diff --git a/trunk/auto/depends.sh b/trunk/auto/depends.sh
index 67840eeb2..01408120d 100755
--- a/trunk/auto/depends.sh
+++ b/trunk/auto/depends.sh
@@ -331,8 +331,10 @@ fi
 #####################################################################################
 # build research code
 #####################################################################################
-(cd research/hls && make)
+mkdir -p ${SRS_OBJS}/research
+
+(cd research/hls && make && mv ts_info ../../${SRS_OBJS}/research)
 ret=$?; if [[ $ret -ne 0 ]]; then echo "build research/hls failed, ret=$ret"; exit $ret; fi
 
-(cd research/ffempty && make)
+(cd research/ffempty && make && mv ffempty ../../${SRS_OBJS}/research)
 ret=$?; if [[ $ret -ne 0 ]]; then echo "build research/ffempty failed, ret=$ret"; exit $ret; fi
diff --git a/trunk/conf/srs.conf b/trunk/conf/srs.conf
index 9ee10aeed..2694e698d 100755
--- a/trunk/conf/srs.conf
+++ b/trunk/conf/srs.conf
@@ -571,7 +571,7 @@ vhost all.transcode.vhost.com {
 vhost ffempty.transcode.vhost.com {
     transcode {
         enabled     on;
-        ffmpeg ./research/ffempty/ffempty;
+        ffmpeg ./objs/research/ffempty;
         engine empty {
             enabled         on;
             vcodec          libx264;