diff --git a/trunk/research/librtmp/srs_h264_raw_publish.c b/trunk/research/librtmp/srs_h264_raw_publish.c
index f4326498e..df1a76c40 100644
--- a/trunk/research/librtmp/srs_h264_raw_publish.c
+++ b/trunk/research/librtmp/srs_h264_raw_publish.c
@@ -28,6 +28,11 @@ gcc srs_h264_raw_publish.c ../../objs/lib/srs_librtmp.a -g -O0 -lstdc++ -o srs_h
 #include <stdlib.h>
 #include <unistd.h>
 
+// for open h264 raw file.
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+       
 #include "../../objs/include/srs_librtmp.h"
 
 #define srs_trace(msg, ...) printf(msg, ##__VA_ARGS__);printf("\n")
@@ -40,7 +45,7 @@ int main(int argc, char** argv)
     
     if (argc <= 2) {
         srs_trace("Usage: %s <h264_raw_file> <rtmp_publish_url>", argv[0]);
-        srs_trace("     h264_raw_file: the raw h264 steam file.");
+        srs_trace("     h264_raw_file: the h264 raw steam file.");
         srs_trace("     rtmp_publish_url: the rtmp publish url.");
         srs_trace("For example:");
         srs_trace("     %s ./720p.h264.raw rtmp://127.0.0.1:1935/live/livestream", argv[0]);
@@ -53,6 +58,14 @@ int main(int argc, char** argv)
     const char* rtmp_url = argv[2];
     srs_trace("raw_file=%s, rtmp_url=%s", raw_file, rtmp_url);
     
+    // open file
+    int raw_fd = open(raw_file, O_RDONLY);
+    if (raw_fd < 0) {
+        srs_trace("open h264 raw file %s failed.", raw_fd);
+        goto rtmp_destroy;
+    }
+    
+    // connect rtmp context
     srs_rtmp_t rtmp = srs_rtmp_create(rtmp_url);
     
     if (srs_simple_handshake(rtmp) != 0) {
@@ -73,23 +86,42 @@ int main(int argc, char** argv)
     }
     srs_trace("publish stream success");
     
-    u_int32_t timestamp = 0;
+    u_int32_t dts = 0;
+    u_int32_t pts = 0;
     for (;;) {
-        int type = SRS_RTMP_TYPE_VIDEO;
-        timestamp += 40;
+        // read from file, or get h264 raw data from device, whatever.
         int size = 4096;
         char* data = (char*)malloc(4096);
-        
-        if (srs_write_packet(rtmp, type, timestamp, data, size) != 0) {
+        if ((size = read(raw_fd, data, size)) < 0) {
+            srs_trace("read h264 raw data failed. nread=%d", size);
             goto rtmp_destroy;
         }
-        srs_trace("sent packet: type=%s, time=%d, size=%d", srs_type2string(type), timestamp, size);
+        if (size == 0) {
+            srs_trace("publish h264 raw data completed.");
+            goto rtmp_destroy;
+        }
+
+        char* rtmp_data = NULL;
+        int rtmp_size = 0;
+        u_int32_t timestamp = 0;
+        if (srs_h264_to_rtmp(data, size, dts, pts, &rtmp_data, &rtmp_size, &timestamp) < 0) {
+            srs_trace("h264 raw data to rtmp data failed.");
+            goto rtmp_destroy;
+        }
+        
+        int type = SRS_RTMP_TYPE_VIDEO;
+        if (srs_write_packet(rtmp, type, timestamp, rtmp_data, rtmp_size) != 0) {
+            goto rtmp_destroy;
+        }
+        srs_trace("sent packet: type=%s, time=%d, size=%d", srs_type2string(type), timestamp, rtmp_size);
         
         usleep(40 * 1000);
     }
     
 rtmp_destroy:
     srs_rtmp_destroy(rtmp);
+    close(raw_fd);
     
     return 0;
 }
+
diff --git a/trunk/src/libs/srs_librtmp.cpp b/trunk/src/libs/srs_librtmp.cpp
index d1838f10e..d8eede766 100644
--- a/trunk/src/libs/srs_librtmp.cpp
+++ b/trunk/src/libs/srs_librtmp.cpp
@@ -996,6 +996,13 @@ char* srs_amf0_human_print(srs_amf0_t amf0, char** pdata, int* psize)
     return any->human_print(pdata, psize);
 }
 
