Nvmultiurisrcbin

.vscode/settings.json

@@ -75,6 +75,9 @@
     "charconv": "cpp",
     "complex": "cpp",
     "typeindex": "cpp",
-    "variant": "cpp"
+    "variant": "cpp",
+    "shared_mutex": "cpp",
+    "cfenv": "cpp",
+    "stream_ref": "cpp"
   }
 }

data/configuration.json

@@ -27,5 +27,31 @@
     "FACE_NET_WIDTH": 160,
     "FACE_NET_HEIGHT": 160,
     "ll-config-file": "../data/tracker_configs/config_tracker_NvDCF_perf.yml",
-    "ll-lib-file": "../data/tracker_configs/libnvds_nvmultiobjecttracker.so"
+    "ll-lib-file": "../data/tracker_configs/libnvds_nvmultiobjecttracker.so",
+    "dynamic_add_remove": true,
+    "nvmultiurisrc": {
+        "uri-list": "",
+        "max-batch-size": 20,
+        "live-source": 1,
+        "batched-push-timeout": 33333,
+        "rtsp-reconnect-interval": 1,
+        "rtsp-reconnect-attempts": 10,
+        "drop-pipeline-eos": true,
+        "drop-frame-interval": 5,
+        "file-loop": false,
+        "width": 1920,
+        "height": 1080,
+        "cudadec-memtype": 0,
+        "latency": 200,
+        "sensor-id-list": "",
+        "sensor-name-list": "",
+        "buffer-pool-size": 16,
+        "ip-address": "localhost",
+        "port": "9456",
+        "disable-audio": true,
+        "config-file-path": "",
+        "max-latency": 1000000,
+        "num-extra-surfaces": 1,
+        "num-surfaces-per-frame": 0
+    }
 }

src/pipeline_manager.cpp

@@ -27,6 +27,9 @@ PipelineManager::PipelineManager(int num_sources, char** url_camera)
     gst_init(&num_sources, &url_camera);
     g_run_forever = atoi("0");
     loop = g_main_loop_new(NULL, FALSE);
+    const auto& config = ConfigManager::get_instance().get_config();
+
+    dynamic_add_remove = config["dynamic_add_remove"];
 }
 
 int PipelineManager::create_pipeline() {
@@ -204,6 +207,16 @@ bool PipelineManager::playing_pipeline(int num_sources, char** url_camera) {
         gst_object_unref(pipeline);
         return false;
     }
+
+    // Wait for state change to complete
+    // GstState state;
+    // GstState pending;
+    // GstStateChangeReturn state_ret = gst_element_get_state(pipeline, &state,
+    // &pending, 5 * GST_SECOND); if (state_ret == GST_STATE_CHANGE_SUCCESS) {
+    //     g_print("***************Pipeline is in PLAYING state\n");
+    // } else {
+    //     g_printerr("***************Failed to change pipeline state\n");
+    // }
     return true;
 }
 
@@ -229,59 +242,119 @@ bool PipelineManager::setup_pipeline() {
     // this is the running branch of the if statement for none-jetson platforms
     // (without a transform_jetson plugin before the sink plugin) custom_plugin
     // is dsexample pluging
-    if (sink_manager->display_output < 3) {
-        gst_bin_add_many(GST_BIN(pipeline),
-                         nv_infer_server_manager->primary_detector,
-                         nv_tracker_manager->tracker,
-                         face_nv_infer_server_manager->face_detector,
-                         // gstds_example_manager->custom_plugin,
-                         tiler_manager->tiler, queue_array[2].queue,
-                         nv_video_convert_manager->nvvidconv,
-                         nv_osd_manager->nvosd, sink_manager->sink, NULL);
+    if (dynamic_add_remove == false) {
+        if (sink_manager->display_output < 3) {
+            gst_bin_add_many(GST_BIN(pipeline),
+                             nv_infer_server_manager->primary_detector,
+                             nv_tracker_manager->tracker,
+                             face_nv_infer_server_manager->face_detector,
+                             // gstds_example_manager->custom_plugin,
+                             tiler_manager->tiler, queue_array[2].queue,
+                             nv_video_convert_manager->nvvidconv,
+                             nv_osd_manager->nvosd, sink_manager->sink, NULL);
 
