Pluggable Bin

[MartinK]

Hi.I have tried to create a Pluggable bin element which, at the moment, is
just a bin containing two NullFilter elements linked together. A NullFilter
is a raw video filter which simply copies input to output. The NullFilter
itself has been tested and works. Also, the PluginLoader is tested and
works. The test pipeline works if PluggableBin is replaced by
NullFilter.However, the PluggableBin fails with the following
messages:Pipeline is PREROLLING ...ERROR: from element
/GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0: Internal data flow
error.Additional debug info:gstbasesrc.c(2625): gst_base_src_loop ():
/GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0:streaming task paused,
reason not-linked (-1)ERROR: pipeline doesn't want to preroll.Links to the
sources and test pipeline are given below.Is anyone able to shed any light
on what might be wrong?Regards,  Martin PluginLoader.c
<http://gstreamer-devel.966125.n4.nabble.com/file/n4665427/PluginLoader.c>  
PluginLoader.h
<http://gstreamer-devel.966125.n4.nabble.com/file/n4665427/PluginLoader.h>  
PluggableBin.c
<http://gstreamer-devel.966125.n4.nabble.com/file/n4665427/PluggableBin.c>  
PluggableBin.h
<http://gstreamer-devel.966125.n4.nabble.com/file/n4665427/PluggableBin.h>  
NullFilter.c
<http://gstreamer-devel.966125.n4.nabble.com/file/n4665427/NullFilter.c>  
NullFilter.h
<http://gstreamer-devel.966125.n4.nabble.com/file/n4665427/NullFilter.h>  
NullBin <http://gstreamer-devel.966125.n4.nabble.com/file/n4665427/NullBin>  



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