ver: 2.0+ r3538 9354d4a9 2017-06-08 09:13:30

support build-in speex to aac transcoding,add root config: speex2aac
    support set cup affinity,add root config:cpu_affinity

@@ -62,6 +62,12 @@ work_dir ./;
 # @reamrk do not support reload.
 # default: off
 asprocess off;
+# whether use build-in speex to aac transcoding
+# default: off
+speex2aac off;
+# set cpu affinity,the index of the cpu core,0,1,2,...
+# default -1,don't set affinity
+cpu_affinity -1;
 
 #############################################################################################
 # heartbeat/stats sections
@@ -928,6 +934,16 @@ vhost same.vhost.forward.srs.com {
     # active-active for cdn to build high available fault tolerance system.
     # format: {ip}:{port} {ip_N}:{port_N}
     forward         127.0.0.1:1936 127.0.0.1:1937;
+    # forward_in_turn all publish stream to the specified server in turn.
+    # this used to split/forward the current stream for transcode and make load balance  
+    # active-active for cdn to build high available fault tolerance system.
+    # format: {ip}:{port} {ip_N}:{port_N}
+    forward_in_turn         127.0.0.1:19351 127.0.0.1:19352;
+    #if the forward server is same as this server , a origin,try use forward_peer,
+    #the stream pushed from other forward peer will not forward any more in this server
+    forward_peer 127.0.0.1:1936;
+    #list out the servers which is not srs ,used in forward or forward_in_turn,and forward_peer for example,forward to some CDN
+    forward_server_other    127.0.0.1:19351;
 }
 
 # the main comments for transcode