-        /* we link the elements together
-         * nvstreammux -> nvinfer -> nvtiler -> nvvidconv -> nvosd ->
-         * video-renderer */
-        if (!gst_element_link_many(streammux_manager->streammux,
-                                   nv_video_convert_manager->nvvidconv,
-                                   nv_infer_server_manager->primary_detector,
-                                   nv_tracker_manager->tracker,
-                                   face_nv_infer_server_manager->face_detector,
-                                   //    gstds_example_manager->custom_plugin,
-                                   tiler_manager->tiler, nv_osd_manager->nvosd,
-                                   sink_manager->sink, NULL)) {
-            g_printerr("Elements could not be linked.\n");
-            return false;
+            /* we link the elements together
+             * nvstreammux -> nvinfer -> nvtiler -> nvvidconv -> nvosd ->
+             * video-renderer */
+            if (!gst_element_link_many(
+                    streammux_manager->streammux,
+                    nv_video_convert_manager->nvvidconv,
+                    nv_infer_server_manager->primary_detector,
+                    nv_tracker_manager->tracker,
+                    face_nv_infer_server_manager->face_detector,
+                    //    gstds_example_manager->custom_plugin,
+                    tiler_manager->tiler, nv_osd_manager->nvosd,
+                    sink_manager->sink, NULL)) {
+                g_printerr("Elements could not be linked.\n");
+                return false;
+            }
+        } else {
+            gst_bin_add_many(
+                GST_BIN(pipeline), nv_infer_server_manager->primary_detector,
+                nv_tracker_manager->tracker,
+                face_nv_infer_server_manager->face_detector,
+                // gstds_example_manager->custom_plugin,
+                tiler_manager->tiler, queue_array[2].queue,
+                nv_video_convert_manager->nvvidconv, nv_osd_manager->nvosd,
+                sink_manager->nvvidconv_postosd, sink_manager->caps,
+                sink_manager->encoder, sink_manager->rtppay, sink_manager->sink,
+                NULL);
+
+            //            Link the elements together:
+            //            file-source -> h264-parser -> nvh264-decoder ->
+            //            nvinfer -> nvvidconv -> nvosd -> nvvidconv_postosd ->
+            //            caps -> encoder -> rtppay -> udpsink
+            if (!gst_element_link_many(
+                    streammux_manager->streammux,
+                    nv_video_convert_manager->nvvidconv,
+                    nv_infer_server_manager->primary_detector,
+                    nv_tracker_manager->tracker,
+                    face_nv_infer_server_manager->face_detector,
+                    // gstds_example_manager->custom_plugin,
+                    tiler_manager->tiler, nv_osd_manager->nvosd,
+                    sink_manager->nvvidconv_postosd, sink_manager->caps,
+                    sink_manager->encoder, sink_manager->rtppay,
+                    sink_manager->sink, NULL)) {
+                g_printerr("Elements could not be linked.\n");
+                return false;
+            }
         }
     } else {
-        gst_bin_add_many(GST_BIN(pipeline),
-                         nv_infer_server_manager->primary_detector,
-                         nv_tracker_manager->tracker,
-                         face_nv_infer_server_manager->face_detector,
-                         // gstds_example_manager->custom_plugin,
-                         tiler_manager->tiler, queue_array[2].queue,
-                         nv_video_convert_manager->nvvidconv,
-                         nv_osd_manager->nvosd, sink_manager->nvvidconv_postosd,
-                         sink_manager->caps, sink_manager->encoder,
-                         sink_manager->rtppay, sink_manager->sink, NULL);
+        if (sink_manager->display_output < 3) {
+            gst_bin_add_many(GST_BIN(pipeline),
+                             nv_infer_server_manager->primary_detector,
+                             nv_tracker_manager->tracker,
+                             face_nv_infer_server_manager->face_detector,
+                             // gstds_example_manager->custom_plugin,
+                             tiler_manager->tiler, queue_array[2].queue,
+                             nv_video_convert_manager->nvvidconv,
+                             nv_osd_manager->nvosd, sink_manager->sink, NULL);
 
