call http api when dvr got keyframe

@@ -96,6 +96,8 @@ vhost dvr.srs.com {
     # dvr RTMP stream to file,
     # dvr RTMP stream to file,
     # start to record to file when encoder publish,
     # start to record to file when encoder publish,
     # reap flv according by specified dvr_plan.
     # reap flv according by specified dvr_plan.
+    # http callbacks:
+    # @see http callback on_dvr_keyframe on http_hooks section.
     dvr {
     dvr {
         # whether enabled dvr features
         # whether enabled dvr features
         # default: off
         # default: off
@@ -320,6 +322,19 @@ vhost hooks.callback.srs.com {
         # support multiple api hooks, format:
         # support multiple api hooks, format:
         #       on_stop http://xxx/api0 http://xxx/api1 http://xxx/apiN
         #       on_stop http://xxx/api0 http://xxx/api1 http://xxx/apiN
         on_stop         http://127.0.0.1:8085/api/v1/sessions http://localhost:8085/api/v1/sessions;
         on_stop         http://127.0.0.1:8085/api/v1/sessions http://localhost:8085/api/v1/sessions;
+        # when dvr got an keyframe, call the hook,
+        # the request in the POST data string is a object encode by json:
+        #       {
+        #           "action": "on_dvr_keyframe",
+        #           "vhost": "video.test.com", "app": "live",
+        #           "stream": "livestream"
+        #       }
+        # if valid, the hook must return HTTP code 200(Stauts OK) and response
+        # an int value specifies the error code(0 corresponding to success):
+        #       0
+        # support multiple api hooks, format:
+        #       on_stop http://xxx/api0 http://xxx/api1 http://xxx/apiN
+        on_dvr_keyframe     http://127.0.0.1:8085/api/v1/dvrs http://localhost:8085/api/v1/dvrs;
     }
     }
 }
 }
 
 

@@ -1560,6 +1560,27 @@ SrsConfDirective* SrsConfig::get_vhost_on_stop(string vhost)
     return conf->get("on_stop");
     return conf->get("on_stop");
 }
 }
 
 
+SrsConfDirective* SrsConfig::get_vhost_on_dvr_keyframe(string vhost)
+{
+    SrsConfDirective* conf = get_vhost(vhost);
+
+    if (!conf) { 
+        return NULL;
+    }
+    
+    conf = conf->get("http_hooks");
+    if (!conf) {
+        return NULL;
+    }
+    
+    SrsConfDirective* enabled = conf->get("enabled");
+    if (!enabled || enabled->arg0() != "on") {
+        return NULL;
+    }
+    
+    return conf->get("on_dvr_keyframe");
+}
+
 bool SrsConfig::get_vhost_enabled(string vhost)
 bool SrsConfig::get_vhost_enabled(string vhost)
 {
 {
     SrsConfDirective* vhost_conf = get_vhost(vhost);
     SrsConfDirective* vhost_conf = get_vhost(vhost);

@@ -173,6 +173,7 @@ public:
     virtual SrsConfDirective*   get_vhost_on_unpublish(std::string vhost);
     virtual SrsConfDirective*   get_vhost_on_unpublish(std::string vhost);
     virtual SrsConfDirective*   get_vhost_on_play(std::string vhost);
     virtual SrsConfDirective*   get_vhost_on_play(std::string vhost);
     virtual SrsConfDirective*   get_vhost_on_stop(std::string vhost);
     virtual SrsConfDirective*   get_vhost_on_stop(std::string vhost);
+    virtual SrsConfDirective*   get_vhost_on_dvr_keyframe(std::string vhost);
     virtual bool                get_gop_cache(std::string vhost);
     virtual bool                get_gop_cache(std::string vhost);
     virtual bool                get_atc(std::string vhost);
     virtual bool                get_atc(std::string vhost);
     virtual double              get_queue_length(std::string vhost);
     virtual double              get_queue_length(std::string vhost);

@@ -37,6 +37,8 @@ using namespace std;
 #include <srs_core_autofree.hpp>
 #include <srs_core_autofree.hpp>
 #include <srs_kernel_stream.hpp>
 #include <srs_kernel_stream.hpp>
 #include <srs_kernel_utility.hpp>
 #include <srs_kernel_utility.hpp>
+#include <srs_app_http_hooks.hpp>
+#include <srs_app_codec.hpp>
 