+int srs_h264_to_rtmp(char* h264_raw_data, int h264_raw_size, u_int32_t dts, u_int32_t pts, char** prtmp_data, int* prtmp_size, u_int32_t* ptimestamp)
+{
+    *prtmp_data = h264_raw_data;
+    *prtmp_size = h264_raw_size;
+    return 0;
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/trunk/src/libs/srs_librtmp.hpp b/trunk/src/libs/srs_librtmp.hpp
index 8db2adbd3..384820a91 100644
--- a/trunk/src/libs/srs_librtmp.hpp
+++ b/trunk/src/libs/srs_librtmp.hpp
@@ -42,6 +42,11 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 extern "C"{
 #endif
 
+/*************************************************************
+**************************************************************
+* RTMP protocol context
+**************************************************************
+*************************************************************/
 // the RTMP handler.
 typedef void* srs_rtmp_t;
 
@@ -51,7 +56,7 @@ typedef void* srs_rtmp_t;
 *         rtmp://localhost/live/livestream
 * @return a rtmp handler, or NULL if error occured.
 */
-srs_rtmp_t srs_rtmp_create(const char* url);
+extern srs_rtmp_t srs_rtmp_create(const char* url);
 /**
 * create rtmp with url, used for connection specified application.
 * @param url the tcUrl, for exmple:
@@ -59,13 +64,18 @@ srs_rtmp_t srs_rtmp_create(const char* url);
 * @remark this is used to create application connection-oriented,
 *       for example, the bandwidth client used this, no stream specified.
 */
-srs_rtmp_t srs_rtmp_create2(const char* url);
+extern srs_rtmp_t srs_rtmp_create2(const char* url);
 /**
 * close and destroy the rtmp stack.
 * @remark, user should use the rtmp again.
 */
-void srs_rtmp_destroy(srs_rtmp_t rtmp);
+extern void srs_rtmp_destroy(srs_rtmp_t rtmp);
 
+/*************************************************************
+**************************************************************
+* RTMP protocol stack
+**************************************************************
+*************************************************************/
 /**
 * connect and handshake with server
 * category: publish/play
@@ -84,13 +94,13 @@ void srs_rtmp_destroy(srs_rtmp_t rtmp);
 *       __srs_do_simple_handshake()
 * user can use these functions if needed.
 */
-int srs_simple_handshake(srs_rtmp_t rtmp);
+extern int srs_simple_handshake(srs_rtmp_t rtmp);
 // parse uri, create socket, resolve host
-int __srs_dns_resolve(srs_rtmp_t rtmp);
+extern int __srs_dns_resolve(srs_rtmp_t rtmp);
 // connect socket to server
-int __srs_connect_server(srs_rtmp_t rtmp);
+extern int __srs_connect_server(srs_rtmp_t rtmp);
 // do simple handshake over socket.
-int __srs_do_simple_handshake(srs_rtmp_t rtmp);
+extern int __srs_do_simple_handshake(srs_rtmp_t rtmp);
 
 /**
 * connect to rtmp vhost/app
@@ -99,7 +109,7 @@ int __srs_do_simple_handshake(srs_rtmp_t rtmp);
 * next: publish or play
 * @return 0, success; otherwise, failed.
 */
-int srs_connect_app(srs_rtmp_t rtmp);
+extern int srs_connect_app(srs_rtmp_t rtmp);
 
 /**
 * connect to server, get the debug srs info.
@@ -112,7 +122,7 @@ int srs_connect_app(srs_rtmp_t rtmp);
 * @param srs_id, int, debug info, client id in server log.
 * @param srs_pid, int, debug info, server pid in log.
 */
-int srs_connect_app2(srs_rtmp_t rtmp,
+extern int srs_connect_app2(srs_rtmp_t rtmp,
     char srs_server_ip[128], char srs_server[128], char srs_primary_authors[128], 
     char srs_version[32], int* srs_id, int* srs_pid
 );
@@ -124,7 +134,7 @@ int srs_connect_app2(srs_rtmp_t rtmp,
 * next: destroy
 * @return 0, success; otherwise, failed.
 */
-int srs_play_stream(srs_rtmp_t rtmp);
+extern int srs_play_stream(srs_rtmp_t rtmp);
 
 /**
 * publish a live stream.
@@ -133,7 +143,7 @@ int srs_play_stream(srs_rtmp_t rtmp);
 * next: destroy
 * @return 0, success; otherwise, failed.
 */
-int srs_publish_stream(srs_rtmp_t rtmp);
+extern int srs_publish_stream(srs_rtmp_t rtmp);
 
