diff --git a/trunk/research/librtmp/srs_detect_rtmp.c b/trunk/research/librtmp/srs_detect_rtmp.c
index 155d28bd0..84d18cc34 100644
--- a/trunk/research/librtmp/srs_detect_rtmp.c
+++ b/trunk/research/librtmp/srs_detect_rtmp.c
@@ -35,7 +35,7 @@ int main(int argc, char** argv)
     srs_rtmp_t rtmp;
     
     // time
-    int64_t time_startup = srs_utils_get_time_ms();
+    int64_t time_startup = srs_utils_time_ms();
     int64_t time_dns_resolve = 0;
     int64_t time_socket_connect = 0;
     int64_t time_play_stream = 0;
@@ -95,14 +95,14 @@ int main(int argc, char** argv)
         goto rtmp_destroy;
     }
     srs_human_trace("dns resolve success");
-    time_dns_resolve = srs_utils_get_time_ms();
+    time_dns_resolve = srs_utils_time_ms();
     
     if ((ret = __srs_rtmp_connect_server(rtmp)) != 0) {
         srs_human_trace("socket connect failed. ret=%d", ret);
         goto rtmp_destroy;
     }
     srs_human_trace("socket connect success");
-    time_socket_connect = srs_utils_get_time_ms();
+    time_socket_connect = srs_utils_time_ms();
     
     if ((ret = __srs_rtmp_do_simple_handshake(rtmp)) != 0) {
         srs_human_trace("do simple handshake failed. ret=%d", ret);
@@ -121,7 +121,7 @@ int main(int argc, char** argv)
         goto rtmp_destroy;
     }
     srs_human_trace("play stream success");
-    time_play_stream = srs_utils_get_time_ms();
+    time_play_stream = srs_utils_time_ms();
     
     for (;;) {
         if ((ret = srs_rtmp_read_packet(rtmp, &type, &timestamp, &data, &size)) != 0) {
@@ -133,7 +133,7 @@ int main(int argc, char** argv)
         
         if (SRS_RTMP_TYPE_VIDEO == type || SRS_RTMP_TYPE_AUDIO == type) {
             if (time_first_packet <= 0) {
-                time_first_packet = srs_utils_get_time_ms();
+                time_first_packet = srs_utils_time_ms();
             }
             if (basetime <= 0) {
                 basetime = timestamp;
@@ -142,7 +142,7 @@ int main(int argc, char** argv)
         
         free(data);
         
-        if (srs_utils_get_time_ms() - time_startup > timeout * 1000) {
+        if (srs_utils_time_ms() - time_startup > timeout * 1000) {
             srs_human_trace("timeout, terminate.");
             goto rtmp_destroy;
         }
@@ -154,11 +154,11 @@ int main(int argc, char** argv)
     }
     
 rtmp_destroy:
-    bytes_nsend = srs_utils_get_send_bytes(rtmp);
-    bytes_nrecv = srs_utils_get_recv_bytes(rtmp);
+    bytes_nsend = srs_utils_send_bytes(rtmp);
+    bytes_nrecv = srs_utils_recv_bytes(rtmp);
     
     srs_rtmp_destroy(rtmp);
-    time_cleanup = srs_utils_get_time_ms();
+    time_cleanup = srs_utils_time_ms();
     time_duration = (int)(time_cleanup - time_startup);
     
     // print result to stderr.
diff --git a/trunk/research/librtmp/srs_ingest_flv.c b/trunk/research/librtmp/srs_ingest_flv.c
index 8b21170f6..55466af4b 100644
--- a/trunk/research/librtmp/srs_ingest_flv.c
+++ b/trunk/research/librtmp/srs_ingest_flv.c
@@ -48,7 +48,7 @@ int main(int argc, char** argv)
     int ret = 0;
     
     // main function
-    tools_main_entrance_startup_time = srs_utils_get_time_ms();
+    tools_main_entrance_startup_time = srs_utils_time_ms();
     
     // user option parse index.
     int opt = 0;
@@ -215,7 +215,7 @@ int connect_oc(srs_rtmp_t ortmp)
 int64_t re_create()
 {
     // if not very precise, we can directly use this as re.
-    int64_t re = srs_utils_get_time_ms();
+    int64_t re = srs_utils_time_ms();
     
     // use the starttime to get the deviation
     int64_t deviation = re - tools_main_entrance_startup_time;
@@ -236,7 +236,7 @@ int64_t re_create()
 void re_update(int64_t re, int32_t starttime, u_int32_t time)
 {
     // send by pulse algorithm.
-    int64_t now = srs_utils_get_time_ms();
+    int64_t now = srs_utils_time_ms();
     int64_t diff = time - starttime - (now -re);
     if (diff > RE_PULSE_MS) {
         usleep(diff * 1000);
@@ -246,7 +246,7 @@ void re_cleanup(int64_t re, int32_t starttime, u_int32_t time)
 {
     // for the last pulse, always sleep.
     // for the virtual live encoder long time publishing.
-    int64_t now = srs_utils_get_time_ms();
+    int64_t now = srs_utils_time_ms();
     int64_t diff = time - starttime - (now -re);
     if (diff > 0) {
         srs_human_trace("re_cleanup, diff=%d, start=%d, last=%d ms", 
diff --git a/trunk/src/libs/srs_librtmp.cpp b/trunk/src/libs/srs_librtmp.cpp
index 591faf819..cb826f925 100644
--- a/trunk/src/libs/srs_librtmp.cpp
+++ b/trunk/src/libs/srs_librtmp.cpp
@@ -1712,20 +1712,20 @@ void srs_amf0_strict_array_append(srs_amf0_t amf0, srs_amf0_t value)
     obj->append(any);
 }
 
