diff --git a/trunk/auto/auto_headers.sh b/trunk/auto/auto_headers.sh
index 2b3eb7f41..fc4f21d78 100755
--- a/trunk/auto/auto_headers.sh
+++ b/trunk/auto/auto_headers.sh
@@ -142,12 +142,6 @@ else
     srs_undefine_macro "SRS_AUTO_FFMPEG_STUB" $SRS_AUTO_HEADERS_H
 fi
 
-if [ $SRS_TRANSCODE = YES ]; then
-    srs_define_macro "SRS_AUTO_TRANSCODE" $SRS_AUTO_HEADERS_H
-else
-    srs_undefine_macro "SRS_AUTO_TRANSCODE" $SRS_AUTO_HEADERS_H
-fi
-
 if [ $SRS_INGEST = YES ]; then
     srs_define_macro "SRS_AUTO_INGEST" $SRS_AUTO_HEADERS_H
 else
diff --git a/trunk/auto/options.sh b/trunk/auto/options.sh
index 98928ebf6..cb44649e5 100755
--- a/trunk/auto/options.sh
+++ b/trunk/auto/options.sh
@@ -19,7 +19,6 @@ SRS_HDS=RESERVED
 SRS_NGINX=RESERVED
 SRS_SSL=RESERVED
 SRS_FFMPEG_TOOL=RESERVED
-SRS_TRANSCODE=RESERVED
 SRS_INGEST=RESERVED
 SRS_STAT=RESERVED
 SRS_STREAM_CASTER=RESERVED
@@ -41,6 +40,7 @@ SRS_GPERF_CP=RESERVED
 SRS_GPROF=RESERVED
 #
 # Always enable the bellow features.
+SRS_TRANSCODE=YES
 SRS_HTTP_CALLBACK=YES
 SRS_HTTP_SERVER=YES
 SRS_HTTP_API=YES
@@ -391,7 +391,6 @@ function apply_user_presets() {
         SRS_NGINX=NO
         SRS_SSL=NO
         SRS_FFMPEG_TOOL=NO
-        SRS_TRANSCODE=NO
         SRS_INGEST=NO
         SRS_STAT=NO
         SRS_STREAM_CASTER=NO
@@ -414,7 +413,6 @@ function apply_user_presets() {
         SRS_NGINX=YES
         SRS_SSL=YES
         SRS_FFMPEG_TOOL=YES
-        SRS_TRANSCODE=YES
         SRS_INGEST=YES
         SRS_STAT=YES
         SRS_STREAM_CASTER=YES
@@ -437,7 +435,6 @@ function apply_user_presets() {
         SRS_NGINX=NO
         SRS_SSL=NO
         SRS_FFMPEG_TOOL=NO
-        SRS_TRANSCODE=NO
         SRS_INGEST=NO
         SRS_STAT=NO
         SRS_STREAM_CASTER=NO
@@ -460,7 +457,6 @@ function apply_user_presets() {
         SRS_NGINX=NO
         SRS_SSL=YES
         SRS_FFMPEG_TOOL=NO
-        SRS_TRANSCODE=NO
         SRS_INGEST=NO
         SRS_STAT=NO
         SRS_STREAM_CASTER=NO
@@ -483,7 +479,6 @@ function apply_user_presets() {
         SRS_NGINX=NO
         SRS_SSL=YES
         SRS_FFMPEG_TOOL=NO
-        SRS_TRANSCODE=YES
         SRS_INGEST=YES
         SRS_STAT=YES
         SRS_STREAM_CASTER=YES
@@ -507,7 +502,6 @@ function apply_user_presets() {
         SRS_NGINX=NO
         SRS_SSL=YES
         SRS_FFMPEG_TOOL=NO
-        SRS_TRANSCODE=YES
         SRS_INGEST=YES
         SRS_STAT=YES
         SRS_STREAM_CASTER=YES
@@ -530,7 +524,6 @@ function apply_user_presets() {
         SRS_NGINX=NO
         SRS_SSL=YES
         SRS_FFMPEG_TOOL=NO
-        SRS_TRANSCODE=YES
         SRS_INGEST=YES
         SRS_STAT=YES
         SRS_STREAM_CASTER=YES
@@ -553,7 +546,6 @@ function apply_user_presets() {
         SRS_NGINX=NO
         SRS_SSL=YES
         SRS_FFMPEG_TOOL=NO
-        SRS_TRANSCODE=YES
         SRS_INGEST=YES
         SRS_STAT=YES
         SRS_STREAM_CASTER=YES
@@ -579,7 +571,6 @@ function apply_user_presets() {
         SRS_NGINX=NO
         SRS_SSL=YES
         SRS_FFMPEG_TOOL=YES
-        SRS_TRANSCODE=YES
         SRS_INGEST=YES
         SRS_STAT=YES
         SRS_STREAM_CASTER=YES
@@ -602,7 +593,6 @@ function apply_user_presets() {
         SRS_NGINX=NO
         SRS_SSL=YES
         SRS_FFMPEG_TOOL=NO
-        SRS_TRANSCODE=YES
         SRS_INGEST=YES
         SRS_STAT=YES
         SRS_STREAM_CASTER=YES
@@ -625,7 +615,6 @@ function apply_user_presets() {
         SRS_NGINX=NO
         SRS_SSL=YES
         SRS_FFMPEG_TOOL=YES
-        SRS_TRANSCODE=YES
         SRS_INGEST=YES
         SRS_STAT=YES
         SRS_STREAM_CASTER=YES
@@ -648,7 +637,6 @@ function apply_user_presets() {
         SRS_NGINX=NO
         SRS_SSL=YES
         SRS_FFMPEG_TOOL=NO
-        SRS_TRANSCODE=YES
         SRS_INGEST=YES
         SRS_STAT=YES
         SRS_STREAM_CASTER=YES
@@ -671,7 +659,6 @@ function apply_user_presets() {
         SRS_NGINX=NO
         SRS_SSL=YES
         SRS_FFMPEG_TOOL=YES
-        SRS_TRANSCODE=YES
         SRS_INGEST=YES
         SRS_STAT=YES
         SRS_STREAM_CASTER=NO
@@ -707,6 +694,7 @@ function apply_user_detail_options() {
 
