diff --git a/app/demo/calcrtmpdelay/calcrtmpdelay.go b/app/demo/calcrtmpdelay/calcrtmpdelay.go
index 7326a779..394547d2 100644
--- a/app/demo/calcrtmpdelay/calcrtmpdelay.go
+++ b/app/demo/calcrtmpdelay/calcrtmpdelay.go
@@ -92,12 +92,12 @@ func main() {
 
 	switch pullType {
 	case PullTypeHttpflv:
-		httpflvPullSession = httpflv.NewPullSession()
-		err = httpflvPullSession.Pull(pullUrl, func(tag httpflv.Tag) {
+		httpflvPullSession = httpflv.NewPullSession().WithOnReadFlvTag(func(tag httpflv.Tag) {
 			handleReadPayloadFn(tag.Payload())
 		})
-		if err != nil {
+		if err = httpflvPullSession.Start(pullUrl); err != nil {
 			nazalog.Fatalf("pull flv failed. err=%+v", err)
+			return
 		}
 		nazalog.Info("pull flv succ.")
 		defer httpflvPullSession.Dispose()
diff --git a/app/demo/pullhttpflv/pullhttpflv.go b/app/demo/pullhttpflv/pullhttpflv.go
index 52b296cd..b3d7908d 100644
--- a/app/demo/pullhttpflv/pullhttpflv.go
+++ b/app/demo/pullhttpflv/pullhttpflv.go
@@ -37,8 +37,7 @@ func main() {
 
 	defer flvfile.Close()
 
-	session := httpflv.NewPullSession()
-	err = session.Pull(url, func(tag httpflv.Tag) {
+	session := httpflv.NewPullSession().WithOnReadFlvTag(func(tag httpflv.Tag) {
 		if tag.Header.Type == httpflv.TagTypeMetadata {
 			// TODO(chef): httpflv.PullSession支持返回flv header，可供业务方选择使用 202210
 			// 根据metadata填写flv头
@@ -69,6 +68,8 @@ func main() {
 
 		flvfile.Write(tag.Raw)
 	})
+
+	err = session.Start(url)
 	nazalog.Assert(nil, err)
 	err = <-session.WaitChan()
 	nazalog.Assert(nil, err)
diff --git a/pkg/httpflv/client_pull_session.go b/pkg/httpflv/client_pull_session.go
index 56af37bc..87f0b2b4 100644
--- a/pkg/httpflv/client_pull_session.go
+++ b/pkg/httpflv/client_pull_session.go
@@ -91,7 +91,7 @@ func (session *PullSession) Start(rawUrl string) error {
 	return session.pull(rawUrl)
 }
 
-// Pull deprecated. use Start instead.
+// Pull deprecated. use WithOnReadFlvTag and Start instead.
 func (session *PullSession) Pull(rawUrl string, onReadFlvTag OnReadFlvTag) error {
 	return session.WithOnReadFlvTag(onReadFlvTag).Start(rawUrl)
 }
diff --git a/pkg/innertest/innertest.go b/pkg/innertest/innertest.go
index 9cd3a418..09788591 100644
--- a/pkg/innertest/innertest.go
+++ b/pkg/innertest/innertest.go
@@ -232,13 +232,13 @@ func entry() {
 		var flvErr error
 		httpflvPullSession = httpflv.NewPullSession(func(option *httpflv.PullSessionOption) {
 			option.ReadTimeoutMs = 10000
-		})
-		err := httpflvPullSession.Pull(httpflvPullUrl, func(tag httpflv.Tag) {
-			err := httpFlvWriter.WriteTag(tag)
-			assert.Equal(t, nil, err)
+		}).WithOnReadFlvTag(func(tag httpflv.Tag) {
+			errWrite := httpFlvWriter.WriteTag(tag)
+			assert.Equal(t, nil, errWrite)
 			httpflvPullTagCount.Increment()
 		})
-		Log.Assert(nil, err)
+		errStart := httpflvPullSession.Start(httpflvPullUrl)
+		Log.Assert(nil, errStart)
 		flvErr = <-httpflvPullSession.WaitChan()
 		Log.Debug(flvErr)