 /**
 * do bandwidth check with srs server.
@@ -148,7 +158,7 @@ int srs_publish_stream(srs_rtmp_t rtmp);
 * @param play_duration, output the play/download test duration, in ms.
 * @param publish_duration, output the publish/upload test duration, in ms.
 */
-int srs_bandwidth_check(srs_rtmp_t rtmp, 
+extern int srs_bandwidth_check(srs_rtmp_t rtmp, 
     int64_t* start_time, int64_t* end_time, 
     int* play_kbps, int* publish_kbps,
     int* play_bytes, int* publish_bytes,
@@ -173,7 +183,7 @@ int srs_bandwidth_check(srs_rtmp_t rtmp,
 * @remark user never free the return char*, 
 *   it's static shared const string.
 */
-const char* srs_type2string(int type);
+extern const char* srs_type2string(int type);
 /**
 * read a audio/video/script-data packet from rtmp stream.
 * @param type, output the packet type, macros:
@@ -191,113 +201,144 @@ const char* srs_type2string(int type);
 * @remark: for read, user must free the data.
 * @remark: for write, user should never free the data, even if error.
 */
-int srs_read_packet(srs_rtmp_t rtmp, int* type, u_int32_t* timestamp, char** data, int* size);
-int srs_write_packet(srs_rtmp_t rtmp, int type, u_int32_t timestamp, char* data, int size);
+extern int srs_read_packet(srs_rtmp_t rtmp, 
+    int* type, u_int32_t* timestamp, char** data, int* size
+);
+extern int srs_write_packet(srs_rtmp_t rtmp, 
+    int type, u_int32_t timestamp, char* data, int size
+);
 
-/**
-* get protocol stack version
-*/
-int srs_version_major();
-int srs_version_minor();
-int srs_version_revision();
+// get protocol stack version
+extern int srs_version_major();
+extern int srs_version_minor();
+extern int srs_version_revision();
 
-/**
+/*************************************************************
+**************************************************************
 * utilities
-*/
-int64_t srs_get_time_ms();
-int64_t srs_get_nsend_bytes(srs_rtmp_t rtmp);
-int64_t srs_get_nrecv_bytes(srs_rtmp_t rtmp);
+**************************************************************
+*************************************************************/
+extern int64_t srs_get_time_ms();
+extern int64_t srs_get_nsend_bytes(srs_rtmp_t rtmp);
+extern int64_t srs_get_nrecv_bytes(srs_rtmp_t rtmp);
 
-/**
+
+/*************************************************************
+**************************************************************
 * flv codec
-*/
+**************************************************************
+*************************************************************/
 typedef void* srs_flv_t;
 typedef int flv_bool;
 /* open flv file for both read/write. */
-srs_flv_t srs_flv_open_read(const char* file);
-srs_flv_t srs_flv_open_write(const char* file);
-void srs_flv_close(srs_flv_t flv);
+extern srs_flv_t srs_flv_open_read(const char* file);
+extern srs_flv_t srs_flv_open_write(const char* file);
+extern void srs_flv_close(srs_flv_t flv);
 /* read the flv header. 9bytes header. drop the 4bytes zero previous tag size */
-int srs_flv_read_header(srs_flv_t flv, char header[9]);
+extern int srs_flv_read_header(srs_flv_t flv, char header[9]);
 /* read the flv tag header, 1bytes tag, 3bytes data_size, 4bytes time, 3bytes stream id. */
-int srs_flv_read_tag_header(srs_flv_t flv, char* ptype, int32_t* pdata_size, u_int32_t* ptime);
+extern int srs_flv_read_tag_header(srs_flv_t flv, 
+    char* ptype, int32_t* pdata_size, u_int32_t* ptime
+);
 /* read the tag data. drop the 4bytes previous tag size */
-int srs_flv_read_tag_data(srs_flv_t flv, char* data, int32_t size);
+extern int srs_flv_read_tag_data(srs_flv_t flv, char* data, int32_t size);
 /* write flv header to file, auto write the 4bytes zero previous tag size. */
-int srs_flv_write_header(srs_flv_t flv, char header[9]);
+extern int srs_flv_write_header(srs_flv_t flv, char header[9]);
 /* write flv tag to file, auto write the 4bytes previous tag size */
-int srs_flv_write_tag(srs_flv_t flv, char type, int32_t time, char* data, int size);
+extern int srs_flv_write_tag(srs_flv_t flv, char type, int32_t time, char* data, int size);
 /* get the tag size, for flv injecter to adjust offset, size=tag_header+data+previous_tag */
-int srs_flv_size_tag(int data_size);
+extern int srs_flv_size_tag(int data_size);
 /* file stream */
 /* file stream tellg to get offset */
-int64_t srs_flv_tellg(srs_flv_t flv);
+extern int64_t srs_flv_tellg(srs_flv_t flv);
 /* seek file stream, offset is form the start of file */
-void srs_flv_lseek(srs_flv_t flv, int64_t offset);
+extern void srs_flv_lseek(srs_flv_t flv, int64_t offset);
 /* error code */
 /* whether the error code indicates EOF */
-flv_bool srs_flv_is_eof(int error_code);
+extern flv_bool srs_flv_is_eof(int error_code);
 /* media codec */
 /* whether the video body is sequence header */
-flv_bool srs_flv_is_sequence_header(char* data, int32_t size);
+extern flv_bool srs_flv_is_sequence_header(char* data, int32_t size);
 /* whether the video body is keyframe */
-flv_bool srs_flv_is_keyframe(char* data, int32_t size);
+extern flv_bool srs_flv_is_keyframe(char* data, int32_t size);
 