     # Always enable HTTP utilies.
     if [ $SRS_HTTP_CORE = NO ]; then SRS_HTTP_CORE=YES; echo -e "${YELLOW}[WARN] Always enable HTTP utilies.${BLACK}"; fi
+    if [ $SRS_TRANSCODE = NO ]; then SRS_TRANSCODE=YES; echo -e "${YELLOW}[WARN] Always enable Transcode.${BLACK}"; fi
     if [ $SRS_HTTP_CALLBACK = NO ]; then SRS_HTTP_CALLBACK=YES; echo -e "${YELLOW}[WARN] Always enable HTTP callback.${BLACK}"; fi
     if [ $SRS_HTTP_SERVER = NO ]; then SRS_HTTP_SERVER=YES; echo -e "${YELLOW}[WARN] Always enable HTTP server.${BLACK}"; fi
     if [ $SRS_HTTP_API = NO ]; then SRS_HTTP_API=YES; echo -e "${YELLOW}[WARN] Always enable HTTP API.${BLACK}"; fi
@@ -732,6 +720,7 @@ function apply_user_detail_options() {
         SRS_SSL=NO
         SRS_FFMPEG_TOOL=NO
         SRS_TRANSCODE=NO
+        SRS_HTTP_CALLBACK=NO
         SRS_INGEST=NO
         SRS_STAT=NO
         SRS_STREAM_CASTER=NO
diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index 32abb188a..7a5b5a4fd 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -3895,11 +3895,6 @@ srs_error_t SrsConfig::check_normal_config()
         if (get_hls_enabled(vhost->arg0())) {
             srs_warn("can't enable vhost.hls of %s", vhost->arg0().c_str());
         }
-#ifndef SRS_AUTO_TRANSCODE
-        if (get_transcode_enabled(get_transcode(vhost->arg0(), ""))) {
-            srs_warn("can't enable vhost.transcode of %s", vhost->arg0().c_str());
-        }
-#endif
 #ifndef SRS_AUTO_INGEST
         vector<SrsConfDirective*> ingesters = get_ingesters(vhost->arg0());
         for (int j = 0; j < (int)ingesters.size(); j++) {
diff --git a/trunk/src/app/srs_app_encoder.cpp b/trunk/src/app/srs_app_encoder.cpp
index 00370f93b..2a0d101ce 100644
--- a/trunk/src/app/srs_app_encoder.cpp
+++ b/trunk/src/app/srs_app_encoder.cpp
@@ -34,8 +34,6 @@ using namespace std;
 #include <srs_app_ffmpeg.hpp>
 #include <srs_kernel_utility.hpp>
 
-#ifdef SRS_AUTO_TRANSCODE
-
 // for encoder to detect the dead loop
 static std::vector<std::string> _transcoded_url;
 
@@ -334,6 +332,3 @@ void SrsEncoder::show_encode_log_message()
     }
 }
 
-#endif
-
-
diff --git a/trunk/src/app/srs_app_encoder.hpp b/trunk/src/app/srs_app_encoder.hpp
index b8ebede58..9995e93f2 100644
--- a/trunk/src/app/srs_app_encoder.hpp
+++ b/trunk/src/app/srs_app_encoder.hpp
@@ -26,8 +26,6 @@
 
 #include <srs_core.hpp>
 
-#ifdef SRS_AUTO_TRANSCODE
-
 #include <string>
 #include <vector>
 
@@ -72,5 +70,3 @@ private:
 
