAST: { sampleFps: 1, maxWidth: 896, confidenceThreshold: 0.7, fallbackToAccurate: false },
+  AUTO: { sampleFps: 2, maxWidth: 960, confidenceThreshold: 0.75, fallbackToAccurate: true },
+  ACCURATE: { sampleFps: 3, maxWidth: 1120, confidenceThreshold: 0.8, fallbackToAccurate: false },
 }
 /**
  * 表单使用一个稳定的 reactive 对象，initData 只更新字段而不替换对象，保证 Element Plus
@@ -340,7 +340,7 @@ const clamp = (value, minimum, maximum, fallback) => {
 const normalizeStoredTuning = (value, preset) => {
   const stored = parseStoredTuning(value)
   return {
-    maxFrames: Math.round(clamp(stored.maxFrames, 2, 16, preset.maxFrames)),
+    sampleFps: Math.round(clamp(stored.sampleFps, 0.25, 6, preset.sampleFps) * 100) / 100,
     maxWidth: Math.round(clamp(stored.maxWidth, 640, 1280, preset.maxWidth)),
     confidenceThreshold: clamp(stored.confidenceThreshold, 0.5, 0.95, preset.confidenceThreshold),
     fallbackToAccurate: typeof stored.fallbackToAccurate === 'boolean'
diff --git a/src/views/flow/config.js b/src/views/flow/config.js
index 26d6e38..cfdda8d 100644
--- a/src/views/flow/config.js
+++ b/src/views/flow/config.js
@@ -556,7 +556,7 @@ function handler(params) {
           { name: "videoUrl", type: "quote", input: "", quote: "", required: true, disabled: true },
           { name: "instruction", type: "input", input: "", required: true, disabled: true },
           { name: "analysisMode", type: "input", input: "AUTO", required: false, disabled: true },
-          { name: "analysisTuning", type: "input", input: { maxFrames: 8, maxWidth: 960, confidenceThreshold: 0.75, fallbackToAccurate: true }, required: false, disabled: true },
+          { name: "analysisTuning", type: "input", input: { sampleFps: 2, maxWidth: 960, confidenceThreshold: 0.75, fallbackToAccurate: true }, required: false, disabled: true },
         ],
         outputType: "json",
         outputParams: [