change server name to demo, dev used for development vhost

@@ -42,33 +42,33 @@ For example, use ffmpeg to publish:
         sleep 1; \
     done
 </pre>
-step 6: add server ip to hosts as dev. <br/>
+step 6: add server ip to hosts as demo. <br/>
 <pre>
 # edit the folowing file:
 # linux: /etc/hosts
 # windows: C:\Windows\System32\drivers\etc\hosts
-192.168.2.111 dev 
+192.168.2.111 demo 
 </pre>
 step 7: play live stream. <br/>
 <pre>
-rtmp url: rtmp://dev:1935/live/livestream
-m3u8 url: http://dev:80/live/livestream.m3u8
+rtmp url: rtmp://demo:1935/live/livestream
+m3u8 url: http://demo:80/live/livestream.m3u8
 </pre>
 step 8: play live stream auto transcoded<br/>
 <pre>
-rtmp url: rtmp://dev:1935/live/livestream_ld
-m3u8 url: http://dev:80/live/livestream_ld.m3u8
-rtmp url: rtmp://dev:1935/live/livestream_sd
-m3u8 url: http://dev:80/live/livestream_sd.m3u8
+rtmp url: rtmp://demo:1935/live/livestream_ld
+m3u8 url: http://demo:80/live/livestream_ld.m3u8
+rtmp url: rtmp://demo:1935/live/livestream_sd
+m3u8 url: http://demo:80/live/livestream_sd.m3u8
 </pre>
 step 9: play live stream auto forwarded, the hls dir change to /forward<br/>
 <pre>
-rtmp url: rtmp://dev:19350/live/livestream
-m3u8 url: http://dev:80/forward/live/livestream.m3u8
-rtmp url: rtmp://dev:19350/live/livestream_ld
-m3u8 url: http://dev:80/forward/live/livestream_ld.m3u8
-rtmp url: rtmp://dev:19350/live/livestream_sd
-m3u8 url: http://dev:80/forward/live/livestream_sd.m3u8
+rtmp url: rtmp://demo:19350/live/livestream
+m3u8 url: http://demo:80/forward/live/livestream.m3u8
+rtmp url: rtmp://demo:19350/live/livestream_ld
+m3u8 url: http://demo:80/forward/live/livestream_ld.m3u8
+rtmp url: rtmp://demo:19350/live/livestream_sd
+m3u8 url: http://demo:80/forward/live/livestream_sd.m3u8
 </pre>
 
 ### System Requirements

@@ -8,6 +8,7 @@ listen              1935;
 chunk_size          65000;
 # vhost list, the __defaultVhost__ is the default vhost
 # for which cannot identify the required vhost.
+# for default demo.
 vhost __defaultVhost__ {
     enabled         on;
     gop_cache       on;
@@ -15,7 +16,7 @@ vhost __defaultVhost__ {
     hls_path        ./objs/nginx/html;
     hls_fragment    5;
     hls_window      30;
-    #forward         127.0.0.1:19350;
+    forward         127.0.0.1:19350;
     transcode {
         enabled     on;
         ffmpeg      ./objs/ffmpeg/bin/ffmpeg;
@@ -68,6 +69,42 @@ vhost __defaultVhost__ {
         }
     }
 }
+# for development
+vhost dev {
+    enabled         on;
+    gop_cache       on;
+    hls             on;
+    hls_path        ./objs/nginx/html;
+    hls_fragment    5;
+    hls_window      30;
+    forward         dev:19350;
+    transcode {
+        enabled     on;
+        ffmpeg      ./objs/ffmpeg/bin/ffmpeg;
+        engine dev{
+            enabled         on;
+            vfilter {
+            }
+            vcodec          libx264;
+            vbitrate        300;
+            vfps            20;
+            vwidth          768;
+            vheight         320;
+            vthreads        1;
+            vprofile        baseline;
+            vpreset         superfast;
+            vparams {
+            }
+            acodec          libaacplus;
+            abitrate        30;
+            asample_rate    44100;
+            achannels       2;
+            aparams {
+            }
+            output          rtmp://[vhost]:[port]/[app]/[stream]_dev;
+        }
+    }
+}
 # the mirror filter of ffmpeg, @see: http://ffmpeg.org/ffmpeg-filters.html#Filtering-Introduction
 vhost mirror.transcode.vhost.com {
     transcode {