Merge branch 'cherry-pick-4243e916' into 'master'

perf: 调视频流转换整线程池的最大线程数

See merge request yunteng/thingskit!200

@@ -28,7 +28,7 @@ public class TkFLVServiceImpl implements TkFLVService {
     executorService =
         new ThreadPoolExecutor(
             0,
-            50,
+            2048,
             10L,
             TimeUnit.SECONDS,
             new SynchronousQueue<Runnable>(),
@@ -95,9 +95,6 @@ public class TkFLVServiceImpl implements TkFLVService {
   }
 
   public void close(String url, String browserId) {
-    //    executorService.execute(()->{
-    //
-    //    });
     String key = md5(url + browserId);
     if (converters.containsKey(key)) {
       TkConverter c = converters.get(key);