diff --git a/api.go b/api.go
index de1d4ef..46de85b 100644
--- a/api.go
+++ b/api.go
@@ -131,10 +131,11 @@ func startApiServer(addr string) {
 	apiServer.router.HandleFunc("/api/v1/streams/statistics", nil) // 统计所有推拉流
 
 	if stream.AppConfig.GB28181.Enable {
-		apiServer.router.HandleFunc("/ws/v1/gb28181/talk", apiServer.OnGBTalk)                        // 对讲的主讲人WebSocket连接
-		apiServer.router.HandleFunc("/api/v1/control/ws-talk/{device}/{channel}", apiServer.OnGBTalk) // 对讲的主讲人WebSocket连接
-		apiServer.router.HandleFunc("/api/v1/gb28181/source/create", withJsonParams(apiServer.OnGBOfferCreate, &SourceSDP{}))
-		apiServer.router.HandleFunc("/api/v1/gb28181/answer/set", withJsonParams(apiServer.OnGBSourceConnect, &SourceSDP{})) // 应答的sdp, 如果是active模式拉流, 设置对方的地址. 下载文件设置文件大小
+		apiServer.router.HandleFunc("/ws/v1/gb28181/talk", apiServer.OnGBTalk)                                                // 对讲的主讲人WebSocket连接
+		apiServer.router.HandleFunc("/api/v1/control/ws-talk/{device}/{channel}", apiServer.OnGBTalk)                         // 对讲的主讲人WebSocket连接
+		apiServer.router.HandleFunc("/api/v1/gb28181/source/create", withJsonParams(apiServer.OnGBOfferCreate, &SourceSDP{})) // 创建国标源
+		apiServer.router.HandleFunc("/api/v1/gb28181/answer/set", withJsonParams(apiServer.OnGBSourceConnect, &SourceSDP{}))  // 设置应答sdp, 如果是active模式拉流, 设置对方的地址. 下载文件设置文件大小
+		apiServer.router.HandleFunc("/api/v1/gb28181/speed/set", withJsonParams(apiServer.OnGBSpeedSet, &SourceSDP{}))
 	}
 
 	apiServer.router.HandleFunc("/api/v1/gc/force", func(writer http.ResponseWriter, request *http.Request) {
diff --git a/api_gb.go b/api_gb.go
index afbe86e..cab197f 100644
--- a/api_gb.go
+++ b/api_gb.go
@@ -24,20 +24,20 @@ const (
 )
 
 type SDP struct {
-	SessionName string `json:"session_name,omitempty"` // play/download/playback/talk/broadcast
-	Addr        string `json:"addr,omitempty"`         // 连接地址
-	SSRC        string `json:"ssrc,omitempty"`
-	Setup       string `json:"setup,omitempty"`     // active/passive
-	Transport   string `json:"transport,omitempty"` // tcp/udp
-	Speed       int    `json:"speed,omitempty"`
-	StartTime   int    `json:"start_time,omitempty"`
-	EndTime     int    `json:"end_time,omitempty"`
-	FileSize    int    `json:"file_size,omitempty"`
+	SessionName string  `json:"session_name,omitempty"` // play/download/playback/talk/broadcast
+	Addr        string  `json:"addr,omitempty"`         // 连接地址
+	SSRC        string  `json:"ssrc,omitempty"`
+	Setup       string  `json:"setup,omitempty"`     // active/passive
+	Transport   string  `json:"transport,omitempty"` // tcp/udp
+	Speed       float64 `json:"speed,omitempty"`
+	StartTime   int     `json:"start_time,omitempty"`
+	EndTime     int     `json:"end_time,omitempty"`
+	FileSize    int     `json:"file_size,omitempty"`
 }
 
 type DownloadInfo struct {
 	PlaybackDuration  int     // 回放/下载时长
-	PlaybackSpeed     int     // 回放/下载速度
+	PlaybackSpeed     float64 // 回放/下载速度
 	PlaybackFileURL   string  // 回放/下载文件URL
 	PlaybackStartTime string  // 回放/下载开始时间
 	PlaybackEndTime   string  // 回放/下载结束时间
@@ -370,3 +370,16 @@ func (api *ApiServer) OnLiveGBSTalk(w http.ResponseWriter, r *http.Request) {
 
 	talkSource.Close()
 }
+
+func (api *ApiServer) OnGBSpeedSet(v *SourceSDP, w http.ResponseWriter, r *http.Request) {
+	source := stream.SourceManager.Find(v.Source)
+	if source == nil {
+		w.WriteHeader(http.StatusBadRequest)
+		httpResponseError(w, "stream not found")
+	} else if stream.SourceType28181 != source.GetType() {
+		w.WriteHeader(http.StatusBadRequest)
+		httpResponseError(w, "stream type not support")
+	} else if gbSource := Source2GBSource(source); gbSource != nil {
+		gbSource.SetSpeed(v.Speed)
+	}
+}
diff --git a/gb28181/source.go b/gb28181/source.go
index ce0c371..df85592 100644
--- a/gb28181/source.go
+++ b/gb28181/source.go
@@ -80,7 +80,7 @@ type GBSource interface {
 	SetTransport(transport transport.Transport)
 
 	GetDuration() int
-	GetSpeed() int
+	GetSpeed() float64
 	GetSessionName() string
 	GetStartTime() string
 	GetEndTime() string
@@ -88,7 +88,7 @@ type GBSource interface {
 	GetPlaybackProgress() float64
 
 	SetDuration(duration int)
-	SetSpeed(speed int)
+	SetSpeed(speed float64)
 	SetSessionName(sessionName string)
 	SetStartTime(startTime string)
 	SetEndTime(endTime string)
@@ -112,7 +112,7 @@ type BaseGBSource struct {
 
 	sessionName      string  // play/playback/download...
 	duration         int     // 回放/下载时长, 单位秒
-	speed            int     // 回放/下载速度
+	speed            float64 // 回放/下载速度
 	startTime        string  // 回放/下载开始时间
 	endTime          string  // 回放/下载结束时间
 	fileSize         int     // 回放/下载文件大小
@@ -345,7 +345,7 @@ func (source *BaseGBSource) GetDuration() int {
 	return source.duration
 }
 
-func (source *BaseGBSource) GetSpeed() int {
+func (source *BaseGBSource) GetSpeed() float64 {
 	return source.speed
 }
 
@@ -353,7 +353,7 @@ func (source *BaseGBSource) SetDuration(duration int) {
 	source.duration = duration
 }
 
-func (source *BaseGBSource) SetSpeed(speed int) {
+func (source *BaseGBSource) SetSpeed(speed float64) {
 	source.speed = speed
 }