Hi,gstreamers.
      I want to use the rtspclientsink plugin in my program. It succeeded via gst-launch-1.0 when using rtspclientsink,but failed in my program. My program is compiled successfully and no running time errors,but my pipeline was blocked,so the data was not sent into network via rtspclientsink. 
      Can you find some problems in my program? Should I config something like the following when using rtspclientsink:
      server = gst_rtsp_server_new ();   mounts = gst_rtsp_server_get_mount_points (server);  ???
      My key part of the program is showing in the following and I hope some of you can help me find the problem:
//////////////////////////////////////////////    
    app1-> videosrc = gst_element_factory_make ("appsrc", "videosrc1");
    if( !app1->videosrc ) {
                g_print( "Failed to create element appsrc1!\n");       
    }
        else{
                g_print("Succeed to create element appsrc1!\n");
        }

        app1->videoparse = gst_element_factory_make("videoparse","videoparse1");
        if (!app1->videoparse){
                g_print("Failed to create element videoparse1!\n");
        }
        else{
                g_print("Succeed to create element videoparse1!\n");
        }

        app1->capsfilter1 = gst_element_factory_make("capsfilter","capsfilter11");
        if (!app1->capsfilter1){
                g_print("Failed to create element capsfilter11!\n");
        }
        else{
                g_print("Succeed to create element capsfilter11!\n");
        }

        app1->capsfilter2 = gst_element_factory_make("capsfilter","capsfilter21");
        if (!app1->capsfilter2){
                g_print("Failed to create element capsfilter21!\n");
        }
        else{
                g_print("Succeed to create element capsfilter21!\n");
        }

        app1->omxh265enc = gst_element_factory_make("omxh265enc","omxh265enc1");
        if (!app1->omxh265enc){
                g_print("Failed to create element omxh265enc1!\n");
        }
        else{
                g_print("Succeed to create element omxh265enc!\n");
        }

        app1->rtspclientsink = gst_element_factory_make("rtspclientsink","rtspclientsink1");
        if (!app1->rtspclientsink){
                g_print("Failed to create element rtspclientsink!\n");
        }
        else{
                g_print("Succeed to create element rtspclientsink!\n");
        }

        sprintf(rtsp_str,"rtsp://216.1.1.80/81_%d",sessionNum);

        g_object_set(G_OBJECT(app1->rtspclientsink),
                                "location",rtsp_str,
                                "protocols",GST_RTSP_LOWER_TRANS_TCP,
                                NULL);  

        g_object_set(G_OBJECT(app1->videoparse),"format","I420","width",4096,"height",2168,"framerate",5,1,NULL);  

        caps1 = gst_caps_new_simple("video/x-h265",
                "stream-format",G_TYPE_STRING,"byte-stream",        
                NULL);
        g_object_set(G_OBJECT(app1->capsfilter2),"caps",caps1,NULL);       //还有一种创建cap的方式如下：

        caps2 = gst_caps_new_simple("video/x-raw",
                "format",G_TYPE_STRING,"I420",
                "width",G_TYPE_INT,4096,
                "height",G_TYPE_INT,2168,
                "framerate",GST_TYPE_FRACTION,24,1,
                "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1,
        NULL);
        gst_app_src_set_caps(GST_APP_SRC( app1->videosrc), caps2);

        g_object_set(G_OBJECT(app1->videosrc),
                                "stream-type", 0,
                                "is-live", TRUE,
                                "format", GST_FORMAT_TIME, 
                                "max-bytes",FRAME_W * FRAME_H * 3/2 * 100,
                                NULL);

        gst_bin_add_many(videoBin,app1->videosrc,app1->videoparse,app1->omxh265enc,app1->capsfilter2,app1->rtspclientsink,NULL);

        bool ok=false;
        ok = gst_element_link_many(app1->videosrc,app1->videoparse,app1->omxh265enc,app1->capsfilter2,app1->rtspclientsink,NULL);
        if (ok) g_print("Linked most of the elements together!\n");
        else    g_print("*** Linking error! ***\n");

        g_object_set(G_OBJECT(app1->videosrc),
                                "stream-type", 0,
                                "is-live", TRUE,
                                "format", GST_FORMAT_TIME, 
                                "do-timestamp", TRUE,
                                "min-latency", 0,
                                "max-bytes", FRAME_W * FRAME_H * 3/2 * 100,
                                "block", TRUE,
                                "min-percent", 50,
                                NULL);
///////////////////////////////////////////////
      It's urgent! Thank you very much!

        
        
        
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