diff --git a/trunk/conf/srs.19350.conf b/trunk/conf/srs.19350.conf
index 83ee20bbb..13d32fbba 100755
--- a/trunk/conf/srs.19350.conf
+++ b/trunk/conf/srs.19350.conf
@@ -1,6 +1,6 @@
 listen              19350;
+chunk_size          65000;
 vhost __defaultVhost__ {
-	chunk_size		65000;
     enabled         on;
     gop_cache       on;
     hls {
diff --git a/trunk/conf/srs.conf b/trunk/conf/srs.conf
index 4375d4a92..6ae16e04c 100755
--- a/trunk/conf/srs.conf
+++ b/trunk/conf/srs.conf
@@ -14,18 +14,10 @@ log_dir             ./objs/logs;
 # if exceed the max connections, server will drop the new connection.
 # default: 2000
 max_connections     2000;
-# the default chunk size is 128, max is 65536,
-# some client does not support chunk size change,
-# however, most clients supports it and it can improve 
-# performance about 10%.
-# if not specified, set to 4096.
-# priority of chunk size in vhost > priority of chunk size in global.
-chunk_size		65000;
 # vhost list, the __defaultVhost__ is the default vhost
 # for example, user use ip to access the stream: rtmp://192.168.1.2/live/livestream.
 # for which cannot identify the required vhost.
 vhost __defaultVhost__ {
-	chunk_size		65000;
     enabled         on;
     gop_cache       on;
 }
@@ -160,7 +152,6 @@ vhost players_pub_rtmp {
 
 # for development
 vhost dev {
-	chunk_size		65000;
     enabled         on;
     gop_cache       on;
     queue_length    10;
@@ -181,7 +172,7 @@ vhost dev {
         on_stop         http://127.0.0.1:8085/api/v1/sessions;
     }
     transcode {
-        enabled     on;
+        enabled     off;
         ffmpeg      ./objs/ffmpeg/bin/ffmpeg;
         engine dev {
             enabled         on;
@@ -844,3 +835,4 @@ pithy_print {
     hls            3000;
 }
 
+