Newbie query: Boilerplate code created by gst-element-maker does not compile

Mandeep Sandhu mandeepsandhu.chd at
Wed Oct 31 03:55:36 PDT 2012


How does one make an existing gstreamer package (installed in Ubuntu
12.10) recognize/register a custom plugin?


On Mon, Oct 29, 2012 at 7:13 PM, Mandeep Sandhu
<mandeepsandhu.chd at> wrote:
> Hi All,
> I'm newbie who's recently jumped into playing around with GStreamer.
> I have gone through "GStreamer Application Development Manual" to get
> a basic idea of the various Gstreamer concepts. Currently, I'm reading
> the "GStreamer Plugin Writer's Guide (1.0.2)" to get a very basic
> plugin working (only for my own understanding).
> For creating the basic template of a plugin, I was using the
> "make_element" tool which comes along with the gst-template repo.
> The template code created by this tool compiles fine, however it does
> not get recognized when I try to use it a sample pipeline. I construct
> the pipline as follows (after building the plugin):
> $ gst-launch-0.10 -v
> --gst-plugin-path=/home/mandeep/work/gstreamer/gst-template/gst-plugin/src/.libs/
> fakesrc ! myfilter ! fakesink silent=TRUE
> WARNING: erroneous pipeline: no element "myfilter"
> $
> Somehow, my plugin is not 'registered' with gstreamer. Any idea how to
> get this working?
> The plugin guide has a "NOTE" that states one should use
> "gst-element-maker" from the gst-plugins-bad repo. However, the
> template code created by this tool does not compile. Here's what I
> did:
> $ gst-element-maker MyFilter basesink
> ../../../gst-plugins-bad/tools/gst-element-maker: 376:
> ../../../gst-plugins-bad/tools/gst-element-maker: gst-indent: not
> found
> pkg is gstreamer-base-0.10
> gstmyfilter.c: In function ‘gst_myfilter_base_init’:
> gstmyfilter.c:109:3: warning: implicit declaration of function
> ‘gst_element_class_set_static_metadata’
> [-Wimplicit-function-declaration]
> gstmyfilter.c: At top level:
> gstmyfilter.c:324:1: error: ‘myfilter’ undeclared here (not in a function)
> Any idea how to fix this error?
> The files generated by the above command are: gstmyfilter.h and
> gstmyfilter.c (I have altered accordingly to add these 2
> new files for building.
> Regards,
> -mandeep

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