diff --git a/trunk/conf/full.conf b/trunk/conf/full.conf
index c8d041144..e706aed5c 100644
--- a/trunk/conf/full.conf
+++ b/trunk/conf/full.conf
@@ -665,7 +665,7 @@ vhost refer.anti_suck.com {
     }
 }
 
-# vhost for bandwidth check
+# vhost for bwt(bandwidth check)
 # generally, the bandcheck vhost must be: bandcheck.srs.com,
 # or need to modify the vhost of client.
 vhost bandcheck.srs.com {
diff --git a/trunk/research/players/srs_bwt.html b/trunk/research/players/srs_bwt.html
index c91116986..746414aaa 100644
--- a/trunk/research/players/srs_bwt.html
+++ b/trunk/research/players/srs_bwt.html
@@ -35,39 +35,54 @@
     </div>
 </div>
 <div class="container">
-    <div class="alert alert-info fade in">
-        <button type="button" class="close" data-dismiss="alert">×</button>
-        <strong><span>Usage:</span></strong> <span>点击“开始测速”即可测带宽，最大可测试带宽由服务器限制</span>
-    </div>
-     <div class="form-inline">
-         URL:
-         <input type="text" id="txt_url" class="input-xxlarge" value=""></input>
-         <button class="btn btn-primary" id="btn_play">开始测速</button>
+    <div name="detect_flash">
+        <div id="main_flash_alert" class="alert alert-danger fade in hide">
+            <button type="button" class="close" data-dismiss="alert">×</button>
+            <strong><span>Usage:</span></strong>
+            <span>
+                请点击下面的图标，启用Flash
+            </span>
+        </div>
+        <div id="main_flash_hdr" class="hide">
+        </div>
     </div>
-     <div id="main_modal" class="modal hide fade">
-         <div class="modal-header">
-             <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
-             <h3>SRS Bandwidth Check</h3>
-         </div>
-         <div class="modal-body">
-            <div class="row-fluid">
-                <div class="span1"></div>
-                <div class="span10">
-                    <div class="progress progress-striped active" id="pb_buffer_bg">
-                        <div class="bar" style="width: 0%;" id="progress_bar"></div>
+
+    <div id="main_content" class="hide">
+        <div class="alert alert-info fade in">
+            <button type="button" class="close" data-dismiss="alert">×</button>
+            <strong><span>Usage:</span></strong> <span>点击“开始测速”即可测带宽，最大可测试带宽由服务器限制</span>
+        </div>
+         <div class="form-inline">
+             URL:
+             <input type="text" id="txt_url" class="input-xxlarge" value=""></input>
+             <button class="btn btn-primary" id="btn_play">开始测速</button>
+        </div>
+         <div id="main_modal" class="modal hide fade">
+             <div class="modal-header">
+                 <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
+                 <h3>SRS Bandwidth Check</h3>
+             </div>
+             <div class="modal-body">
+                <div class="row-fluid">
+                    <div class="span1"></div>
+                    <div class="span10">
+                        <div class="progress progress-striped active" id="pb_buffer_bg">
+                            <div class="bar" style="width: 0%;" id="progress_bar"></div>
+                        </div>
                     </div>
+                    <div class="span1"></div>
                 </div>
-                <div class="span1"></div>
-            </div>
-            <div id="check_status">status</div>
-            <div id="check_info">info</div>
-         </div>
-         <div class="modal-footer">
-             <button class="btn btn-primary" data-dismiss="modal" aria-hidden="true"> 关闭 </button>
+                <div id="check_status">status</div>
+                <div id="check_info">info</div>
+             </div>
+             <div class="modal-footer">
+                 <button class="btn btn-primary" data-dismiss="modal" aria-hidden="true"> 关闭 </button>
+             </div>
          </div>
-     </div>
-    <hr>
+    </div>
+
     <footer>
+        <p></p>
         <p><a href="https://github.com/ossrs/srs">SRS Team &copy; 2013</a></p>
     </footer>
     <div class="container">
@@ -86,15 +101,57 @@
 <script type="text/javascript" src="js/winlin.utility.js"></script>
 <script type="text/javascript" src="srs_bwt/src/srs.bandwidth.js"></script>
 <script type="text/javascript">
-    var bandwidth = null;
+    var __on_flash_ready = null;
 