-        //            Link the elements together:
-        //            file-source -> h264-parser -> nvh264-decoder ->
-        //            nvinfer -> nvvidconv -> nvosd -> nvvidconv_postosd ->
-        //            caps -> encoder -> rtppay -> udpsink
-        if (!gst_element_link_many(streammux_manager->streammux,
-                                   nv_video_convert_manager->nvvidconv,
-                                   nv_infer_server_manager->primary_detector,
-                                   nv_tracker_manager->tracker,
-                                   face_nv_infer_server_manager->face_detector,
-                                   // gstds_example_manager->custom_plugin,
-                                   tiler_manager->tiler, nv_osd_manager->nvosd,
-                                   sink_manager->nvvidconv_postosd,
-                                   sink_manager->caps, sink_manager->encoder,
-                                   sink_manager->rtppay, sink_manager->sink,
-                                   NULL)) {
-            g_printerr("Elements could not be linked.\n");
-            return false;
+            /* we link the elements together
+             * nvstreammux -> nvinfer -> nvtiler -> nvvidconv -> nvosd ->
+             * video-renderer */
+            if (!gst_element_link_many(  // streammux_manager->streammux,
+                    SourceBin::nvmultiurisrcbin,
+                    // nv_video_convert_manager->nvvidconv,
+                    nv_infer_server_manager->primary_detector,
+                    nv_tracker_manager->tracker,
+                    face_nv_infer_server_manager->face_detector,
+                    //    gstds_example_manager->custom_plugin,
+                    tiler_manager->tiler, nv_osd_manager->nvosd,
+                    sink_manager->sink, NULL)) {
+                g_printerr("Elements could not be linked.\n");
+                return false;
+            }
+        } else {
+            gst_bin_add_many(
+                GST_BIN(pipeline), nv_infer_server_manager->primary_detector,
+                nv_tracker_manager->tracker,
+                face_nv_infer_server_manager->face_detector,
+                // gstds_example_manager->custom_plugin,
+                tiler_manager->tiler, queue_array[2].queue,
+                nv_video_convert_manager->nvvidconv, nv_osd_manager->nvosd,
+                sink_manager->nvvidconv_postosd, sink_manager->caps,
+                sink_manager->encoder, sink_manager->rtppay, sink_manager->sink,
+                NULL);
+
+            //            Link the elements together:
+            //            file-source -> h264-parser -> nvh264-decoder ->
+            //            nvinfer -> nvvidconv -> nvosd -> nvvidconv_postosd ->
+            //            caps -> encoder -> rtppay -> udpsink
+            if (!gst_element_link_many(  // streammux_manager->streammux,
+                    SourceBin::nvmultiurisrcbin,
+                    // nv_video_convert_manager->nvvidconv,
+                    nv_infer_server_manager->primary_detector,
+                    nv_tracker_manager->tracker,
+                    face_nv_infer_server_manager->face_detector,
+                    // gstds_example_manager->custom_plugin,
+                    tiler_manager->tiler, nv_osd_manager->nvosd,
+                    sink_manager->nvvidconv_postosd, sink_manager->caps,
+                    sink_manager->encoder, sink_manager->rtppay,
+                    sink_manager->sink, NULL)) {
+                g_printerr("Elements could not be linked.\n");
+                return false;
+            }
         }
     }
     return true;
@@ -316,24 +389,39 @@ bool PipelineManager::create_pipeline_elements(int num_sources,
                                                char** url_camera) {
     streammux_manager->create_streammux(num_sources);
     set_cuda_device();
-    gst_bin_add(GST_BIN(pipeline), streammux_manager->streammux);
-    // for each source generate a pad for the source, generate another pad for
-    // streammux, then connect the source pad to the pad of streammux
+    if (dynamic_add_remove == false) {
+        gst_bin_add(GST_BIN(pipeline), streammux_manager->streammux);
+        // for each source generate a pad for the source, generate another pad
+        // for streammux, then connect the source pad to the pad of streammux
 
-    for (guint i = 0; i < (guint)num_sources; i++) {
-        GstElement* source_bin;
-        //        GstElement *source_bin = create_uridecode_bin (i,
-        //        const_cast<char*>(first_video.c_str()));
-        g_print("Trying to create uridecode_bin for %s  \n", url_camera[i + 1]);
+        for (guint i = 0; i < (guint)num_sources; i++) {
+            GstElement* source_bin;
+            //        GstElement *source_bin = create_uridecode_bin (i,
+            //        const_cast<char*>(first_video.c_str()));
+            g_print("Trying to create uridecode_bin for %s  \n",
+                    url_camera[i + 1]);
 
