diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index 92ba24982..3e08b9e94 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -6413,9 +6413,9 @@ string SrsConfig::get_hds_path(const string &vhost)
     return conf->arg0();
 }
 
-double SrsConfig::get_hds_fragment(const string &vhost)
+srs_utime_t SrsConfig::get_hds_fragment(const string &vhost)
 {
-    static double DEFAULT = 10;
+    static srs_utime_t DEFAULT = (10 * SRS_UTIME_SECONDS);
     
     SrsConfDirective* conf = get_hds(vhost);
     if (!conf) {
@@ -6427,12 +6427,12 @@ double SrsConfig::get_hds_fragment(const string &vhost)
         return DEFAULT;
     }
     
-    return ::atof(conf->arg0().c_str());
+    return srs_utime_t(::atof(conf->arg0().c_str()) * SRS_UTIME_SECONDS);
 }
 
-double SrsConfig::get_hds_window(const string &vhost)
+srs_utime_t SrsConfig::get_hds_window(const string &vhost)
 {
-    static double DEFAULT = 60;
+    static srs_utime_t DEFAULT = (60 * SRS_UTIME_SECONDS);
     
     SrsConfDirective* conf = get_hds(vhost);
     if (!conf) {
@@ -6444,7 +6444,7 @@ double SrsConfig::get_hds_window(const string &vhost)
         return DEFAULT;
     }
     
-    return ::atof(conf->arg0().c_str());
+    return srs_utime_t(::atof(conf->arg0().c_str()) * SRS_UTIME_SECONDS);
 }
 
 SrsConfDirective* SrsConfig::get_dvr(string vhost)
diff --git a/trunk/src/app/srs_app_config.hpp b/trunk/src/app/srs_app_config.hpp
index 235bb715f..d45a1b4c6 100644
--- a/trunk/src/app/srs_app_config.hpp
+++ b/trunk/src/app/srs_app_config.hpp
@@ -1277,15 +1277,14 @@ public:
      */
     virtual std::string get_hds_path(const std::string &vhost);
     /**
-     * get the hds fragment time, in seconds.
+     * get the hds fragment time, in srs_utime_t.
      */
-     // TODO: FIXME: Refine to time unit.
-    virtual double get_hds_fragment(const std::string &vhost);
+    virtual srs_utime_t get_hds_fragment(const std::string &vhost);
     /**
-     * get the hds window time, in seconds.
+     * get the hds window time, in srs_utime_t.
      * a window is a set of hds fragments.
      */
-    virtual double get_hds_window(const std::string &vhost);
+    virtual srs_utime_t get_hds_window(const std::string &vhost);
 // dvr section
 private:
     /**
diff --git a/trunk/src/app/srs_app_hds.cpp b/trunk/src/app/srs_app_hds.cpp
index 67952fc5d..dc5d38a7f 100644
--- a/trunk/src/app/srs_app_hds.cpp
+++ b/trunk/src/app/srs_app_hds.cpp
@@ -348,7 +348,7 @@ srs_error_t SrsHds::on_video(SrsSharedPtrMessage* msg)
     
     currentSegment->on_video(msg);
     
-    double fragment_duration = _srs_config->get_hds_fragment(hds_req->vhost) * 1000;
+    double fragment_duration = srsu2ms(_srs_config->get_hds_fragment(hds_req->vhost));
     if (currentSegment->duration() >= fragment_duration) {
         // flush segment
         if ((err = currentSegment->flush()) != srs_success) {
@@ -398,7 +398,7 @@ srs_error_t SrsHds::on_audio(SrsSharedPtrMessage* msg)
     
     currentSegment->on_audio(msg);
     
-    double fragment_duration = _srs_config->get_hds_fragment(hds_req->vhost) * 1000;
+    double fragment_duration = srsu2ms(_srs_config->get_hds_fragment(hds_req->vhost));
     if (currentSegment->duration() >= fragment_duration) {
         // flush segment
         if ((err = currentSegment->flush()) != srs_success) {
@@ -718,7 +718,7 @@ void SrsHds::adjust_windows()
         windows_size += fragment->duration();
     }
     
-    double windows_size_limit = _srs_config->get_hds_window(hds_req->vhost) * 1000;
+    double windows_size_limit = srsu2ms(_srs_config->get_hds_window(hds_req->vhost));
     if (windows_size > windows_size_limit ) {
         SrsHdsFragment *fragment = fragments.front();
         unlink(fragment->fragment_path().c_str());
diff --git a/trunk/src/utest/srs_utest_config.cpp b/trunk/src/utest/srs_utest_config.cpp
index 90f2d4099..8dc37b3d2 100644
--- a/trunk/src/utest/srs_utest_config.cpp
+++ b/trunk/src/utest/srs_utest_config.cpp
@@ -1879,6 +1879,16 @@ VOID TEST(ConfigUnitTest, CheckDefaultValuesVhost)
 	    EXPECT_EQ(30 * SRS_UTIME_SECONDS, conf.get_hls_window("v"));
     }
 
+    if (true) {
+	    EXPECT_TRUE(ERROR_SUCCESS == conf.parse(_MIN_OK_CONF));
+	    EXPECT_EQ(10 * SRS_UTIME_SECONDS, conf.get_hds_fragment(""));
+	    EXPECT_EQ(60 * SRS_UTIME_SECONDS, conf.get_hds_window(""));
+
+	    EXPECT_TRUE(ERROR_SUCCESS == conf.parse(_MIN_OK_CONF"vhost v{hds{hds_fragment 20;hds_window 30;}}"));
+	    EXPECT_EQ(20 * SRS_UTIME_SECONDS, conf.get_hds_fragment("v"));
+	    EXPECT_EQ(30 * SRS_UTIME_SECONDS, conf.get_hds_window("v"));
+    }
+
     if (true) {
 	    EXPECT_TRUE(ERROR_SUCCESS == conf.parse(_MIN_OK_CONF));
 	    EXPECT_EQ(30 * SRS_UTIME_SECONDS, conf.get_queue_length(""));