diff --git a/trunk/auto/depends.sh b/trunk/auto/depends.sh
index b7f6f2e71..ec4d03cc5 100755
--- a/trunk/auto/depends.sh
+++ b/trunk/auto/depends.sh
@@ -510,6 +510,12 @@ else
     echo "#undef SRS_FFMPEG" >> $SRS_AUTO_HEADERS_H
 fi
 
+if [ $SRS_TRANSCODE = YES ]; then
+    echo "#define SRS_TRANSCODE" >> $SRS_AUTO_HEADERS_H
+else
+    echo "#undef SRS_TRANSCODE" >> $SRS_AUTO_HEADERS_H
+fi
+
 #####################################################################################
 # build research code
 #####################################################################################
diff --git a/trunk/auto/options.sh b/trunk/auto/options.sh
index d0f2a3855..6b100d1bb 100755
--- a/trunk/auto/options.sh
+++ b/trunk/auto/options.sh
@@ -76,6 +76,7 @@ do
         --with-hls)                     SRS_HLS=YES                 ;;
         --with-nginx)                   SRS_NGINX=YES               ;;
         --with-ffmpeg)                  SRS_FFMPEG=YES              ;;
+        --with-transcode)               SRS_TRANSCODE=YES           ;;
         --with-http-callback)           SRS_HTTP_CALLBACK=YES       ;;
         --with-http-server)             SRS_HTTP_SERVER=YES         ;;
         --with-http-api)                SRS_HTTP_API=YES            ;;
@@ -94,6 +95,7 @@ do
         --without-hls)                  SRS_HLS=NO                  ;;
         --without-nginx)                SRS_NGINX=NO                ;;
         --without-ffmpeg)               SRS_FFMPEG=NO               ;;
+        --without-transcode)            SRS_TRANSCODE=NO            ;;
         --without-http-callback)        SRS_HTTP_CALLBACK=NO        ;;
         --without-http-server)          SRS_HTTP_SERVER=NO          ;;
         --without-http-api)             SRS_HTTP_API=NO             ;;
@@ -132,6 +134,7 @@ if [ $SRS_ARM_UBUNTU12 = YES ]; then
     if [ $SRS_NGINX = RESERVED ]; then SRS_NGINX=NO; fi
     if [ $SRS_SSL = RESERVED ]; then SRS_SSL=YES; fi
     if [ $SRS_FFMPEG = RESERVED ]; then SRS_FFMPEG=NO; fi
+    if [ $SRS_TRANSCODE = RESERVED ]; then SRS_TRANSCODE=NO; fi
     if [ $SRS_HTTP_CALLBACK = RESERVED ]; then SRS_HTTP_CALLBACK=NO; fi
     if [ $SRS_HTTP_SERVER = RESERVED ]; then SRS_HTTP_SERVER=YES; fi
     if [ $SRS_HTTP_API = RESERVED ]; then SRS_HTTP_API=YES; fi
@@ -154,6 +157,7 @@ else
     if [ $SRS_NGINX = RESERVED ]; then SRS_NGINX=NO; fi
     if [ $SRS_SSL = RESERVED ]; then SRS_SSL=YES; fi
     if [ $SRS_FFMPEG = RESERVED ]; then SRS_FFMPEG=NO; fi
+    if [ $SRS_TRANSCODE = RESERVED ]; then SRS_TRANSCODE=NO; fi
     if [ $SRS_HTTP_CALLBACK = RESERVED ]; then SRS_HTTP_CALLBACK=NO; fi
     if [ $SRS_HTTP_SERVER = RESERVED ]; then SRS_HTTP_SERVER=YES; fi
     if [ $SRS_HTTP_API = RESERVED ]; then SRS_HTTP_API=YES; fi
@@ -178,6 +182,7 @@ if [ $SRS_DEV = YES ]; then
     SRS_NGINX=NO
     SRS_SSL=YES
     SRS_FFMPEG=YES
+    SRS_TRANSCODE=YES
     SRS_HTTP_CALLBACK=YES
     SRS_HTTP_SERVER=YES
     SRS_HTTP_API=YES
@@ -201,6 +206,7 @@ if [ $SRS_PI = YES ]; then
     SRS_NGINX=NO
     SRS_SSL=YES
     if [ $SRS_FFMPEG = RESERVED ]; then SRS_FFMPEG=NO; fi
+    if [ $SRS_TRANSCODE = RESERVED ]; then SRS_TRANSCODE=NO; fi
     SRS_HTTP_CALLBACK=NO
     SRS_HTTP_SERVER=YES
     SRS_HTTP_API=YES
@@ -223,6 +229,9 @@ if [ $SRS_HTTP_CALLBACK = YES ]; then SRS_HTTP_PARSER=YES; fi
 if [ $SRS_HTTP_SERVER = YES ]; then SRS_HTTP_PARSER=YES; fi
 if [ $SRS_HTTP_API = YES ]; then SRS_HTTP_PARSER=YES; fi
 