-        source_bin = SourceBin::create_uridecode_bin(
-            i, url_camera[i + 1], streammux_manager->streammux, prop);
-        if (!source_bin) {
-            g_printerr("Failed to create source bin for %s. Exiting.\n",
-                       url_camera[i + 1]);
-            return false;
+            source_bin = SourceBin::create_uridecode_bin(
+                i, url_camera[i + 1], streammux_manager->streammux, prop);
+            if (!source_bin) {
+                g_printerr("Failed to create source bin for %s. Exiting.\n",
+                           url_camera[i + 1]);
+                return false;
+            }
+            // g_source_bin_list[i] = source_bin;
+            gst_bin_add(GST_BIN(pipeline), source_bin);
         }
-        // g_source_bin_list[i] = source_bin;
+    } else {
+        std::ostringstream oss;
+        for (uint i = 0; i < (guint)num_sources; ++i) {
+            if (i) {
+                oss << ",";
+            }
+            oss << url_camera[i + 1];
+        }
+        std::string uri_list = oss.str();
+        GstElement* source_bin;
+        source_bin = SourceBin::create_nv_multi_urisrc_bin(uri_list);
         gst_bin_add(GST_BIN(pipeline), source_bin);
     }
 

src/pipeline_manager.hpp

@@ -55,6 +55,7 @@ class PipelineManager {
    public:
     int current_device = -1;
     struct cudaDeviceProp prop;
+    bool dynamic_add_remove;
 
     QueueManager queue_array[5];
     PipelineManager();

src/source_bin.cpp

@@ -1,7 +1,87 @@
 #include "source_bin.hpp"
 
 // Initialize static member (required for non-const static members)
-// int MyClass::staticCounter = 0;
+// the linker needs real storage for them.
+
+// string statics
+std::string SourceBin::ip_address;
+std::string SourceBin::port;
+std::string SourceBin::uri_list;
+std::string SourceBin::sensor_id_list;
+std::string SourceBin::sensor_name_list;
+std::string SourceBin::config_file_path;
+
+// int statics
+int SourceBin::max_batch_size = 0;
+int SourceBin::batched_push_timeout = 0;
+int SourceBin::rtsp_reconnect_interval = 0;
+int SourceBin::rtsp_reconnect_attempts = 0;
+int SourceBin::drop_frame_interval = 0;
+int SourceBin::width = 0;
+int SourceBin::height = 0;
+int SourceBin::latency = 0;
+int SourceBin::cudadec_memtype = 0;
+int SourceBin::buffer_pool_size = 0;
+int SourceBin::max_latency = 0;
+int SourceBin::num_extra_surfaces = 0;
+int SourceBin::num_surfaces_per_frame = 0;
+int SourceBin::live_source = 0;
+
+// bool statics
+bool SourceBin::drop_pipeline_eos = false;
+bool SourceBin::file_loop = false;
+bool SourceBin::disable_audio = false;
+
+GstElement *SourceBin::nvmultiurisrcbin = NULL;
+
+void SourceBin::configs() {
+    const auto &config = ConfigManager::get_instance().get_config();
+    // MUXER_OUTPUT_HEIGHT = config["MUXER_OUTPUT_HEIGHT"];
+    // MUXER_OUTPUT_WIDTH = config["MUXER_OUTPUT_WIDTH"];
+    // config.at("nvmultiurisrc").at("max-batch-size").get_to(max_batch_size);
+    // auto eos = get_nested_value<bool>(config, {"nvmultiurisrc",
+    // "drop-pipeline-eos"});
+
+    max_batch_size = config.at("nvmultiurisrc").at("max-batch-size").get<int>();
+    live_source = config.at("nvmultiurisrc").at("live-source").get<int>();
+    batched_push_timeout =
+        config.at("nvmultiurisrc").at("batched-push-timeout").get<int>();
+    rtsp_reconnect_interval =
+        config.at("nvmultiurisrc").at("rtsp-reconnect-interval").get<int>();
+    rtsp_reconnect_attempts =
+        config.at("nvmultiurisrc").at("rtsp-reconnect-attempts").get<int>();
+    drop_frame_interval =
+        config.at("nvmultiurisrc").at("drop-frame-interval").get<int>();
+    width = config.at("nvmultiurisrc").at("width").get<int>();
+    height = config.at("nvmultiurisrc").at("height").get<int>();
+    latency = config.at("nvmultiurisrc").at("latency").get<int>();
+    cudadec_memtype =
+        config.at("nvmultiurisrc").at("cudadec-memtype").get<int>();
+    buffer_pool_size =
+        config.at("nvmultiurisrc").at("buffer-pool-size").get<int>();
+    drop_pipeline_eos =
+        config.at("nvmultiurisrc").at("drop-pipeline-eos").get<bool>();
+    file_loop = config.at("nvmultiurisrc").at("file-loop").get<bool>();
+    disable_audio = config.at("nvmultiurisrc").at("disable-audio").get<bool>();
+    ip_address = config.at("nvmultiurisrc").at("ip-address").get<std::string>();
+    port = config.at("nvmultiurisrc").at("port").get<std::string>();
+    uri_list = config.at("nvmultiurisrc").at("uri-list").get<std::string>();
+    sensor_id_list =
+        config.at("nvmultiurisrc").at("sensor-id-list").get<std::string>();
+    sensor_name_list =
+        config.at("nvmultiurisrc").at("sensor-name-list").get<std::string>();
+    config_file_path =
+        config.at("nvmultiurisrc").at("config-file-path").get<std::string>();
+    // ****************************config_files*****************************
+    // /opt/nvidia/deepstream/deepstream/service-maker/sources/apps/cpp/deepstream_test5_app/test5_b16_dynamic_source.yaml
+    // ****************************source_config_files*****************************
+    // /opt/nvidia/deepstream/deepstream/service-maker/sources/apps/cpp/deepstream_test5_app/source_list_dynamic.yaml
+    max_latency = config.at("nvmultiurisrc").at("max-latency").get<int>();
+    num_extra_surfaces =
+        config.at("nvmultiurisrc").at("num-extra-surfaces").get<int>();
+    num_surfaces_per_frame =
+        config.at("nvmultiurisrc").at("num-surfaces-per-frame").get<int>();
+}
 