 
 SrsFileStream::SrsFileStream()
 SrsFileStream::SrsFileStream()
 {
 {
@@ -364,34 +366,6 @@ int SrsDvrPlan::on_publish()
     return ret;
     return ret;
 }
 }
 
 
-int SrsDvrPlan::flv_open(string stream, string path)
-{
-    int ret = ERROR_SUCCESS;
-    
-    if ((ret = fs->open(path)) != ERROR_SUCCESS) {
-        srs_error("open file stream for file %s failed. ret=%d", path.c_str(), ret);
-        return ret;
-    }
-    
-    if ((ret = enc->initialize(fs)) != ERROR_SUCCESS) {
-        srs_error("initialize enc by fs for file %s failed. ret=%d", path.c_str(), ret);
-        return ret;
-    }
-    
-    if ((ret = enc->write_header()) != ERROR_SUCCESS) {
-        srs_error("write flv header for file %s failed. ret=%d", path.c_str(), ret);
-        return ret;
-    }
-    
-    srs_trace("dvr stream %s to file %s", stream.c_str(), path.c_str());
-    return ret;
-}
-
-int SrsDvrPlan::flv_close()
-{
-    return fs->close();
-}
-
 int SrsDvrPlan::on_meta_data(SrsOnMetaDataPacket* metadata)
 int SrsDvrPlan::on_meta_data(SrsOnMetaDataPacket* metadata)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
@@ -459,6 +433,16 @@ int SrsDvrPlan::on_video(SrsSharedPtrMessage* video)
         return ret;
         return ret;
     }
     }
     
     
+#ifdef SRS_AUTO_HTTP_CALLBACK
+    bool is_key_frame = SrsCodec::video_is_keyframe((int8_t*)payload, size);
+    srs_verbose("dvr video is key: %d", is_key_frame);
+    if (is_key_frame) {
+        if ((ret = on_dvr_keyframe()) != ERROR_SUCCESS) {
+            return ret;
+        }
+    }
+#endif
+    
     if ((ret = on_video_msg(video)) != ERROR_SUCCESS) {
     if ((ret = on_video_msg(video)) != ERROR_SUCCESS) {
         return ret;
         return ret;
     }
     }
@@ -466,6 +450,29 @@ int SrsDvrPlan::on_video(SrsSharedPtrMessage* video)
     return ret;
     return ret;
 }
 }
 
 
+int SrsDvrPlan::flv_open(string stream, string path)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if ((ret = fs->open(path)) != ERROR_SUCCESS) {
+        srs_error("open file stream for file %s failed. ret=%d", path.c_str(), ret);
+        return ret;
+    }
+    
+    if ((ret = enc->initialize(fs)) != ERROR_SUCCESS) {
+        srs_error("initialize enc by fs for file %s failed. ret=%d", path.c_str(), ret);
+        return ret;
+    }
+    
+    if ((ret = enc->write_header()) != ERROR_SUCCESS) {
+        srs_error("write flv header for file %s failed. ret=%d", path.c_str(), ret);
+        return ret;
+    }
+    
+    srs_trace("dvr stream %s to file %s", stream.c_str(), path.c_str());
+    return ret;
+}
+
 int SrsDvrPlan::on_audio_msg(SrsSharedPtrMessage* /*audio*/)
 int SrsDvrPlan::on_audio_msg(SrsSharedPtrMessage* /*audio*/)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
@@ -478,6 +485,32 @@ int SrsDvrPlan::on_video_msg(SrsSharedPtrMessage* /*video*/)
     return ret;
     return ret;
 }
 }
 
