From 9a7de740f83cfe4a4f1fcaf129be744be9680e73 Mon Sep 17 00:00:00 2001
From: cxh <zxwl@56.com>
Date: Mon, 29 Dec 2025 14:48:36 +0800
Subject: [PATCH] 1

---
 src/rtmp_manager.cpp | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/rtmp_manager.cpp b/src/rtmp_manager.cpp
index bba383b..c4e1da9 100644
--- a/src/rtmp_manager.cpp
+++ b/src/rtmp_manager.cpp
@@ -77,8 +77,10 @@ GstElement* RTMPManager::create_pipeline(const Camera& cam)
                                ",framerate=" + std::to_string(cam.fps) +
                                "/1 "
 
-                               "! queue max-size-buffers=4 max-size-time=0 leaky=downstream "
+                               // 🔻 队列深度压到 2 帧（≈ 60ms@30fps）
+                               "! queue max-size-buffers=2 max-size-time=0 leaky=downstream "
 
+                               // 🔻 编码器：baseline + CBR + 无 B 帧
                                "! mpph264enc "
                                "rc-mode=cbr "
                                "bps=" +
@@ -88,14 +90,18 @@ GstElement* RTMPManager::create_pipeline(const Camera& cam)
                                std::to_string(cam.fps) +
                                " "
                                "header-mode=each-idr "
+                               "profile=baseline "
 
+                               // SPS/PPS 每秒刷新一次（SRS/WebRTC 友好）
                                "! h264parse config-interval=1 "
 
-                               // ⭐⭐ 核心修复：时间戳整形（解决 DTS 回退 / WebRTC 抽风）
-                               "! identity sync=true single-segment=true "
+                               // 🔻 时间戳整形但不强行等待
+                               "! identity sync=false single-segment=true "
 
+                               // FLV 最小缓存模式
                                "! flvmux streamable=true "
 
+                               // sink 本身不参与同步
                                "! rtmpsink location=\"" +
                                live_rtmp +
                                "\" "