diff --git a/README.en.md b/README.en.md
index 96660f5..bb117a3 100644
--- a/README.en.md
+++ b/README.en.md
@@ -52,7 +52,7 @@ rtsp:
     rtcpaddr: :8001
     readbuffercount: 2048
     writebuffercount: 2048
-    pullprotocol: 'auto' # auto, tcp, udp
+    pullprotocol: tcp # auto, tcp, udp
 ```
 :::tip Configuration override
 publish and subscribe, any section not configured will use global configuration.
@@ -65,6 +65,7 @@ Get all RTSP streams
 
 ### `rtsp/api/pull?target=[RTSP address]&streamPath=[Stream identity]&save=[0|1|2]`
 Pull the RTSP to m7s from a remote server
-save meaning: 0, do not save; 1, save to pullonstart; 2, save to pullonsub
+- save meaning: 0, do not save; 1, save to pullonstart; 2, save to pullonsub
+- The RTSP address needs to be urlencoded to prevent special characters from affecting parsing
 ### `rtsp/api/push?target=[RTSP address]&streamPath=[Stream identity]`
 Push local streams to remote servers
\ No newline at end of file
diff --git a/README.md b/README.md
index 35c29fe..0bb6882 100644
--- a/README.md
+++ b/README.md
@@ -49,7 +49,7 @@ rtsp:
     rtcpaddr: :8001
     readbuffercount: 2048 # 读取缓存队列大小
     writebuffercount: 2048 # 写出缓存队列大小
-    pullprotocol: 'auto' # auto, tcp, udp
+    pullprotocol: tcp # auto, tcp, udp
 ```
 :::tip 配置覆盖
 publish
@@ -63,6 +63,7 @@ subscribe
 
 ### `rtsp/api/pull?target=[RTSP地址]&streamPath=[流标识]&save=[0|1|2]`
 从远程拉取rtsp到m7s中
-save含义：0、不保存；1、保存到pullonstart；2、保存到pullonsub
+- save含义：0、不保存；1、保存到pullonstart；2、保存到pullonsub
+- RTSP地址需要进行urlencode 防止其中的特殊字符影响解析
 ### `rtsp/api/push?target=[RTSP地址]&streamPath=[流标识]`
 将本地的流推送到远端
\ No newline at end of file
diff --git a/publisher.go b/publisher.go
index 31a5594..81c8bc4 100644
--- a/publisher.go
+++ b/publisher.go
@@ -1,6 +1,8 @@
 package rtsp
 
 import (
+	"strings"
+
 	"github.com/bluenviron/gortsplib/v3/pkg/formats"
 	"github.com/bluenviron/gortsplib/v3/pkg/media"
 	"github.com/bluenviron/mediacommon/pkg/codecs/mpeg4audio"
@@ -81,8 +83,7 @@ func (p *RTSPPublisher) SetTracks() error {
 				}
 				p.Tracks[track] = p.AudioTrack
 			default:
-				rtpMap, _ := forma.Marshal()
-				rtpMap = strings.ToLower(rtpMap)
+				rtpMap := strings.ToLower(forma.RTPMap())
 				if strings.Contains(rtpMap, "pcm") {
 					isMulaw := false
 					if strings.Contains(rtpMap, "pcmu") {
@@ -96,7 +97,7 @@ func (p *RTSPPublisher) SetTracks() error {
 					p.Tracks[track] = p.AudioTrack
 				} else {
 					p.Error("unknown format", zap.Any("format", f.String()))
-				}				
+				}
 			}
 		}
 	}