+# if transcode specified, try ffmpeg if possible.
+if [ $SRS_TRANSCODE = YES ]; then if [ $SRS_FFMPEG = RESERVED ]; then SRS_FFMPEG=YES; fi fi
+
 # parse the jobs for make
 if [[ "" -eq SRS_JOBS ]]; then 
     export SRS_JOBS="--jobs" 
@@ -249,8 +258,10 @@ if [ $help = yes ]; then
   --with-http-callback      enable http hooks, build cherrypy as demo api server.
   --with-http-server        enable http server to delivery http stream.
   --with-http-api           enable http api, to manage SRS by http api.
-  --with-ffmpeg             enable transcoding with ffmpeg.
+  --with-ffmpeg             enable transcoding tool ffmpeg.
                             build ffmpeg at: ./objs/ffmpeg/bin/ffmpeg
+  --with-transcode          enable transcoding features.
+                            user must specifies the transcode tools in conf.
   --with-librtmp            enable srs-librtmp, library for client.
   --with-bwtc               enable SRS bandwidth test client tool.
   --with-research           build the research tools.
@@ -268,7 +279,8 @@ if [ $help = yes ]; then
   --without-http-callback   disable http, http hooks callback.
   --without-http-server     disable http server, use external server to delivery http stream.
   --without-http-api        disable http api, only use console to manage SRS process.
-  --without-ffmpeg          disable the ffmpeg transcoding feature.
+  --without-ffmpeg          disable the ffmpeg transcode tool feature.
+  --without-transcode       disable the transcoding feature.
   --without-librtmp         disable srs-librtmp, library for client.
   --without-bwtc            disable SRS bandwidth test client tool.
   --without-research        do not build the research tools.
@@ -364,6 +376,7 @@ if [ $SRS_HLS = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-hls"; else SR
 if [ $SRS_NGINX = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-nginx"; else SRS_CONFIGURE="${SRS_CONFIGURE} --without-nginx"; fi
 if [ $SRS_SSL = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-ssl"; else SRS_CONFIGURE="${SRS_CONFIGURE} --without-ssl"; fi
 if [ $SRS_FFMPEG = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-ffmpeg"; else SRS_CONFIGURE="${SRS_CONFIGURE} --without-ffmpeg"; fi
+if [ $SRS_TRANSCODE = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-transcode"; else SRS_CONFIGURE="${SRS_CONFIGURE} --without-transcode"; fi
 if [ $SRS_HTTP_CALLBACK = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-http-callback"; else SRS_CONFIGURE="${SRS_CONFIGURE} --without-http-callback"; fi
 if [ $SRS_HTTP_SERVER = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-http-server"; else SRS_CONFIGURE="${SRS_CONFIGURE} --without-http-server"; fi
 if [ $SRS_HTTP_API = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-http-api"; else SRS_CONFIGURE="${SRS_CONFIGURE} --without-http-api"; fi
diff --git a/trunk/configure b/trunk/configure
index 3edb26b84..be24e858e 100755
