[gstreamer-bugs] [Bug 527488] New: Gstreamer can't load and create Elements with request pads from XML

GStreamer (bugzilla.gnome.org) bugzilla-daemon at bugzilla.gnome.org
Thu Apr 10 23:44:31 PDT 2008


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  GStreamer | common | Ver: 0.10.19
           Summary: Gstreamer can't load and create Elements with request
                    pads from XML
           Product: GStreamer
           Version: 0.10.19
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: Normal
         Component: common
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: Dimitri.Herzog at thomson.net
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: 2.21/2.22
   GNOME milestone: Unspecified


Gstreamer has some problems with XML.

Example:

gst-launch videotestsrc ! tee name=t ! {queue ! ximagesink }
{ t. ! queue ! ximagesink }

this will create a videosource, that will be splitted to two videosinks. Thats
works. But if you save it to XML (with -o name.xml) and run it again with
gst-xmllaunch name.xml you will see only one videosink. Reason: the tee element
has only one sink pad instead of two, but in the xml file you can see two sink
pads.

if tried this example with some c-code:

if you load this xml file with:

GstXML* xml = gst_xml_new ();
bool ret = gst_xml_parse_file (xml, (guchar*)"/home/herzogd/Desktop/test.xml",
NULL);
GstElement *pipeline = gst_xml_get_element (xml, (guchar*)"pipeline0");
GstElement *tee = gst_xml_get_element (xml, (guchar*)"tee0");

g_print("src count: %d", tee->numsrcpads);

you will see, that the tee element had only one srcpad (should be two)!

I've made some experiments:

tee -> one sink       tee->numsrcpads = 1, that is correct
tee -> tho sinks       tee->numsrcpads = 1, that is NOT correct (should be 2)
tee -> three sinks       tee->numsrcpads = 2, that is NOT correct (should be 3)


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