 #endif
 
-#endif
-
diff --git a/trunk/src/app/srs_app_http_api.cpp b/trunk/src/app/srs_app_http_api.cpp
index 9f0389826..a86c5802c 100644
--- a/trunk/src/app/srs_app_http_api.cpp
+++ b/trunk/src/app/srs_app_http_api.cpp
@@ -603,11 +603,7 @@ srs_error_t SrsGoApiFeatures::serve_http(ISrsHttpResponseWriter* w, ISrsHttpMess
     features->set("api", SrsJsonAny::boolean(true));
     features->set("httpd", SrsJsonAny::boolean(true));
     features->set("dvr", SrsJsonAny::boolean(true));
-#ifdef SRS_AUTO_TRANSCODE
     features->set("transcode", SrsJsonAny::boolean(true));
-#else
-    features->set("transcode", SrsJsonAny::boolean(false));
-#endif
 #ifdef SRS_AUTO_INGEST
     features->set("ingest", SrsJsonAny::boolean(true));
 #else
diff --git a/trunk/src/app/srs_app_source.cpp b/trunk/src/app/srs_app_source.cpp
index fb47c6d61..c81696875 100755
--- a/trunk/src/app/srs_app_source.cpp
+++ b/trunk/src/app/srs_app_source.cpp
@@ -824,9 +824,7 @@ SrsOriginHub::SrsOriginHub()
     hls = new SrsHls();
     dash = new SrsDash();
     dvr = new SrsDvr();
-#ifdef SRS_AUTO_TRANSCODE
     encoder = new SrsEncoder();
-#endif
 #ifdef SRS_AUTO_HDS
     hds = new SrsHds();
 #endif
@@ -854,9 +852,7 @@ SrsOriginHub::~SrsOriginHub()
     srs_freep(hls);
     srs_freep(dash);
     srs_freep(dvr);
-#ifdef SRS_AUTO_TRANSCODE
     srs_freep(encoder);
-#endif
 #ifdef SRS_AUTO_HDS
     srs_freep(hds);
 #endif
@@ -1116,11 +1112,9 @@ srs_error_t SrsOriginHub::on_publish()
     }
     
     // TODO: FIXME: use initialize to set req.
-#ifdef SRS_AUTO_TRANSCODE
     if ((err = encoder->on_publish(req)) != srs_success) {
         return srs_error_wrap(err, "encoder publish");
     }
-#endif
     
     if ((err = hls->on_publish()) != srs_success) {
         return srs_error_wrap(err, "hls publish");
@@ -1158,10 +1152,7 @@ void SrsOriginHub::on_unpublish()
     // destroy all forwarders
     destroy_forwarders();
     
-#ifdef SRS_AUTO_TRANSCODE
     encoder->on_unpublish();
-#endif
-    
     hls->on_unpublish();
     dash->on_unpublish();
     dvr->on_unpublish();
@@ -1419,7 +1410,6 @@ srs_error_t SrsOriginHub::on_reload_vhost_transcode(string vhost)
     
     // TODO: FIXME: maybe should ignore when publish already stopped?
     
-#ifdef SRS_AUTO_TRANSCODE
     encoder->on_unpublish();
     
     // Don't start transcode when source is not active.
@@ -1431,7 +1421,6 @@ srs_error_t SrsOriginHub::on_reload_vhost_transcode(string vhost)
         return srs_error_wrap(err, "start encoder failed");
     }
     srs_trace("vhost %s transcode reload success", vhost.c_str());
-#endif
     
     return err;
 }
diff --git a/trunk/src/app/srs_app_source.hpp b/trunk/src/app/srs_app_source.hpp
index 9fd8dcea8..e19105d01 100644
--- a/trunk/src/app/srs_app_source.hpp
+++ b/trunk/src/app/srs_app_source.hpp
@@ -55,9 +55,7 @@ class SrsMessageHeader;
 class SrsHls;
 class SrsDvr;
 class SrsDash;
-#ifdef SRS_AUTO_TRANSCODE
 class SrsEncoder;
-#endif
 class SrsBuffer;
 #ifdef SRS_AUTO_HDS
 class SrsHds;
@@ -428,9 +426,7 @@ private:
     // dvr handler.
     SrsDvr* dvr;
     // transcoding handler.
-#ifdef SRS_AUTO_TRANSCODE
     SrsEncoder* encoder;
-#endif
 #ifdef SRS_AUTO_HDS
     // adobe hds(http dynamic streaming).
     SrsHds *hds;
diff --git a/trunk/src/main/srs_main_server.cpp b/trunk/src/main/srs_main_server.cpp
index ca9b5dd43..2f03198be 100644
--- a/trunk/src/main/srs_main_server.cpp
+++ b/trunk/src/main/srs_main_server.cpp
@@ -226,7 +226,7 @@ void show_macro_features()
         ss << ", hp:" << srs_bool2switch(true);
         ss << ", dvr:" << srs_bool2switch(SRS_AUTO_DVR_BOOL);
         // trans(transcode)
-        ss << ", trans:" << srs_bool2switch(SRS_AUTO_TRANSCODE_BOOL);
+        ss << ", trans:" << srs_bool2switch(true);
         // inge(ingest)
         ss << ", inge:" << srs_bool2switch(SRS_AUTO_INGEST_BOOL);
         ss << ", kafka:" << srs_bool2switch(SRS_AUTO_KAFKA_BOOL);