1

src/rtsp_manager.cpp

@@ -32,29 +32,31 @@ GstRTSPMediaFactory *RTSPManager::create_media_factory(const Camera &cam)
 
     std::string launch_str =
         "( v4l2src device=" + cam.device +
-        " ! video/x-raw,format=NV12,width=" + std::to_string(out_width) +
+        " io-mode=4 is-live=true "
+        " ! video/x-raw,format=NV12,width=" +
+        std::to_string(out_width) +
         ",height=" + std::to_string(out_height) +
         ",framerate=" + std::to_string(cam.fps) + "/1"
-                                                  " ! queue max-size-time=100000000"
-                                                  " ! videoconvert"
+                                                  " ! queue max-size-buffers=1 leaky=downstream"
                                                   " ! mpph264enc rc-mode=cbr bps=" +
         std::to_string(cam.bitrate) +
         " gop=" + std::to_string(cam.fps) +
-        " profile=high"
-        " ! h264parse"
-        " ! rtph264pay name=pay0 pt=96 )";
+        " b-frames=0"
+        " ! h264parse config-interval=1"
+        " ! rtph264pay name=pay0 pt=96 config-interval=1 )";
 
     GstRTSPMediaFactory *factory = gst_rtsp_media_factory_new();
     gst_rtsp_media_factory_set_launch(factory, launch_str.c_str());
 
+    // ★ 非共享会导致重复 mount 失败，让它共享
     gst_rtsp_media_factory_set_shared(factory, TRUE);
+
+    // ★ live source 必须用 RESET，不然 UNPREPARE 不会释放 pipeline
     gst_rtsp_media_factory_set_suspend_mode(factory, GST_RTSP_SUSPEND_MODE_RESET);
 
-    gst_rtsp_media_factory_set_latency(factory, 0);
-    gst_rtsp_media_factory_set_transport_mode(factory, GST_RTSP_TRANSPORT_MODE_PLAY);
-
-    // 监听 pipeline 创建
-    g_signal_connect_data(factory, "media-configure", G_CALLBACK(on_media_created),
+    // 绑定创建回调
+    g_signal_connect_data(factory, "media-configure",
+                          G_CALLBACK(on_media_created),
                           g_strdup(cam.name.c_str()),
                           (GClosureNotify)g_free,
                           (GConnectFlags)0);