 
+int SrsDvrPlan::flv_close()
+{
+    return fs->close();
+}
+
+int SrsDvrPlan::on_dvr_keyframe()
+{
+    int ret = ERROR_SUCCESS;
+    
+#ifdef SRS_AUTO_HTTP_CALLBACK
+    // HTTP: on_dvr_keyframe 
+    SrsConfDirective* on_dvr_keyframe = _srs_config->get_vhost_on_dvr_keyframe(_req->vhost);
+    if (!on_dvr_keyframe) {
+        srs_info("ignore the empty http callback: on_dvr_keyframe");
+        return ret;
+    }
+    
+    for (int i = 0; i < (int)on_dvr_keyframe->args.size(); i++) {
+        std::string url = on_dvr_keyframe->args.at(i);
+        SrsHttpHooks::on_dvr_keyframe(url, _req);
+    }
+#endif
+    
+    return ret;
+}
+
 SrsDvrPlan* SrsDvrPlan::create_plan(string vhost)
 SrsDvrPlan* SrsDvrPlan::create_plan(string vhost)
 {
 {
     std::string plan = _srs_config->get_dvr_plan(vhost);
     std::string plan = _srs_config->get_dvr_plan(vhost);

@@ -146,6 +146,8 @@ protected:
     virtual int on_audio_msg(SrsSharedPtrMessage* audio);
     virtual int on_audio_msg(SrsSharedPtrMessage* audio);
     virtual int on_video_msg(SrsSharedPtrMessage* video);
     virtual int on_video_msg(SrsSharedPtrMessage* video);
     virtual int flv_close();
     virtual int flv_close();
+private:
+    virtual int on_dvr_keyframe();
 public:
 public:
     static SrsDvrPlan* create_plan(std::string vhost);
     static SrsDvrPlan* create_plan(std::string vhost);
 };
 };

@@ -55,7 +55,7 @@ SrsHttpClient::~SrsHttpClient()
     srs_freep(parser);
     srs_freep(parser);
 }
 }
 
 
-int SrsHttpClient::post(SrsHttpUri* uri, std::string req, std::string& res)
+int SrsHttpClient::post(SrsHttpUri* uri, string req, string& res)
 {
 {
     res = "";
     res = "";
     
     
@@ -183,7 +183,7 @@ SrsHttpHooks::~SrsHttpHooks()
 {
 {
 }
 }
 
 
-int SrsHttpHooks::on_connect(std::string url, int client_id, std::string ip, SrsRequest* req)
+int SrsHttpHooks::on_connect(string url, int client_id, string ip, SrsRequest* req)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
@@ -236,7 +236,7 @@ int SrsHttpHooks::on_connect(std::string url, int client_id, std::string ip, Srs
     return ret;
     return ret;
 }
 }
 
 
-void SrsHttpHooks::on_close(std::string url, int client_id, std::string ip, SrsRequest* req)
+void SrsHttpHooks::on_close(string url, int client_id, string ip, SrsRequest* req)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
@@ -289,7 +289,7 @@ void SrsHttpHooks::on_close(std::string url, int client_id, std::string ip, SrsR
     return;
     return;
 }
 }
 
 
-int SrsHttpHooks::on_publish(std::string url, int client_id, std::string ip, SrsRequest* req)
+int SrsHttpHooks::on_publish(string url, int client_id, string ip, SrsRequest* req)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
@@ -343,7 +343,7 @@ int SrsHttpHooks::on_publish(std::string url, int client_id, std::string ip, Srs
     return ret;
     return ret;
 }
 }
 
 
-void SrsHttpHooks::on_unpublish(std::string url, int client_id, std::string ip, SrsRequest* req)
+void SrsHttpHooks::on_unpublish(string url, int client_id, string ip, SrsRequest* req)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
@@ -397,7 +397,7 @@ void SrsHttpHooks::on_unpublish(std::string url, int client_id, std::string ip,
     return;
     return;
 }
 }
 
 
-int SrsHttpHooks::on_play(std::string url, int client_id, std::string ip, SrsRequest* req)
+int SrsHttpHooks::on_play(string url, int client_id, string ip, SrsRequest* req)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
@@ -451,7 +451,7 @@ int SrsHttpHooks::on_play(std::string url, int client_id, std::string ip, SrsReq
     return ret;
     return ret;
 }
 }
 
 
-void SrsHttpHooks::on_stop(std::string url, int client_id, std::string ip, SrsRequest* req)
+void SrsHttpHooks::on_stop(string url, int client_id, string ip, SrsRequest* req)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
@@ -505,4 +505,54 @@ void SrsHttpHooks::on_stop(std::string url, int client_id, std::string ip, SrsRe
     return;
     return;
 }
 }
 
