diff --git a/src/rtmp_manager.cpp b/src/rtmp_manager.cpp
index 16a4df6..06d6e30 100644
--- a/src/rtmp_manager.cpp
+++ b/src/rtmp_manager.cpp
@@ -79,31 +79,22 @@ GstElement* RTMPManager::create_pipeline(const Camera& cam)
 
     std::string pipeline_str = "v4l2src device=" + cam.device +
                                " io-mode=dmabuf "
-                               "! video/x-raw,format=NV12,"
-                               "width=" +
+                               "! video/x-raw,format=NV12,width=" +
                                std::to_string(width) + ",height=" + std::to_string(height) +
                                ",framerate=" + std::to_string(fps) +
                                "/1 "
-                               "! queue max-size-buffers=4 leaky=downstream "
-
+                               "! queue max-size-buffers=2 leaky=downstream "
                                "! mpph264enc "
-                               "profile=baseline "  // ⭐ 核心：硬性禁 B 帧
-                               "rc-mode=cbr "
                                "bps=" +
                                std::to_string(bitrate) +
                                " "
                                "gop=" +
                                std::to_string(fps) +
-                               " "                      // 1 秒 1 个 IDR
-                               "header-mode=each-idr "  // SPS/PPS 跟 IDR
-
+                               " "
+                               "rc-mode=cbr "
+                               "header-mode=each-idr "
                                "! h264parse "
-                               "config-interval=1 "
-                               "disable-passthrough=true "  // ⭐ 修 DTS
-
-                               "! queue max-size-buffers=5 leaky=downstream "
                                "! flvmux streamable=true "
-
                                "! rtmpsink location=\"" +
                                live_rtmp + "\" sync=false async=false";