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POGstreamer source code doesnt work
 

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  1. POGstreamer source code doesnt work
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    <p>i have the following pipelines that one of them sends voice signals on udp port and the other receives them on the same port number on the receiver side</p> <pre><code> gst-launch-1.0 -v alsasrc ! audioconvert ! audio/x-raw,channels=2,depth=16,width=16,rate=44100 ! rtpL16pay ! udpsink host=127.0.0.1 port=5000 //sender </code></pre> <p>and </p> <pre><code>gst-launch-1.0 udpsrc port=5000 ! "application/x-rtp, media=(string)audio, clock-rate=(int)44100, encoding-name=(string)L16, channels=(int)2, payload=(int)96" ! rtpL16depay ! audioconvert ! alsasink //receiver </code></pre> <p>now i am trying to write a source code using Gstreamer SDK that does the same thing. I have come so far:</p> <pre><code>#include &lt;gst/gst.h&gt; #include &lt;string.h&gt; int main(int argc, char *argv[]) { GstElement *pipeline, *source, *audiosink,*rtppay,*rtpdepay,*filter,*filter1,*conv,*conv1,*udpsink,*udpsrc,*receive_resample; GstBus *bus; GstMessage *msg; GstCaps *filtercaps; GstStateChangeReturn ret; /* Initialize GStreamer */ gst_init (&amp;argc, &amp;argv); /* Create the elements */ source = gst_element_factory_make ("alsasrc", "source"); conv= gst_element_factory_make ("audioconvert", "conv"); conv1= gst_element_factory_make ("audioconvert", "conv1"); filter=gst_element_factory_make("capsfilter","filter"); rtppay=gst_element_factory_make("rtpL16pay","rtppay"); rtpdepay=gst_element_factory_make("rtpL16depay","rtpdepay"); udpsink=gst_element_factory_make("udpsink","udpsink"); audiosink = gst_element_factory_make ("autoaudiosink", "audiosink"); receive_resample = gst_element_factory_make("audioresample", NULL); udpsrc=gst_element_factory_make("udpsrc",NULL); filter1=gst_element_factory_make("capsfilter","filter"); g_object_set(udpsrc,"port",5000,NULL); g_object_set (G_OBJECT (udpsrc), "caps", gst_caps_from_string("application/x-rtp,media=audio,payload=96,clock-rate=44100,encoding-name=L16,channels=2"), NULL); /* Create the empty pipeline */ pipeline = gst_pipeline_new ("test-pipeline"); if (!pipeline || !source || !filter || !conv || !rtppay || !udpsink ) { g_printerr ("Not all elements could be created.\n"); return -1; } g_object_set(G_OBJECT(udpsink),"host","127.0.0.1",NULL); g_object_set(G_OBJECT(udpsink),"port",5000,NULL); filtercaps = gst_caps_new_simple ("audio/x-raw", "channels", G_TYPE_INT, 2, "width", G_TYPE_INT, 16, "depth", G_TYPE_INT, 16, "rate", G_TYPE_INT, 44100, NULL); g_object_set (G_OBJECT (filter), "caps", filtercaps, NULL); gst_caps_unref (filtercaps); filtercaps = gst_caps_new_simple ("application/x-rtp", "media",G_TYPE_STRING,"audio", "clock-rate",G_TYPE_INT,44100, "encoding-name",G_TYPE_STRING,"L16", "channels", G_TYPE_INT, 2, "payload",G_TYPE_INT,96, NULL); g_object_set (G_OBJECT (filter1), "caps", filtercaps, NULL); gst_caps_unref (filtercaps); /* Build the pipeline */ gst_bin_add_many (GST_BIN (pipeline), source,filter,conv,rtppay,udpsink, NULL); if (gst_element_link_many (source,filter,conv,rtppay,udpsink, NULL) != TRUE) { g_printerr ("Elements could not be linked.\n"); gst_object_unref (pipeline); return -1; } gst_bin_add_many (GST_BIN (pipeline),udpsrc,rtpdepay,conv1,receive_resample,audiosink,NULL); if (gst_element_link_many (udpsrc,rtpdepay,conv1,receive_resample,audiosink,NULL) != TRUE) { g_printerr ("Elements could not be linked.\n"); gst_object_unref (pipeline); return -1; } /* Modify the source's properties */ // g_object_set (source, "pattern", 0, NULL); /* Start playing */ ret = gst_element_set_state (pipeline, GST_STATE_PLAYING); if (ret == GST_STATE_CHANGE_FAILURE) { g_printerr ("Unable to set the pipeline to the playing state.\n"); gst_object_unref (pipeline); return -1; } /* Wait until error or EOS */ bus = gst_element_get_bus (pipeline); msg = gst_bus_timed_pop_filtered (bus, GST_CLOCK_TIME_NONE, GST_MESSAGE_ERROR | GST_MESSAGE_EOS); /* Parse message */ if (msg != NULL) { GError *err; gchar *debug_info; switch (GST_MESSAGE_TYPE (msg)) { case GST_MESSAGE_ERROR: gst_message_parse_error (msg, &amp;err, &amp;debug_info); g_printerr ("Error received from element %s: %s\n", GST_OBJECT_NAME (msg-&gt;src), err-&gt;message); g_printerr ("Debugging information: %s\n", debug_info ? debug_info : "none"); g_clear_error (&amp;err); g_free (debug_info); break; case GST_MESSAGE_EOS: g_print ("End-Of-Stream reached.\n"); break; default: /* We should not reach here because we only asked for ERRORs and EOS */ g_printerr ("Unexpected message received.\n"); break; } gst_message_unref (msg); } /* Free resources */ gst_object_unref (bus); gst_element_set_state (pipeline, GST_STATE_NULL); gst_object_unref (pipeline); return 0; } </code></pre> <p>but somehow i dont receive any voice on the receiver. i dont get any errors of any kind. Any ideas why this is happening?</p>
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