 
+void SrsHttpHooks::on_dvr_keyframe(string url, SrsRequest* req)
+{
+    int ret = ERROR_SUCCESS;
+    
+    SrsHttpUri uri;
+    if ((ret = uri.initialize(url)) != ERROR_SUCCESS) {
+        srs_warn("http uri parse on_dvr_keyframe url failed, ignored. "
+            "url=%s, ret=%d", url.c_str(), ret);
+        return;
+    }
+    
+    /**
+    {
+        "action": "on_dvr_keyframe",
+        "vhost": "video.test.com", "app": "live",
+        "stream": "livestream"
+    }
+    */
+    std::stringstream ss;
+    ss << JOBJECT_START
+        << JFIELD_STR("action", "on_dvr_keyframe") << JFIELD_CONT
+        << JFIELD_STR("vhost", req->vhost) << JFIELD_CONT
+        << JFIELD_STR("app", req->app) << JFIELD_CONT
+        << JFIELD_STR("stream", req->stream)
+        << JOBJECT_END;
+    std::string data = ss.str();
+    std::string res;
+    
+    SrsHttpClient http;
+    if ((ret = http.post(&uri, data, res)) != ERROR_SUCCESS) {
+        srs_warn("http post on_dvr_keyframe uri failed, ignored. "
+            "url=%s, request=%s, response=%s, ret=%d",
+            url.c_str(), data.c_str(), res.c_str(), ret);
+        return;
+    }
+    
+    if (res.empty() || res != SRS_HTTP_RESPONSE_OK) {
+        ret = ERROR_HTTP_DATA_INVLIAD;
+        srs_warn("http hook on_dvr_keyframe validate failed, ignored. "
+            "res=%s, ret=%d", res.c_str(), ret);
+        return;
+    }
+    
+    srs_trace("http hook on_dvr_keyframe success. "
+        "url=%s, request=%s, response=%s, ret=%d",
+        url.c_str(), data.c_str(), res.c_str(), ret);
+    
+    return;
+}
+
 #endif
 #endif

@@ -71,8 +71,9 @@ private:
 */
 */
 class SrsHttpHooks
 class SrsHttpHooks
 {
 {
-public:
+private:
     SrsHttpHooks();
     SrsHttpHooks();
+public:
     virtual ~SrsHttpHooks();
     virtual ~SrsHttpHooks();
 public:
 public:
     /**
     /**
@@ -82,14 +83,14 @@ public:
     *         ignore if empty.
     *         ignore if empty.
     * @return valid failed or connect to the url failed.
     * @return valid failed or connect to the url failed.
     */
     */
-    virtual int on_connect(std::string url, int client_id, std::string ip, SrsRequest* req);
+    static int on_connect(std::string url, int client_id, std::string ip, SrsRequest* req);
     /**
     /**
     * on_close hook, when client disconnect to srs, where client is valid by on_connect.
     * on_close hook, when client disconnect to srs, where client is valid by on_connect.
     * @param client_id the id of client on server.
     * @param client_id the id of client on server.
     * @param url the api server url, to process the event. 
     * @param url the api server url, to process the event. 
     *         ignore if empty.
     *         ignore if empty.
     */
     */
-    virtual void on_close(std::string url, int client_id, std::string ip, SrsRequest* req);
+    static void on_close(std::string url, int client_id, std::string ip, SrsRequest* req);
     /**
     /**
     * on_publish hook, when client(encoder) start to publish stream
     * on_publish hook, when client(encoder) start to publish stream
     * @param client_id the id of client on server.
     * @param client_id the id of client on server.
@@ -97,14 +98,14 @@ public:
     *         ignore if empty.
     *         ignore if empty.
     * @return valid failed or connect to the url failed.
     * @return valid failed or connect to the url failed.
     */
     */
-    virtual int on_publish(std::string url, int client_id, std::string ip, SrsRequest* req);
+    static int on_publish(std::string url, int client_id, std::string ip, SrsRequest* req);
     /**
     /**
     * on_unpublish hook, when client(encoder) stop publish stream.
     * on_unpublish hook, when client(encoder) stop publish stream.
     * @param client_id the id of client on server.
     * @param client_id the id of client on server.
     * @param url the api server url, to process the event. 
     * @param url the api server url, to process the event. 
     *         ignore if empty.
     *         ignore if empty.
     */
     */
-    virtual void on_unpublish(std::string url, int client_id, std::string ip, SrsRequest* req);
+    static void on_unpublish(std::string url, int client_id, std::string ip, SrsRequest* req);
     /**
     /**
     * on_play hook, when client start to play stream.
     * on_play hook, when client start to play stream.
     * @param client_id the id of client on server.
     * @param client_id the id of client on server.
@@ -112,14 +113,21 @@ public:
     *         ignore if empty.
     *         ignore if empty.
     * @return valid failed or connect to the url failed.
     * @return valid failed or connect to the url failed.
     */
     */
-    virtual int on_play(std::string url, int client_id, std::string ip, SrsRequest* req);
+    static int on_play(std::string url, int client_id, std::string ip, SrsRequest* req);
     /**
     /**
     * on_stop hook, when client stop to play the stream.
     * on_stop hook, when client stop to play the stream.
     * @param client_id the id of client on server.
     * @param client_id the id of client on server.
     * @param url the api server url, to process the event. 
     * @param url the api server url, to process the event. 
     *         ignore if empty.
     *         ignore if empty.
     */
     */
-    virtual void on_stop(std::string url, int client_id, std::string ip, SrsRequest* req);
+    static void on_stop(std::string url, int client_id, std::string ip, SrsRequest* req);
+public:
+    /**
+    * on_dvr_keyframe hook, when dvr get keyframe.
+    * @param url the api server url, to process the event. 
+    *         ignore if empty.
+    */
+    static void on_dvr_keyframe(std::string url, SrsRequest* req);
 };
 };
 