     $(function(){
+        // 探测Flash是否正常启用。
+        $('#main_flash_hdr').html(
+            '\
+            <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" width="100%" height="100%"> \
+                <param name="movie" value="srs_player/release/srs_player.swf"> \
+                <param name="quality" value="autohigh"> \
+                <param name="swliveconnect" value="true"> \
+                <param name="allowScriptAccess" value="always"> \
+                <param name="bgcolor" value="#0"> \
+                <param name="allowFullScreen" value="true"> \
+                <param name="wmode" value="opaque"> \
+                <param name="FlashVars" value="log=1"> \
+                <param name="flashvars" value="id=1&on_player_ready=__on_flash_ready"> \
+                <embed src="srs_player/release/srs_player.swf" width="100%" height="100%" \
+                    quality="autohigh" bgcolor="#0" align="middle" allowfullscreen="true" allowscriptaccess="always" \
+                    type="application/x-shockwave-flash" swliveconnect="true" wmode="opaque" \
+                    flashvars="id=1&on_player_ready=__on_flash_ready" \
+                    pluginspage="http://www.macromedia.com/go/getflashplayer"> \
+            </object> \
+            '
+        );
+        $('#main_flash_hdr').show();
+
+        var showFlashHdr = setTimeout(function(){
+            $('#main_flash_alert').show();
+        }, 300);
+
+        __on_flash_ready = function (id) {
+            clearTimeout(showFlashHdr);
+
+            $('#main_flash_alert').hide();
+            $('#main_flash_hdr').hide();
+            $('#main_content').show();
+
+            autoLoadPage();
+        };
+    });
+</script>
+<script type="text/javascript">
+    var bandwidth = null;
+
+    var autoLoadPage = function() {
         srs_init_bwt("#txt_url");
 
         $("#btn_play").click(on_click_play);
         $("#main_modal").on("show", on_start_bandwidth_test);
         $("#main_modal").on("hide", on_stop_bandwidth_test);
-    });
+    };
 
     function on_click_play() {
         $("#check_status").text("");
@@ -128,8 +185,7 @@
         }
         bandwidth.on_srs_info = function(srs_server, srs_primary, srs_authors, srs_id, srs_pid, srs_server_ip) {
             $("#check_info").text(
-                    "server:" + srs_server + ", primary:" + srs_primary + ", authors:" + srs_authors +
-                    ", srs_id:" + srs_id + ", srs_pid:" + srs_pid + ", ip:" + srs_server_ip
+                    "server:" + srs_server + ", srs_id:" + srs_id + ", srs_pid:" + srs_pid + ", ip:" + srs_server_ip
             );
         }
         bandwidth.on_error = function(code) {
diff --git a/trunk/src/app/srs_app_bandwidth.cpp b/trunk/src/app/srs_app_bandwidth.cpp
index 55b474c5a..da4d7dcb8 100644
--- a/trunk/src/app/srs_app_bandwidth.cpp
+++ b/trunk/src/app/srs_app_bandwidth.cpp
@@ -47,24 +47,24 @@ using namespace std;
 
 SrsBandwidthSample::SrsBandwidthSample()
 {
-    duration_ms = _SRS_BANDWIDTH_SAMPLE_DURATION;
-    kbps = interval_ms = actual_duration_ms = bytes = 0;
+    duration = _SRS_BANDWIDTH_SAMPLE_DURATION;
+    kbps = interval = actual_duration = bytes = 0;
 }
 
 SrsBandwidthSample::~SrsBandwidthSample()
 {
 }
 
-void SrsBandwidthSample::calc_kbps(int _bytes, int _duration)
+void SrsBandwidthSample::calc_kbps(int _bytes, srs_utime_t _duration)
 {
     bytes = _bytes;
-    actual_duration_ms = _duration;
+    actual_duration = _duration;
     
-    if (actual_duration_ms <= 0) {
+    if (actual_duration <= 0) {
         return;
     }
     
-    kbps = bytes * 8 / actual_duration_ms;
+    kbps = bytes * 8 / srsu2ms(actual_duration);
 }
 
 /**
@@ -180,8 +180,8 @@ srs_error_t SrsBandwidth::do_bandwidth_check(SrsKbpsLimit* limit)
     SrsBandwidthSample publish_sample;
     
     // timeout for a packet.
-    _rtmp->set_send_timeout(play_sample.duration_ms * 2 * SRS_UTIME_MILLISECONDS);
-    _rtmp->set_recv_timeout(publish_sample.duration_ms * 2 * SRS_UTIME_MILLISECONDS);
+    _rtmp->set_send_timeout(play_sample.duration * 2);
+    _rtmp->set_recv_timeout(publish_sample.duration * 2);
     
