perf: flv设置自动清除缓存

@@ -98,6 +98,9 @@ const options: VideoJsPlayerOptions & Recordable = {
       isLive: true,
       cors: true,
       withCredentials: false,
+      hasAudio: false,
+      autoCleanupSourceBuffer: true,
+      autoCleanupMaxBackwardDuration: 60,
     },
   },
 }