 
 #endif
 #endif

@@ -68,9 +68,6 @@ SrsRtmpConn::SrsRtmpConn(SrsServer* srs_server, st_netfd_t client_stfd)
     skt = new SrsSocket(client_stfd);
     skt = new SrsSocket(client_stfd);
     rtmp = new SrsRtmpServer(skt);
     rtmp = new SrsRtmpServer(skt);
     refer = new SrsRefer();
     refer = new SrsRefer();
-#ifdef SRS_AUTO_HTTP_CALLBACK    
-    http_hooks = new SrsHttpHooks();
-#endif
     bandwidth = new SrsBandwidth();
     bandwidth = new SrsBandwidth();
     duration = 0;
     duration = 0;
     
     
@@ -86,9 +83,6 @@ SrsRtmpConn::~SrsRtmpConn()
     srs_freep(rtmp);
     srs_freep(rtmp);
     srs_freep(skt);
     srs_freep(skt);
     srs_freep(refer);
     srs_freep(refer);
-#ifdef SRS_AUTO_HTTP_CALLBACK    
-    srs_freep(http_hooks);
-#endif
     srs_freep(bandwidth);
     srs_freep(bandwidth);
 }
 }
 
 
@@ -730,7 +724,7 @@ int SrsRtmpConn::on_connect()
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
-#ifdef SRS_AUTO_HTTP_CALLBACK    
+#ifdef SRS_AUTO_HTTP_CALLBACK
     // HTTP: on_connect 
     // HTTP: on_connect 
     SrsConfDirective* on_connect = _srs_config->get_vhost_on_connect(req->vhost);
     SrsConfDirective* on_connect = _srs_config->get_vhost_on_connect(req->vhost);
     if (!on_connect) {
     if (!on_connect) {
@@ -740,7 +734,7 @@ int SrsRtmpConn::on_connect()
     