     // start test.
     srs_utime_t start_time = srs_update_system_time();
@@ -216,9 +216,8 @@ srs_error_t SrsBandwidth::do_bandwidth_check(SrsKbpsLimit* limit)
     }
 
     srs_trace("bandwidth ok. duartion=%dms(%d+%d), play=%dkbps, publish=%dkbps",
-		srsu2msi(end_time - start_time), play_sample.actual_duration_ms,
-		publish_sample.actual_duration_ms, play_sample.kbps,
-		publish_sample.kbps);
+		srsu2msi(end_time - start_time), srsu2msi(play_sample.actual_duration), srsu2msi(publish_sample.actual_duration),
+		play_sample.kbps, publish_sample.kbps);
     
     srs_usleep(_SRS_BANDWIDTH_FINAL_WAIT);
     
@@ -234,8 +233,8 @@ srs_error_t SrsBandwidth::play_start(SrsBandwidthSample* sample, SrsKbpsLimit* l
         SrsBandwidthPacket* pkt = SrsBandwidthPacket::create_start_play();
         
         pkt->data->set("limit_kbps", SrsAmf0Any::number(limit->limit_kbps()));
-        pkt->data->set("duration_ms", SrsAmf0Any::number(sample->duration_ms));
-        pkt->data->set("interval_ms", SrsAmf0Any::number(sample->interval_ms));
+        pkt->data->set("duration_ms", SrsAmf0Any::number(srsu2msi(sample->duration)));
+        pkt->data->set("interval_ms", SrsAmf0Any::number(srsu2msi(sample->interval)));
         
         if ((err = _rtmp->send_and_free_packet(pkt, 0)) != srs_success) {
             return srs_error_wrap(err, "send packet");
@@ -260,8 +259,8 @@ srs_error_t SrsBandwidth::play_checking(SrsBandwidthSample* sample, SrsKbpsLimit
     
     int data_count = 1;
     srs_utime_t starttime = srs_update_system_time();
-    while (int64_t(srsu2ms(srs_get_system_time() - starttime)) < sample->duration_ms) {
-        srs_usleep(sample->interval_ms * SRS_UTIME_MILLISECONDS);
+    while (srs_get_system_time() - starttime < sample->duration) {
+        srs_usleep(sample->interval);
         
         // TODO: FIXME: use shared ptr message.
         SrsBandwidthPacket* pkt = SrsBandwidthPacket::create_playing();
@@ -295,9 +294,9 @@ srs_error_t SrsBandwidth::play_stop(SrsBandwidthSample* sample, SrsKbpsLimit* /*
         // notify client to stop play
         SrsBandwidthPacket* pkt = SrsBandwidthPacket::create_stop_play();
         
-        pkt->data->set("duration_ms", SrsAmf0Any::number(sample->duration_ms));
-        pkt->data->set("interval_ms", SrsAmf0Any::number(sample->interval_ms));
-        pkt->data->set("duration_delta", SrsAmf0Any::number(sample->actual_duration_ms));
+        pkt->data->set("duration_ms", SrsAmf0Any::number(srsu2msi(sample->duration)));
+        pkt->data->set("interval_ms", SrsAmf0Any::number(srsu2msi(sample->interval)));
+        pkt->data->set("duration_delta", SrsAmf0Any::number(srsu2msi(sample->actual_duration)));
         pkt->data->set("bytes_delta", SrsAmf0Any::number(sample->bytes));
         
         if ((err = _rtmp->send_and_free_packet(pkt, 0)) != srs_success) {
@@ -321,8 +320,8 @@ srs_error_t SrsBandwidth::publish_start(SrsBandwidthSample* sample, SrsKbpsLimit
         SrsBandwidthPacket* pkt = SrsBandwidthPacket::create_start_publish();
         
         pkt->data->set("limit_kbps", SrsAmf0Any::number(limit->limit_kbps()));
-        pkt->data->set("duration_ms", SrsAmf0Any::number(sample->duration_ms));
-        pkt->data->set("interval_ms", SrsAmf0Any::number(sample->interval_ms));
+        pkt->data->set("duration_ms", SrsAmf0Any::number(srsu2msi(sample->duration)));
+        pkt->data->set("interval_ms", SrsAmf0Any::number(srsu2msi(sample->interval)));
         
         if ((err = _rtmp->send_and_free_packet(pkt, 0)) != srs_success) {
             return srs_error_wrap(err, "send packet");
@@ -340,9 +339,9 @@ srs_error_t SrsBandwidth::publish_checking(SrsBandwidthSample* sample, SrsKbpsLi
 {
     srs_error_t err = srs_success;
     