 // Definition of static function
 void SourceBin::decodebin_child_added(GstChildProxy *child_proxy,
@@ -109,4 +189,189 @@ GstElement *SourceBin::create_uridecode_bin(guint index, gchar *filename,
     // g_source_enabled[index] = TRUE;
 
     return decodebin;
+}
+
+// static void check_versions() {
+//     guint major, minor, micro, nano;
+//     gst_version(&major, &minor, &micro, &nano);
+//     g_print("GStreamer version: %u.%u.%u.%u\n", major, minor, micro, nano);
+
+//     // Check if nvmultiurisrcbin is available
+//     GstElementFactory *factory =
+//     gst_element_factory_find("nvmultiurisrcbin"); if (factory) {
+//         // Get the plugin name from the factory
+//         const gchar *plugin_name =
+//         gst_plugin_feature_get_plugin_name(GST_PLUGIN_FEATURE(factory));
+
+//         // Find the plugin in the registry
+//         GstRegistry *registry = gst_registry_get();
+//         GstPlugin *plugin = gst_registry_find_plugin(registry, plugin_name);
+
+//         if (plugin) {
+//             const gchar *version = gst_plugin_get_version(plugin);
+//             g_print("nvmultiurisrcbin plugin: %s, version: %s\n",
+//             plugin_name, version); gst_object_unref(plugin);
+//         } else {
+//             g_print("nvmultiurisrcbin found (plugin: %s), but couldn't get
+//             version\n", plugin_name);
+//         }
+//         gst_object_unref(factory);
+//     } else {
+//         g_print("nvmultiurisrcbin not found\n");
+//     }
+// }
+
+// static void check_versions() {
+//     guint major, minor, micro, nano;
+//     gst_version(&major, &minor, &micro, &nano);
+//     g_print("GStreamer version: %u.%u.%u.%u\n", major, minor, micro, nano);
+
+//     // Check nvmultiurisrcbin version
+//     GstPluginFeature *feature = gst_registry_find_feature(
+//         gst_registry_get(), "nvmultiurisrcbin", GST_TYPE_ELEMENT_FACTORY);
+//     if (feature) {
+//         const gchar *plugin_name =
+//         gst_plugin_feature_get_plugin_name(feature); GstPlugin *plugin =
+//         gst_registry_find_plugin(gst_registry_get(), plugin_name); if
+//         (plugin) {
+//             const gchar *version = gst_plugin_get_version(plugin);
+//             g_print("nvmultiurisrcbin plugin version: %s\n", version);
+//             gst_object_unref(plugin);
+//         }
+//         gst_object_unref(feature);
+//     }
+// }
+
+GstElement *SourceBin::create_nv_multi_urisrc_bin(std::string filenames) {
+    configs();
+    g_print("Creating nvmultiurisrcbin for stream %s \n", filenames.c_str());
+    // g_source_id_list[index] = index;
+    gchar nvmultiurisrcbin_name[32] = {};
+    // the buffer can hold 31 characters + 1 null terminator.
+    // In g_snprintf() the second argument is the maximum number of characters
+    // (including the '\0') that can be written into the buffer.
+    g_snprintf(nvmultiurisrcbin_name, sizeof(nvmultiurisrcbin_name),
+               "nvmultiurisrc-bin-%02d", 0);
+    nvmultiurisrcbin =
+        gst_element_factory_make("nvmultiurisrcbin", nvmultiurisrcbin_name);
+    if (!nvmultiurisrcbin) {
+        std::cerr << "Failed to create nvmultiurisrcbin" << std::endl;
+        return NULL;
+    }
+    // // Try setting a config file that enables REST API
+    // // g_object_set(G_OBJECT(nvmultiurisrcbin), "config-file-path",
+    // "/etc/deepstream/rest_api.conf", NULL);
+    // g_object_set(G_OBJECT(nvmultiurisrcbin), "uri-list",
+    // ""/*filenames.c_str()*/, NULL); g_object_set(G_OBJECT(nvmultiurisrcbin),
+    // "max-batch-size", 20/*(gint)filenames.size()*/, NULL);
+    // g_object_set(G_OBJECT(nvmultiurisrcbin), "live-source", 1, NULL); //1 for
+    // RTSP/camera, 0 for file g_object_set(G_OBJECT(nvmultiurisrcbin),
+    // "batched-push-timeout", 33333, NULL); //1 for RTSP/camera, 0 for file
+    // g_object_set(G_OBJECT(nvmultiurisrcbin), "rtsp-reconnect-interval", 1,
+    // NULL);
+    // // g_object_set(G_OBJECT(nvmultiurisrcbin), "rtsp-reconnect-attempts",
+    // 10, NULL); g_object_set(G_OBJECT(nvmultiurisrcbin), "drop-pipeline-eos",
+    // TRUE, NULL); g_object_set(G_OBJECT(nvmultiurisrcbin),
+    // "drop-frame-interval", 5, NULL); //Skip frames if decoding lags behind.
+    // g_object_set(G_OBJECT(nvmultiurisrcbin), "cudadec-memtype", 0, NULL); //
