[misc] fix a double free bug and update README files.

Author: winshining

README.CN.md

@@ -26,6 +26,10 @@
 
 * [VLC](http://www.videolan.org) (RTMP & HTTP-FLV)/[OBS](https://obsproject.com) (RTMP & HTTP-FLV)/[JW Player](https://www.jwplayer.com) (RTMP)/[flv.js](https://github.com/Bilibili/flv.js) (HTTP-FLV).
 
+## 注意
+
+[flv.js](https://github/com/Bilibili/flv.js)只能运行在支持[Media Source Extensions](https://www.w3.org/TR/media-source)的浏览器上。
+
 # 依赖
 
 * 在类Unix系统上，需要GNU make，用于调用编译器来编译软件。
@@ -162,6 +166,16 @@ nginx-http-flv-module包含了[nginx-rtmp-module](https://github.com/arut/nginx-
 
     http://example.com[:port]/dir/streamname.mpd
 
+# 示例图片
+
+## RTMP ([JW Player](https://www.jwplayer.com)) & HTTP-FLV ([VLC](http://www.videolan.org))
+
+![RTMP & HTTP-FLV](samples/jwplayer_vlc.png)
+
+## HTTP-FLV ([flv.js](https://github.com/Bilibili/flv.js))
+
+![HTTP-FLV](samples/flv.js.png)
+
 # nginx-http-flv-module的安装包
 
 详情见[nginx-http-flv-module-packages](https://github.com/winshining/nginx-http-flv-module-packages)。

README.md

@@ -26,6 +26,10 @@ Media streaming server based on [nginx-rtmp-module](https://github.com/arut/ngin
 
 * [VLC](http://www.videolan.org) (RTMP & HTTP-FLV)/[OBS](https://obsproject.com) (RTMP & HTTP-FLV)/[JW Player](https://www.jwplayer.com) (RTMP)/[flv.js](https://github.com/Bilibili/flv.js) (HTTP-FLV).
 
+## Note
+
+[flv.js](https://github.com/Bilibili/flv.js) can only run with browsers that support [Media Source Extensions](https://www.w3.org/TR/media-source).
+
 # Prerequisites
 
 * GNU make for activating compiler on Unix-like systems to compile software.
@@ -162,6 +166,16 @@ Since some players don't support HTTP chunked transmission, it's better to speci
 
     http://example.com[:port]/dir/streamname.mpd
 
+# Sample Pictures
+
+## RTMP ([JW Player](https://www.jwplayer.com)) & HTTP-FLV ([VLC](http://www.videolan.org))
+
+![RTMP & HTTP-FLV](samples/jwplayer_vlc.png)
+
+## HTTP-FLV ([flv.js](https://github.com/Bilibili/flv.js))
+
+![HTTP-FLV](samples/flv.js.png)
+
 # Packages for nginx-http-flv-module
 
 Please refer to [nginx-http-flv-module-packages](https://github.com/winshining/nginx-http-flv-module-packages).

ngx_rtmp_gop_cache_module.c

@@ -687,11 +687,6 @@ ngx_rtmp_gop_cache_send(ngx_rtmp_session_t *s)
             cs->timestamp += delta;
             s->current_time = cs->timestamp;
 
-            if (meta) {
-                handler->free_message_pt(s, meta);
-                meta = NULL;
-            }
-
             if (pkt) {
                 handler->free_message_pt(s, pkt);
                 pkt = NULL;