<html> <head> <style> .hmmessage P { margin:0px; padding:0px } body.hmmessage { font-size: 10pt; font-family:Verdana } </style> </head> <body class='hmmessage'> Hi all, I had a command line code to record video from network and it was working fine (it is listed below): gst-launch udpsrc port=5000 caps="application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)H263-1998" num-buffers=5000 ! queue ! rtph263pdepay ! 'video/x-h263,width=320,height=240,framerate=(fraction)25/1' ! queue ! avimux ! queue ! filesink location=test1.avi So, I wanted to change this into a code so that I wanted to include it in my application and I failed. Please help me. I got an error on the gst_bin_add_many and gst_element_link_many functions. The code is presented below. Please help me. The error is the following: (videorecorder:19632): GStreamer-CRITICAL **: gst_bin_add: assertion `GST_IS_ELEMENT (element)' failed (videorecorder:19632): GStreamer-CRITICAL **: gst_element_link_pads_filtered: assertion `GST_IS_ELEMENT (dest)' failed Thank you. - Zelalem S. #include <gst/gst.h> #include <stdio.h> int main (int   argc,       char *argv[]) {   GstElement *udpsource, *queue1, *queue2, *queue3, *h263depay, *avimuxer, *filedes, *pipeline;   GstCaps *caps, *caps2;   /* init GStreamer */   gst_init (&argc, &argv);   /* create element */   udpsource = gst_element_factory_make ("udpsrc", "udpsource");   queue1 = gst_element_factory_make ("queue", "queue1");    queue2 = gst_element_factory_make ("queue", "queue2");  //  queue3 = gst_element_factory_make ("queue", "queue3");    h263depay = gst_element_factory_make ("rtph263pdepay", "h263depay");    avimuxer = gst_element_factory_make ("avimux", "avimuxer");    filedes = gst_element_factory_make ("filesink", "filedes");    caps = gst_caps_new_simple( "application/x-rtp", "media", G_TYPE_STRING, "video", "clock-rate",   G_TYPE_INT, 90000, "encoding-name", G_TYPE_STRING, "H263-1998", "num-buffers",G_TYPE_INT,5000,NULL);   caps2 = gst_caps_new_simple ("video/x-h263", "width", G_TYPE_INT, 320, "height", G_TYPE_INT, 240,   "framerate", GST_TYPE_FRACTION, 25, 1, NULL); //  g_object_set (G_OBJECT (udpsource), "port", 5000, NULL);   g_object_set (G_OBJECT (udpsource), "port", 5000, "caps", caps, NULL);   g_object_set (G_OBJECT (filedes), "location", "test20.avi", NULL); //  caps2 = gst_caps_new_simple("video/x-h263","width", 320, "height", 240, "framerate", 25, 1,NULL) ; /* alternative */    pipeline = gst_pipeline_new ("video-pipeline"); if (!pipeline || !udpsource || !queue1 || !queue2 || !h263depay || !avimuxer || !filedes || !caps || !caps2) {   g_printerr ("One of the element could not be created. Exiting.\n");   return -1; } //add elements to the pipeline gst_bin_add_many (GST_BIN (pipeline),                   udpsource, queue1, h263depay, caps2, avimuxer, queue2, filedes, NULL); //link the elements //gst_element_link_many (udpsource, queue1, h263depay, NULL); //gst_element_link_many (avimuxer, queue2, filedes, NULL); gst_element_link_many(udpsource, queue1, h263depay,caps2,avimuxer, queue2, filedes, NULL); //link two elements with a filter (here h263depay and queue2 with caps2 //gboolean link_ok = gst_element_link_filtered (h263depay, avimuxer, caps2); //start the pipeline gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);   gst_object_unref (GST_OBJECT (pipeline));   return 0; } <hr />Invite your mail contacts to join your friends list with Windows Live Spaces. It's easy! <a href='http://spaces.live.com/spacesapi.aspx?wx_action=create&wx_url=/friends.aspx&mkt=en-us' target='_new'>Try it!</a></body> </html>