+    // Memory type for CUDA decoding (0=default, 1=NVBUF_MEM_CUDA_PINNED,
+    // 2=NVBUF_MEM_CUDA_DEVICE, 3=NVBUF_MEM_CUDA_UNIFIED).
+    // g_object_set(G_OBJECT(nvmultiurisrcbin), "latency", 200, NULL); //Network
+    // jitter buffer latency (milliseconds). Used for RTSP.
+    // g_object_set(G_OBJECT(nvmultiurisrcbin), "sensor-id-list",
+    // ""/*"UniqueSensorId1"*/, NULL); g_object_set(G_OBJECT(nvmultiurisrcbin),
+    // "sensor-name-list", ""/*"UniqueSensorName1"*/, NULL);
+
+    // The property **`buffer-pool-size`** of `nvmultiurisrcbin` is **the number
+    // of decoded frame buffers allocated per source stream** in the internal
+    // buffer pool.
+    // ### 🔎 Details
+    // * Each URI (RTSP/file) source inside `nvmultiurisrcbin` uses NVIDIA’s
+    // decoder (`nvdec` / `nvv4l2decoder`).
+    // * The decoder requires a pool of surfaces (video frame buffers in GPU/CPU
+    // memory) that it cycles through while decoding.
+    // * `buffer-pool-size` defines **how many such surfaces per stream** are
+    // preallocated and kept ready.
+
+    // ### ⚖️ Trade-offs
+
+    // * **Small pool size**
+
+    // * Saves GPU/CPU memory.
+    // * But if your pipeline lags, or downstream elements (like inference or
+    // tiler) are slower, the decoder may run out of free buffers → frame drops
+    // or stuttering.
+
+    // * **Large pool size**
+
+    // * Reduces risk of frame drops during spikes in processing latency.
+    // * Increases GPU memory usage (each 1080p NV12 buffer is \~6 MB, so with
+    // 16 buffers → \~96 MB per stream).
+
+    // ### 📌 Default
+
+    // * If you don’t set it, the plugin picks an internal default (usually
+    // `8`).
+    // * Many NVIDIA sample configs set `16` for stable real-time decoding.
+    // means each camera/file gets 16 GPU decode buffers reserved.
+
+    // ### ✅ When to tune
+
+    // * If you have **high-resolution streams (4K, 8K)** or **many concurrent
+    // sources**, and see frame drops → increase `buffer-pool-size` (e.g., `24`
+    // or `32`).
+    // * If you are memory-constrained (e.g., Jetson devices), you can lower it
+    // (but risk frame loss).
+
+    // gchar *file_uri = g_strdup("file:///root/Put.mp4"); //=
+    // g_strdup_printf("file://%s", filename);
+    // g_object_set(G_OBJECT(nvmultiurisrcbin),
+    //             "uri-list", "",
+    //             "max-batch-size",20,
+    //             "sensor-id-list","",
+    //             "width", 1920,
+    //             "height", 1080,
+    //             // "gpu-id", GPU_ID,
+    //             "sensor-name-list", "",
+    //             "ip-address", "localhost",
+    //             "port", "9456",
+    //             "batched-push-timeout", 33000,
+    //             NULL);
+    // g_free(file_uri);
+
+    g_object_set(G_OBJECT(nvmultiurisrcbin), "port", port.c_str(), nullptr);
+    g_object_set(G_OBJECT(nvmultiurisrcbin), "ip-address", ip_address.c_str(),
+                 nullptr);
+    g_object_set(G_OBJECT(nvmultiurisrcbin), "batched-push-timeout",
+                 batched_push_timeout, nullptr);
+    g_object_set(G_OBJECT(nvmultiurisrcbin), "max-batch-size", max_batch_size,
+                 nullptr);
+    g_object_set(G_OBJECT(nvmultiurisrcbin), "drop-pipeline-eos",
+                 drop_pipeline_eos, nullptr);
+    g_object_set(G_OBJECT(nvmultiurisrcbin), "rtsp-reconnect-interval",
+                 rtsp_reconnect_interval, nullptr);
+    g_object_set(G_OBJECT(nvmultiurisrcbin), "live-source", live_source,
+                 nullptr);
+    g_object_set(G_OBJECT(nvmultiurisrcbin), "width", width, nullptr);
+    g_object_set(G_OBJECT(nvmultiurisrcbin), "height", height, nullptr);
+
+    if (!nvmultiurisrcbin) {
+        std::cerr << "Failed to create nvmultiurisrcbin" << std::endl;
+        return NULL;
+    }
+
+    // // Set to READY state first to initialize REST server
+    // gst_element_set_state(nvmultiurisrcbin, GST_STATE_READY);
+
+    // // Wait a bit for initialization
+    // GstState state, pending;
+    // gst_element_get_state(nvmultiurisrcbin, &state, &pending, 2 *
+    // GST_SECOND);
+
+    // // Then set to PLAYING
+    // gst_element_set_state(nvmultiurisrcbin, GST_STATE_PLAYING);
+    // gst_element_get_state(nvmultiurisrcbin, &state, &pending, 2 *
+    // GST_SECOND);
+
+    return nvmultiurisrcbin;
 }