-/**
+/*************************************************************
+**************************************************************
 * amf0 codec
-*/
+**************************************************************
+*************************************************************/
 /* the output handler. */
 typedef void* srs_amf0_t;
 typedef int amf0_bool;
 typedef double amf0_number;
-srs_amf0_t srs_amf0_parse(char* data, int size, int* nparsed);
-srs_amf0_t srs_amf0_create_number(amf0_number value);
-srs_amf0_t srs_amf0_create_ecma_array();
-srs_amf0_t srs_amf0_create_strict_array();
-srs_amf0_t srs_amf0_create_object();
-void srs_amf0_free(srs_amf0_t amf0);
-void srs_amf0_free_bytes(char* data);
+extern srs_amf0_t srs_amf0_parse(char* data, int size, int* nparsed);
+extern srs_amf0_t srs_amf0_create_number(amf0_number value);
+extern srs_amf0_t srs_amf0_create_ecma_array();
+extern srs_amf0_t srs_amf0_create_strict_array();
+extern srs_amf0_t srs_amf0_create_object();
+extern void srs_amf0_free(srs_amf0_t amf0);
+extern void srs_amf0_free_bytes(char* data);
 /* size and to bytes */
-int srs_amf0_size(srs_amf0_t amf0);
-int srs_amf0_serialize(srs_amf0_t amf0, char* data, int size);
+extern int srs_amf0_size(srs_amf0_t amf0);
+extern int srs_amf0_serialize(srs_amf0_t amf0, char* data, int size);
 /* type detecter */
-amf0_bool srs_amf0_is_string(srs_amf0_t amf0);
-amf0_bool srs_amf0_is_boolean(srs_amf0_t amf0);
-amf0_bool srs_amf0_is_number(srs_amf0_t amf0);
-amf0_bool srs_amf0_is_null(srs_amf0_t amf0);
-amf0_bool srs_amf0_is_object(srs_amf0_t amf0);
-amf0_bool srs_amf0_is_ecma_array(srs_amf0_t amf0);
-amf0_bool srs_amf0_is_strict_array(srs_amf0_t amf0);
+extern amf0_bool srs_amf0_is_string(srs_amf0_t amf0);
+extern amf0_bool srs_amf0_is_boolean(srs_amf0_t amf0);
+extern amf0_bool srs_amf0_is_number(srs_amf0_t amf0);
+extern amf0_bool srs_amf0_is_null(srs_amf0_t amf0);
+extern amf0_bool srs_amf0_is_object(srs_amf0_t amf0);
+extern amf0_bool srs_amf0_is_ecma_array(srs_amf0_t amf0);
+extern amf0_bool srs_amf0_is_strict_array(srs_amf0_t amf0);
 /* value converter */
-const char* srs_amf0_to_string(srs_amf0_t amf0);
-amf0_bool srs_amf0_to_boolean(srs_amf0_t amf0);
-amf0_number srs_amf0_to_number(srs_amf0_t amf0);
+extern const char* srs_amf0_to_string(srs_amf0_t amf0);
+extern amf0_bool srs_amf0_to_boolean(srs_amf0_t amf0);
+extern amf0_number srs_amf0_to_number(srs_amf0_t amf0);
 /* value setter */
-void srs_amf0_set_number(srs_amf0_t amf0, amf0_number value);
+extern void srs_amf0_set_number(srs_amf0_t amf0, amf0_number value);
 /* object value converter */
-int srs_amf0_object_property_count(srs_amf0_t amf0);
-const char* srs_amf0_object_property_name_at(srs_amf0_t amf0, int index);
-srs_amf0_t srs_amf0_object_property_value_at(srs_amf0_t amf0, int index);
-srs_amf0_t srs_amf0_object_property(srs_amf0_t amf0, const char* name);
-void srs_amf0_object_property_set(srs_amf0_t amf0, const char* name, srs_amf0_t value);
-void srs_amf0_object_clear(srs_amf0_t amf0);
