[gstreamer-bugs] [Bug 349902] New: [LADSPA] effects with only src pads never go past prerolling

[GStreamer (bugzilla.gnome.org)]

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 GStreamer | gst-plugins-good | Ver: HEAD CVS

           Summary: [LADSPA] effects with only src pads never go past
                    prerolling
           Product: GStreamer
           Version: HEAD CVS
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: major
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: gnome at jonobacon.org
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: 2.13/2.14
   GNOME milestone: Unspecified


Please describe the problem:
When testing LADSPA plug-ins that only have a src pad, the pipeline never gets
beyong prerolling. I have tested this with two elements:

gst-launch-0.10 ladspa-logistic ! audioconvert ! alsasink

gst-launch-0.10 ladspa-Roessler ! audioconvert ! alsasink

I get:

jono at forge:/sources/gstreamer/head/gst-plugins-good/ext/ladspa$ gst-launch-0.10
ladspa-logistic ! audioconvert ! alsasink

(gst-launch-0.10:18277): GStreamer-CRITICAL **:
gst_element_class_add_pad_template: assertion
`gst_element_class_get_pad_template (klass, templ->name_template) == NULL'
failed

(gst-launch-0.10:18277): GStreamer-CRITICAL **:
gst_element_class_add_pad_template: assertion
`gst_element_class_get_pad_template (klass, templ->name_template) == NULL'
failed
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...

and...

jono at forge:/sources/gstreamer/head/gst-plugins-good/ext/ladspa$ gst-launch-0.10
ladspa-Roessler ! audioconvert ! alsasink

(gst-launch-0.10:18328): GStreamer-CRITICAL **:
gst_element_class_add_pad_template: assertion
`gst_element_class_get_pad_template (klass, templ->name_template) == NULL'
failed

(gst-launch-0.10:18328): GStreamer-CRITICAL **:
gst_element_class_add_pad_template: assertion
`gst_element_class_get_pad_template (klass, templ->name_template) == NULL'
failed
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...

At that point, it just hangs until I stop gst-launch with Ctrl-C.

Steps to reproduce:
1. 
2. 
3. 


Actual results:


Expected results:


Does this happen every time?


Other information:


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