src/source_bin.hpp

@@ -6,7 +6,10 @@
 #include <fstream>
 #include <iostream>
 
+#include "config_manager.hpp"
 #include "cuda_runtime_api.h"
+#include "source_config.hpp"
+
 #define GPU_ID 0
 
 class SourceBin {
@@ -17,14 +20,25 @@ class SourceBin {
         struct cudaDeviceProp prop;
     } StreamData;
 
+    static GstElement *nvmultiurisrcbin;
     // Static function declaration
     static void decodebin_child_added(GstChildProxy *, GObject *, gchar *,
                                       gpointer);
     static void cb_newpad(GstElement *, GstPad *, gpointer, gboolean *);
     static GstElement *create_uridecode_bin(guint, gchar *, GstElement *,
                                             cudaDeviceProp prop);
+    static GstElement *create_nv_multi_urisrc_bin(std::string);
 
    private:
+    static void configs();
+
+    static int max_batch_size, live_source, batched_push_timeout,
+        rtsp_reconnect_interval, rtsp_reconnect_attempts, drop_frame_interval,
+        width, height, latency, cudadec_memtype, buffer_pool_size, max_latency,
+        num_extra_surfaces, num_surfaces_per_frame;
+    static bool drop_pipeline_eos, file_loop, disable_audio;
+    static std::string ip_address, port, uri_list, sensor_id_list,
+        sensor_name_list, config_file_path;
     // Static data member (if needed)
     // static int staticCounter;
 };