     
     for (int i = 0; i < (int)on_connect->args.size(); i++) {
     for (int i = 0; i < (int)on_connect->args.size(); i++) {
         std::string url = on_connect->args.at(i);
         std::string url = on_connect->args.at(i);
-        if ((ret = http_hooks->on_connect(url, connection_id, ip, req)) != ERROR_SUCCESS) {
+        if ((ret = SrsHttpHooks::on_connect(url, connection_id, ip, req)) != ERROR_SUCCESS) {
             srs_error("hook client on_connect failed. url=%s, ret=%d", url.c_str(), ret);
             srs_error("hook client on_connect failed. url=%s, ret=%d", url.c_str(), ret);
             return ret;
             return ret;
         }
         }
@@ -763,7 +757,7 @@ void SrsRtmpConn::on_close()
     
     
     for (int i = 0; i < (int)on_close->args.size(); i++) {
     for (int i = 0; i < (int)on_close->args.size(); i++) {
         std::string url = on_close->args.at(i);
         std::string url = on_close->args.at(i);
-        http_hooks->on_close(url, connection_id, ip, req);
+        SrsHttpHooks::on_close(url, connection_id, ip, req);
     }
     }
 #endif
 #endif
 }
 }
@@ -782,7 +776,7 @@ int SrsRtmpConn::on_publish()
     
     
     for (int i = 0; i < (int)on_publish->args.size(); i++) {
     for (int i = 0; i < (int)on_publish->args.size(); i++) {
         std::string url = on_publish->args.at(i);
         std::string url = on_publish->args.at(i);
-        if ((ret = http_hooks->on_publish(url, connection_id, ip, req)) != ERROR_SUCCESS) {
+        if ((ret = SrsHttpHooks::on_publish(url, connection_id, ip, req)) != ERROR_SUCCESS) {
             srs_error("hook client on_publish failed. url=%s, ret=%d", url.c_str(), ret);
             srs_error("hook client on_publish failed. url=%s, ret=%d", url.c_str(), ret);
             return ret;
             return ret;
         }
         }
@@ -805,7 +799,7 @@ void SrsRtmpConn::on_unpublish()
     
     
     for (int i = 0; i < (int)on_unpublish->args.size(); i++) {
     for (int i = 0; i < (int)on_unpublish->args.size(); i++) {
         std::string url = on_unpublish->args.at(i);
         std::string url = on_unpublish->args.at(i);
-        http_hooks->on_unpublish(url, connection_id, ip, req);
+        SrsHttpHooks::on_unpublish(url, connection_id, ip, req);
     }
     }
 #endif
 #endif
 }
 }
@@ -824,7 +818,7 @@ int SrsRtmpConn::on_play()
     
     
     for (int i = 0; i < (int)on_play->args.size(); i++) {
     for (int i = 0; i < (int)on_play->args.size(); i++) {
         std::string url = on_play->args.at(i);
         std::string url = on_play->args.at(i);
-        if ((ret = http_hooks->on_play(url, connection_id, ip, req)) != ERROR_SUCCESS) {
+        if ((ret = SrsHttpHooks::on_play(url, connection_id, ip, req)) != ERROR_SUCCESS) {
             srs_error("hook client on_play failed. url=%s, ret=%d", url.c_str(), ret);
             srs_error("hook client on_play failed. url=%s, ret=%d", url.c_str(), ret);
             return ret;
             return ret;
         }
         }
@@ -847,7 +841,7 @@ void SrsRtmpConn::on_stop()
     
     
     for (int i = 0; i < (int)on_stop->args.size(); i++) {
     for (int i = 0; i < (int)on_stop->args.size(); i++) {
         std::string url = on_stop->args.at(i);
         std::string url = on_stop->args.at(i);
-        http_hooks->on_stop(url, connection_id, ip, req);
+        SrsHttpHooks::on_stop(url, connection_id, ip, req);
     }
     }
 #endif
 #endif
 
 

@@ -58,9 +58,6 @@ private:
     SrsSocket* skt;
     SrsSocket* skt;
     SrsRtmpServer* rtmp;
     SrsRtmpServer* rtmp;
     SrsRefer* refer;
     SrsRefer* refer;
-#ifdef SRS_AUTO_HTTP_CALLBACK    
-    SrsHttpHooks* http_hooks;
-#endif
     SrsBandwidth* bandwidth;
     SrsBandwidth* bandwidth;
     // elapse duration in ms
     // elapse duration in ms
     // for live play duration, for instance, rtmpdump to record.
     // for live play duration, for instance, rtmpdump to record.