-int64_t srs_utils_get_time_ms()
+int64_t srs_utils_time_ms()
 {
     srs_update_system_time_ms();
     return srs_get_system_time_ms();
 }
 
-int64_t srs_utils_get_send_bytes(srs_rtmp_t rtmp)
+int64_t srs_utils_send_bytes(srs_rtmp_t rtmp)
 {
     srs_assert(rtmp != NULL);
     Context* context = (Context*)rtmp;
     return context->rtmp->get_send_bytes();
 }
 
-int64_t srs_utils_get_recv_bytes(srs_rtmp_t rtmp)
+int64_t srs_utils_recv_bytes(srs_rtmp_t rtmp)
 {
     srs_assert(rtmp != NULL);
     Context* context = (Context*)rtmp;
@@ -1773,7 +1773,7 @@ int srs_utils_parse_timestamp(
     return ret;
 }
 
-char srs_utils_get_flv_video_codec_id(char* data, int size)
+char srs_utils_flv_video_codec_id(char* data, int size)
 {
     if (size < 1) {
         return 0;
@@ -1785,7 +1785,7 @@ char srs_utils_get_flv_video_codec_id(char* data, int size)
     return codec_id;
 }
 
-char srs_utils_get_flv_video_avc_packet_type(char* data, int size)
+char srs_utils_flv_video_avc_packet_type(char* data, int size)
 {
     if (size < 2) {
         return -1;
@@ -1804,7 +1804,7 @@ char srs_utils_get_flv_video_avc_packet_type(char* data, int size)
     return avc_packet_type;
 }
 
-char srs_utils_get_flv_video_frame_type(char* data, int size)
+char srs_utils_flv_video_frame_type(char* data, int size)
 {
     if (size < 1) {
         return -1;
@@ -1924,9 +1924,9 @@ int srs_human_print_rtmp_packet(char type, u_int32_t timestamp, char* data, int
     if (type == SRS_RTMP_TYPE_VIDEO) {
         srs_human_trace("Video packet type=%s, dts=%d, pts=%d, size=%d, %s(%s,%s)", 
             srs_human_flv_tag_type2string(type), timestamp, pts, size,
-            srs_human_flv_video_codec_id2string(srs_utils_get_flv_video_codec_id(data, size)),
-            srs_human_flv_video_avc_packet_type2string(srs_utils_get_flv_video_avc_packet_type(data, size)),
-            srs_human_flv_video_frame_type2string(srs_utils_get_flv_video_frame_type(data, size))
+            srs_human_flv_video_codec_id2string(srs_utils_flv_video_codec_id(data, size)),
+            srs_human_flv_video_avc_packet_type2string(srs_utils_flv_video_avc_packet_type(data, size)),
+            srs_human_flv_video_frame_type2string(srs_utils_flv_video_frame_type(data, size))
         );
     } else if (type == SRS_RTMP_TYPE_AUDIO) {
         srs_human_trace("Audio packet type=%s, dts=%d, pts=%d, size=%d", 
diff --git a/trunk/src/libs/srs_librtmp.hpp b/trunk/src/libs/srs_librtmp.hpp
index 8bed20596..d0ffd1567 100644
--- a/trunk/src/libs/srs_librtmp.hpp
+++ b/trunk/src/libs/srs_librtmp.hpp
@@ -592,17 +592,17 @@ extern void srs_amf0_strict_array_append(srs_amf0_t amf0, srs_amf0_t value);
 * get the current system time in ms.
 * use gettimeofday() to get system time.
 */
-extern int64_t srs_utils_get_time_ms();
+extern int64_t srs_utils_time_ms();
 
 /**
 * get the send bytes.
 */
-extern int64_t srs_utils_get_send_bytes(srs_rtmp_t rtmp);
+extern int64_t srs_utils_send_bytes(srs_rtmp_t rtmp);
 
 /**
 * get the recv bytes.
 */
-extern int64_t srs_utils_get_recv_bytes(srs_rtmp_t rtmp);
+extern int64_t srs_utils_recv_bytes(srs_rtmp_t rtmp);
 
 /**
 * parse the dts and pts by time in header and data in tag,
@@ -635,7 +635,7 @@ extern int srs_utils_parse_timestamp(
 *           7 = AVC
 * @return the code id. 0 for error.
 */
-extern char srs_utils_get_flv_video_codec_id(char* data, int size);
+extern char srs_utils_flv_video_codec_id(char* data, int size);
 
 /**
 * get the AVCPacketType of video tag.
@@ -646,7 +646,7 @@ extern char srs_utils_get_flv_video_codec_id(char* data, int size);
 *               not required or supported)
 * @return the avc packet type. -1(0xff) for error.
 */
-extern char srs_utils_get_flv_video_avc_packet_type(char* data, int size);
+extern char srs_utils_flv_video_avc_packet_type(char* data, int size);
 
 /**
 * get the FrameType of video tag.
@@ -658,7 +658,7 @@ extern char srs_utils_get_flv_video_avc_packet_type(char* data, int size);
 *           5 = video info/command frame
 * @return the frame type. 0 for error.
 */
-extern char srs_utils_get_flv_video_frame_type(char* data, int size);
+extern char srs_utils_flv_video_frame_type(char* data, int size);
 
 /*************************************************************
 **************************************************************