+extern int srs_amf0_object_property_count(srs_amf0_t amf0);
+extern const char* srs_amf0_object_property_name_at(srs_amf0_t amf0, int index);
+extern srs_amf0_t srs_amf0_object_property_value_at(srs_amf0_t amf0, int index);
+extern srs_amf0_t srs_amf0_object_property(srs_amf0_t amf0, const char* name);
+extern void srs_amf0_object_property_set(srs_amf0_t amf0, const char* name, srs_amf0_t value);
+extern void srs_amf0_object_clear(srs_amf0_t amf0);
 /* ecma array value converter */
-int srs_amf0_ecma_array_property_count(srs_amf0_t amf0);
-const char* srs_amf0_ecma_array_property_name_at(srs_amf0_t amf0, int index);
-srs_amf0_t srs_amf0_ecma_array_property_value_at(srs_amf0_t amf0, int index);
-srs_amf0_t srs_amf0_ecma_array_property(srs_amf0_t amf0, const char* name);
-void srs_amf0_ecma_array_property_set(srs_amf0_t amf0, const char* name, srs_amf0_t value);
+extern int srs_amf0_ecma_array_property_count(srs_amf0_t amf0);
+extern const char* srs_amf0_ecma_array_property_name_at(srs_amf0_t amf0, int index);
+extern srs_amf0_t srs_amf0_ecma_array_property_value_at(srs_amf0_t amf0, int index);
+extern srs_amf0_t srs_amf0_ecma_array_property(srs_amf0_t amf0, const char* name);
+extern void srs_amf0_ecma_array_property_set(srs_amf0_t amf0, const char* name, srs_amf0_t value);
 /* strict array value converter */
-int srs_amf0_strict_array_property_count(srs_amf0_t amf0);
-srs_amf0_t srs_amf0_strict_array_property_at(srs_amf0_t amf0, int index);
-void srs_amf0_strict_array_append(srs_amf0_t amf0, srs_amf0_t value);
+extern int srs_amf0_strict_array_property_count(srs_amf0_t amf0);
+extern srs_amf0_t srs_amf0_strict_array_property_at(srs_amf0_t amf0, int index);
+extern void srs_amf0_strict_array_append(srs_amf0_t amf0, srs_amf0_t value);
 /**
 * human readable print 
 * @param pdata, output the heap data, NULL to ignore.
 * user must use srs_amf0_free_bytes to free it.
 * @return return the *pdata for print. NULL to ignore.
 */
-char* srs_amf0_human_print(srs_amf0_t amf0, char** pdata, int* psize);
+extern char* srs_amf0_human_print(srs_amf0_t amf0, char** pdata, int* psize);
+
+/*************************************************************
+**************************************************************
+* h264 raw codec
+**************************************************************
+*************************************************************/
+/**
+convert h264 stream data to rtmp packet.
+@param h264_raw_data the input h264 raw data, a encoded h.264 I/P/B frame data.
+@paam h264_raw_size the size of h264 raw data.
+@param dts the dts of h.264 raw data.
+@param pts the pts of h.264 raw data.
+@param prtmp_data the output rtmp format packet, which can be send by srs_write_packet.
+@param prtmp_size the size of rtmp packet, for srs_write_packet.
+@param ptimestamp the timestamp of rtmp packet, for srs_write_packet.
+*/
+extern int srs_h264_to_rtmp(
+    char* h264_raw_data, int h264_raw_size, u_int32_t dts, u_int32_t pts,
+    char** prtmp_data, int* prtmp_size, u_int32_t* ptimestamp
+);
 
 #ifdef __cplusplus
 }