-    // recv publish msgs until @duration_ms ms
+    // recv publish msgs until @duration ms
     srs_utime_t starttime = srs_update_system_time();
-    while (int64_t(srsu2ms(srs_get_system_time() - starttime)) < sample->duration_ms) {
+    while (srs_get_system_time() - starttime < sample->duration) {
         SrsCommonMessage* msg = NULL;
         SrsBandwidthPacket* pkt = NULL;
         if ((err = _rtmp->expect_message<SrsBandwidthPacket>(&msg, &pkt)) != srs_success) {
@@ -372,9 +371,9 @@ srs_error_t SrsBandwidth::publish_stop(SrsBandwidthSample* sample, SrsKbpsLimit*
     if (true) {
         // notify client to stop publish
         SrsBandwidthPacket* pkt = SrsBandwidthPacket::create_stop_publish();
-        pkt->data->set("duration_ms", SrsAmf0Any::number(sample->duration_ms));
-        pkt->data->set("interval_ms", SrsAmf0Any::number(sample->interval_ms));
-        pkt->data->set("duration_delta", SrsAmf0Any::number(sample->actual_duration_ms));
+        pkt->data->set("duration_ms", SrsAmf0Any::number(srsu2msi(sample->duration)));
+        pkt->data->set("interval_ms", SrsAmf0Any::number(srsu2msi(sample->interval)));
+        pkt->data->set("duration_delta", SrsAmf0Any::number(srsu2msi(sample->actual_duration)));
         pkt->data->set("bytes_delta", SrsAmf0Any::number(sample->bytes));
         
         if ((err = _rtmp->send_and_free_packet(pkt, 0)) != srs_success) {
@@ -411,8 +410,8 @@ srs_error_t SrsBandwidth::do_final(SrsBandwidthSample& play_sample, SrsBandwidth
     pkt->data->set("publish_kbps",   SrsAmf0Any::number(publish_sample.kbps));
     pkt->data->set("play_bytes",     SrsAmf0Any::number(play_sample.bytes));
     pkt->data->set("publish_bytes",  SrsAmf0Any::number(publish_sample.bytes));
-    pkt->data->set("play_time",      SrsAmf0Any::number(play_sample.actual_duration_ms));
-    pkt->data->set("publish_time",   SrsAmf0Any::number(publish_sample.actual_duration_ms));
+    pkt->data->set("play_time",      SrsAmf0Any::number(srsu2msi(play_sample.actual_duration)));
+    pkt->data->set("publish_time",   SrsAmf0Any::number(srsu2msi(publish_sample.actual_duration)));
     
     if ((err = _rtmp->send_and_free_packet(pkt, 0)) != srs_success) {
         return srs_error_wrap(err, "send packet");
diff --git a/trunk/src/app/srs_app_bandwidth.hpp b/trunk/src/app/srs_app_bandwidth.hpp
index af7b232ab..4c8365cd6 100644
--- a/trunk/src/app/srs_app_bandwidth.hpp
+++ b/trunk/src/app/srs_app_bandwidth.hpp
@@ -40,14 +40,14 @@ class ISrsProtocolStatistic;
 class SrsBandwidthSample
 {
 public:
-    // The plan, how long to do the test, in ms,
+    // The plan, how long to do the test,
     // if exceed the duration, abort the test.
-    int duration_ms;
-    // The plan, interval for each check/test packet, in ms
-    int interval_ms;
+    srs_utime_t duration;
+    // The plan, interval for each check/test packet
+    srs_utime_t interval;
 public:
-    // The actual test duration, in ms.
-    int actual_duration_ms;
+    // The actual test duration.
+    srs_utime_t actual_duration;
     // The actual test bytes
     int bytes;
     // The actual test kbps
@@ -58,8 +58,8 @@ public:
 public:
     // Update the bytes and actual duration, then calc the kbps.
     // @param _bytes update the sample bytes.
-    // @param _duration update the actual duration, in ms.
-    virtual void calc_kbps(int _bytes, int _duration);
+    // @param _duration update the actual duration.
+    virtual void calc_kbps(int _bytes, srs_utime_t _duration);
 };
 
 // The bandwidth test agent which provides the interfaces for bandwidth check.