diff --git a/Demo/SwiftUI/Shared/MovieModel.swift b/Demo/SwiftUI/Shared/MovieModel.swift
index 061cb89e6..ca866dd5e 100644
--- a/Demo/SwiftUI/Shared/MovieModel.swift
+++ b/Demo/SwiftUI/Shared/MovieModel.swift
@@ -355,7 +355,13 @@ extension KSVideoPlayerView {
         if url.scheme == "rtmp" || url.scheme == "rtsp" {
             options.formatContextOptions["listen_timeout"] = -1
             options.formatContextOptions["fflags"] = ["nobuffer"]
-            options.preferredForwardBufferDuration = 2
+            // tcp or udp
+            options.formatContextOptions["rtsp_transport"] = "tcp"
+            options.probesize = 4096
+            options.maxAnalyzeDuration = 2_000_000
+            options.codecLowDelay = true
+            options.preferredForwardBufferDuration = 1
+            options.maxBufferDuration = 3600
             options.hardwareDecode = false
         } else {
             options.formatContextOptions["listen_timeout"] = 3
diff --git a/Sources/KSPlayer/AVPlayer/KSOptions.swift b/Sources/KSPlayer/AVPlayer/KSOptions.swift
index 85ccdd38b..c5a3d8e4b 100644
--- a/Sources/KSPlayer/AVPlayer/KSOptions.swift
+++ b/Sources/KSPlayer/AVPlayer/KSOptions.swift
@@ -43,6 +43,7 @@ open class KSOptions {
     public var probesize: Int64?
     public var maxAnalyzeDuration: Int64?
     public var lowres = UInt8(0)
+    public var codecLowDelay = false
     public var startPlayTime: TimeInterval = 0
     public var startPlayRate: Float = 1.0
     public var registerRemoteControll: Bool = true // 默认支持来自系统控制中心的控制
@@ -111,7 +112,6 @@ open class KSOptions {
         // 参数的配置可以参考protocols.texi 和 http.c
         formatContextOptions["auto_convert"] = 0
         formatContextOptions["fps_probe_size"] = 3
-//        formatContextOptions["probesize"] = 40 * 1024
 //        formatContextOptions["max_analyze_duration"] = 300 * 1000
 
         formatContextOptions["reconnect"] = 1
diff --git a/Sources/KSPlayer/MEPlayer/AVFFmpegExtension.swift b/Sources/KSPlayer/MEPlayer/AVFFmpegExtension.swift
index 1b0c8222f..f2856e1f1 100644
--- a/Sources/KSPlayer/MEPlayer/AVFFmpegExtension.swift
+++ b/Sources/KSPlayer/MEPlayer/AVFFmpegExtension.swift
@@ -93,6 +93,9 @@ extension AVCodecParameters {
         }
         codecContext.pointee.codec_id = codec.pointee.id
         codecContext.pointee.flags2 |= AV_CODEC_FLAG2_FAST
+        if options.codecLowDelay {
+            codecContext.pointee.flags |= AV_CODEC_FLAG_LOW_DELAY
+        }
         var lowres = options.lowres
         if lowres > codec.pointee.max_lowres {
             lowres = codec.pointee.max_lowres