--- a/trunk/configure
+++ b/trunk/configure
@@ -82,9 +82,10 @@ if [ $SRS_UTEST = YES ]; then SrsUtestMakeEntry="(cd ${SRS_OBJS}/utest; \$(MAKE)
 #####################################################################################
 # colorful summary
 SrsHlsSummaryColor="\${YELLOW}{disabled} "; if [ $SRS_HLS = YES ]; then SrsHlsSummaryColor="\${GREEN}"; fi
-SrsNginxSummaryColor="\${YELLOW}{disabled} "; if [ $SRS_NGINX = YES ]; then SrsNginxSummaryColor="\${GREEN}"; fi
+SrsNginxSummaryColor="\${GREEN}{disabled} "; if [ $SRS_NGINX = YES ]; then SrsNginxSummaryColor="\${GREEN}"; fi
 SrsSslSummaryColor="\${YELLOW}{disabled} "; if [ $SRS_SSL = YES ]; then SrsSslSummaryColor="\${GREEN}"; fi
 SrsFfmpegSummaryColor="\${YELLOW}{disabled} "; if [ $SRS_FFMPEG = YES ]; then SrsFfmpegSummaryColor="\${GREEN}"; fi
+SrsTranscodeSummaryColor="\${YELLOW}{disabled} "; if [ $SRS_TRANSCODE = YES ]; then SrsTranscodeSummaryColor="\${GREEN}"; fi
 SrsHttpCallbackSummaryColor="\${YELLOW}{disabled} "; if [ $SRS_HTTP_CALLBACK = YES ]; then SrsHttpCallbackSummaryColor="\${GREEN}"; fi
 SrsHttpServerSummaryColor="\${YELLOW}{disabled} "; if [ $SRS_HTTP_SERVER = YES ]; then SrsHttpServerSummaryColor="\${GREEN}"; fi
 SrsHttpApiSummaryColor="\${YELLOW}{disabled} "; if [ $SRS_HTTP_API = YES ]; then SrsHttpApiSummaryColor="\${GREEN}"; fi
@@ -152,7 +153,9 @@ echo -e "     |     ${SrsNginxSummaryColor}nginx: delivery HLS stream by nginx\$
 echo -e "     |     ${SrsSslSummaryColor}ssl @see: https://github.com/winlinvip/simple-rtmp-server/wiki/RTMPHandshake\${BLACK}"
 echo -e "     |     ${SrsSslSummaryColor}ssl: support RTMP complex handshake for client required, for instance, flash\${BLACK}"
 echo -e "     |     ${SrsFfmpegSummaryColor}ffmpeg @see: https://github.com/winlinvip/simple-rtmp-server/wiki/FFMPEG\${BLACK}"
-echo -e "     |     ${SrsFfmpegSummaryColor}ffmpeg: support transcoding RTMP stream with FFMPEG\${BLACK}"
+echo -e "     |     ${SrsFfmpegSummaryColor}ffmpeg: transcode, mux, ingest tool\${BLACK}"
+echo -e "     |     ${SrsTranscodeSummaryColor}transcode @see: https://github.com/winlinvip/simple-rtmp-server/wiki/FFMPEG\${BLACK}"
+echo -e "     |     ${SrsTranscodeSummaryColor}transcode: support transcoding RTMP stream\${BLACK}"
 echo -e "     |     ${SrsHttpCallbackSummaryColor}http-callback @see: https://github.com/winlinvip/simple-rtmp-server/wiki/HTTPCallback\${BLACK}"
 echo -e "     |     ${SrsHttpCallbackSummaryColor}http-callback: support http callback for authentication and event injection\${BLACK}"
 echo -e "     |     ${SrsHttpServerSummaryColor}http-server @see: https://github.com/winlinvip/simple-rtmp-server/wiki/HTTPServer\${BLACK}"
diff --git a/trunk/scripts/_step.build.sh b/trunk/scripts/_step.build.sh
index 6a41958a6..6a06ce19e 100755
--- a/trunk/scripts/_step.build.sh
+++ b/trunk/scripts/_step.build.sh
@@ -3,7 +3,7 @@ src_dir='src'
 if [[ ! -d $src_dir ]]; then echo "错误：必须在src同目录执行脚本"; exit 1; fi
 
