diff --git a/README.md b/README.md
index d45fecb37..8a54613bb 100755
--- a/README.md
+++ b/README.md
@@ -145,6 +145,7 @@ For previous versions, please read:
 
 ## V3 changes
 
+* v3.0, 2020-10-23, Allow FFmpeg if exists at /usr/local/bin/ffmpeg. 3.0.147
 * v3.0, 2020-10-23, Refine build script, use libssl in docker. 3.0.146
 * v3.0, 2020-10-14, Fix [#1987][bug #1987], Fix Kbps resample bug. 3.0.145
 * <strong>v3.0, 2020-10-10, [3.0 release1(3.0.144)][r3.0r1] released. 122674 lines.</strong>
diff --git a/trunk/auto/depends.sh b/trunk/auto/depends.sh
index 3e3500681..4c3e642cd 100755
--- a/trunk/auto/depends.sh
+++ b/trunk/auto/depends.sh
@@ -484,7 +484,7 @@ fi
 # live transcoding, ffmpeg-4.1, x264-core157, lame-3.99.5, libaacplus-2.0.2.
 #####################################################################################
 # Always link the ffmpeg tools if exists.
-if [[ -f /usr/local/bin/ffmpeg && ! -f ${SRS_OBJS}/ffmpeg/bin/ffmpeg ]]; then
+if [[ -f /usr/local/bin/ffmpeg && ! -f ${SRS_OBJS}/${SRS_PLATFORM}/ffmpeg ]]; then
     mkdir -p ${SRS_OBJS}/${SRS_PLATFORM}/ffmpeg/bin &&
     ln -sf /usr/local/bin/ffmpeg ${SRS_OBJS}/${SRS_PLATFORM}/ffmpeg/bin/ffmpeg &&
     (cd ${SRS_OBJS} && rm -rf ffmpeg && ln -sf ${SRS_PLATFORM}/ffmpeg)
@@ -493,11 +493,16 @@ if [ $SRS_FFMPEG_TOOL = YES ]; then
     if [[ -f ${SRS_OBJS}/${SRS_PLATFORM}/ffmpeg/bin/ffmpeg ]]; then
         echo "ffmpeg-4.1 is ok.";
     else
-        echo "no ffmpeg found, please use srs-docker or --without-ffmpeg";
+        echo "Warning: No FFmpeg found at /usr/local/bin/ffmpeg";
+        echo "    please copy it from srs-docker";
+        echo "    or download from http://ffmpeg.org/download.html";
+        echo "    or disable it by --without-ffmpeg";
         exit -1;
     fi
     # Always update the links.
-    (cd ${SRS_OBJS} && rm -rf ffmpeg && ln -sf ${SRS_PLATFORM}/ffmpeg)
+    if [[ -f ${SRS_OBJS}/${SRS_PLATFORM}/ffmpeg ]]; then
+        (cd ${SRS_OBJS} && rm -rf ffmpeg && ln -sf ${SRS_PLATFORM}/ffmpeg)
+    fi
 fi
 
 #####################################################################################
diff --git a/trunk/auto/options.sh b/trunk/auto/options.sh
index d6a52d83d..d6d1ddd3c 100755
--- a/trunk/auto/options.sh
+++ b/trunk/auto/options.sh
@@ -569,10 +569,6 @@ function check_option_conflicts() {
         echo "Don't support building NGINX, please use docker https://github.com/ossrs/srs-docker"; exit -1;
     fi
 
-    if [[ $SRS_FFMPEG_TOOL == YES ]]; then
-        echo "Don't support building FFMPEG, please use docker https://github.com/ossrs/srs-docker"; exit -1;
-    fi
-
     # TODO: FIXME: check more os.
 
     __check_ok=YES
diff --git a/trunk/src/core/srs_core_version3.hpp b/trunk/src/core/srs_core_version3.hpp
index 4f18f8a52..b29289a07 100644
--- a/trunk/src/core/srs_core_version3.hpp
+++ b/trunk/src/core/srs_core_version3.hpp
@@ -24,6 +24,6 @@
 #ifndef SRS_CORE_VERSION3_HPP
 #define SRS_CORE_VERSION3_HPP
 
-#define SRS_VERSION3_REVISION 146
+#define SRS_VERSION3_REVISION 147
 
 #endif