[gst-devel] Capsfilter problem for rtp streaming

[Zhang, Boning]

I write a cmd line for receiving the rtp stream :

gst-launch udpsrc port=5000 caps=application/x-rtp ! rtph263pdepay ! ffdec_h263 ! filesink location=./abc.out

and it runs ok.

But I change it to C code, the application cannot run.

c code:
{
  pipeline = gst_pipeline_new ("Video-DERTP");
  rtpsrc   = gst_element_factory_make ("udpsrc",  "sourcer");
  vidCaps = gst_element_factory_make("capsfilter", "capsfilter");
  rtpdepay  = gst_element_factory_make ("rtph263pdepay", "H263+ depayload");
  decoder  = gst_element_factory_make ("ffdec_h263", "h263+ decode");
  filesink  = gst_element_factory_make ("filesink", "filesink");



    g_object_set(G_OBJECT(vidCaps), "caps",gst_caps_new_simple("application/x-rtp",
                                                        "media",G_TYPE_STRING,"video",
                                                        "payload",G_TYPE_INT,96,
                                                        "clock-rate",G_TYPE_INT,90000,
                                                        "encoding-name", G_TYPE_STRING, "ffenc_h263p",
                                                        NULL), NULL);

    g_object_set (G_OBJECT (rtpsrc), "port",5000, NULL);
    g_object_set (G_OBJECT (filesink), "location","./abc.out", NULL);


  gst_bin_add_many (GST_BIN (pipeline),rtpsrc,vidCaps,rtpdepay,decoder,filesink,NULL);
  gst_element_link_many (rtpsrc,vidCaps,rtpdepay,decoder,filesink,NULL);
}

error:
gst_capsfilter_prepare_buf:assertion 'out_caps != NULL' failed
Error Internal data flow error


Thanks
------------------------------------
Boning,Zhang






-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/gstreamer-devel/attachments/20090825/26c50843/attachment.htm>