diff --git a/apps/web/src/pages/generate/hooks/useCanvasPlayer.ts b/apps/web/src/pages/generate/hooks/useCanvasPlayer.ts
index 902f9d5c2..6fba99895 100644
--- a/apps/web/src/pages/generate/hooks/useCanvasPlayer.ts
+++ b/apps/web/src/pages/generate/hooks/useCanvasPlayer.ts
@@ -222,7 +222,6 @@ export function useCanvasPlayer(
   const videoDimRef = useRef<{ width: number; height: number }>({ width: 0, height: 0 })
   const isDestroyedRef = useRef(false)
   const lastProgressUpdateRef = useRef<number>(0)
-  const descriptionCache = useRef<Map<string, ArrayBuffer>>(new Map())
 
   // 计算总时长
   const totalDuration = segments.reduce((sum, seg) => sum + (seg.endTime - seg.startTime), 0)
@@ -336,15 +335,7 @@ export function useCanvasPlayer(
           }
 
           // 提取编解码器配置数据（HEVC 必需，H.264 也需要）
-          let description = extractCodecDescription(buffer)
-
-          // 如果当前分片没有 description，尝试从缓存获取
-          if (!description) {
-            for (const cached of descriptionCache.current.values()) {
-              description = cached
-              break
-            }
-          }
+          const description = extractCodecDescription(buffer)
 
           // ✅ 如果 description 缺失，无法解码 HEVC
           if (!description) {
@@ -357,9 +348,6 @@ export function useCanvasPlayer(
             return
           }
 
-          // 缓存 description 供后续分片使用
-          descriptionCache.current.set(segment.assetId, description)
-
           meta = {
             assetId: segment.assetId,
             videoUrl: segment.videoUrl,
@@ -713,7 +701,6 @@ export function useCanvasPlayer(
     frameQueueRef.current.clear()
     segmentDataRef.current.clear()
     segmentMetaRef.current = []
-    descriptionCache.current.clear()
   }, [])
 
   // ── 预加载下一个片段的数据 ──