 echo "编译SRS"
-./configure --with-ssl --with-hls --with-http-server --with-ffmpeg --with-http-callback && make
+./configure --with-ssl --with-hls --with-http-server --with-ffmpeg --with-transcode --with-http-callback && make
 ret=$?; if [[ 0 -ne $ret ]]; then echo "错误：编译SRS失败"; exit $ret; fi
 
 echo "编译SRS成功"
diff --git a/trunk/src/app/srs_app_encoder.cpp b/trunk/src/app/srs_app_encoder.cpp
index 9ba2f566c..6b77165b2 100644
--- a/trunk/src/app/srs_app_encoder.cpp
+++ b/trunk/src/app/srs_app_encoder.cpp
@@ -39,7 +39,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_app_pithy_print.hpp>
 #include <srs_protocol_rtmp_stack.hpp>
 
-#ifdef SRS_FFMPEG
+#ifdef SRS_TRANSCODE
 
 #define SRS_ENCODER_COPY    "copy"
 #define SRS_ENCODER_NO_VIDEO    "vn"
diff --git a/trunk/src/app/srs_app_encoder.hpp b/trunk/src/app/srs_app_encoder.hpp
index 0f1502dea..02090edba 100644
--- a/trunk/src/app/srs_app_encoder.hpp
+++ b/trunk/src/app/srs_app_encoder.hpp
@@ -29,6 +29,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 #include <srs_core.hpp>
 
+#ifdef SRS_TRANSCODE
+
 #include <string>
 #include <vector>
 
@@ -38,8 +40,6 @@ class SrsConfDirective;
 class SrsRequest;
 class SrsPithyPrint;
 
-#ifdef SRS_FFMPEG
-
 /**
 * a transcode engine: ffmepg,
 * used to transcode a stream to another.
diff --git a/trunk/src/app/srs_app_source.cpp b/trunk/src/app/srs_app_source.cpp
index 7df605e4d..25db3734a 100644
--- a/trunk/src/app/srs_app_source.cpp
+++ b/trunk/src/app/srs_app_source.cpp
@@ -431,7 +431,7 @@ SrsSource::SrsSource(SrsRequest* _req)
 #ifdef SRS_HLS
     hls = new SrsHls(this);
 #endif
-#ifdef SRS_FFMPEG
+#ifdef SRS_TRANSCODE
     encoder = new SrsEncoder();
 #endif
     
@@ -477,7 +477,7 @@ SrsSource::~SrsSource()
 #ifdef SRS_HLS
     srs_freep(hls);
 #endif
-#ifdef SRS_FFMPEG
+#ifdef SRS_TRANSCODE
     srs_freep(encoder);
 #endif
 
@@ -586,7 +586,7 @@ int SrsSource::on_reload_transcode(string vhost)
         return ret;
     }
     
-#ifdef SRS_FFMPEG
+#ifdef SRS_TRANSCODE
     encoder->on_unpublish();
     if ((ret = encoder->on_publish(req)) != ERROR_SUCCESS) {
         srs_error("start encoder failed. ret=%d", ret);
@@ -900,7 +900,7 @@ int SrsSource::on_publish(SrsRequest* _req)
         return ret;
     }
     
-#ifdef SRS_FFMPEG
+#ifdef SRS_TRANSCODE
     if ((ret = encoder->on_publish(req)) != ERROR_SUCCESS) {
         srs_error("start encoder failed. ret=%d", ret);
         return ret;
@@ -922,7 +922,7 @@ void SrsSource::on_unpublish()
     // destroy all forwarders
     destroy_forwarders();
 
-#ifdef SRS_FFMPEG
+#ifdef SRS_TRANSCODE
     encoder->on_unpublish();
 #endif
 
diff --git a/trunk/src/app/srs_app_source.hpp b/trunk/src/app/srs_app_source.hpp
index 0e3bdb4a1..2f5490643 100644
--- a/trunk/src/app/srs_app_source.hpp
+++ b/trunk/src/app/srs_app_source.hpp
@@ -46,7 +46,7 @@ class SrsRequest;
 #ifdef SRS_HLS
 class SrsHls;
 #endif
-#ifdef SRS_FFMPEG
+#ifdef SRS_TRANSCODE
 class SrsEncoder;
 #endif
 
@@ -224,7 +224,7 @@ private:
     SrsHls* hls;
 #endif
     // transcoding handler.
-#ifdef SRS_FFMPEG
+#ifdef SRS_TRANSCODE
     SrsEncoder* encoder;
 #endif
     // gop cache for client fast startup.