[gst-devel] Re : Plugin creation

[Albert Costa]

Hi,
the plugin name and description can (must...) be changed in the plugin_init function and GST_PLUGIN_DEFINE macro definition in the code that must be present in your code.
Concerning the filtering itself, you must check that you have RGB (I guess that's the simplest) image buffers coming to your plugin in order to make your processing in the chain function. Best way would be to set the caps of your sink pad to video/x-rgb flow. Check other exisitng plugins to see how to do this. You'll need a ffmpegcolorspace element before your plugin to let the flow be in the good format.
The example plugin is just a skeleton, you need now to specialize it with your own code... Read the gstreamer plugin writer's guide, it will give you information.
Regards,
Al



________________________________
De : "cammille at polytech.unice.fr" <cammille at polytech.unice.fr>
À : Discussion of the development of GStreamer <gstreamer-devel at lists.sourceforge.net>
Envoyé le : Jeudi, 5 Mars 2009, 12h15mn 55s
Objet : Re: [gst-devel] Plugin creation

I found the problem ! The fact is that my plugin is not named
"testfilter".. It's named "plugin". How can I change this name ? beacause
I have never specified that my plugin is named "plugin".

Another question, : now, I would like to create a simple plugin :
I would like to filter the video taken by my webcam and filter the red
color (i would like to apply an effect like the effectv plugin).
I know the algorithm, but I'm not sure how to do that.

Do you think I should create this plugin by using the example plugin ?


> assuming that the shared library name is libgsttestfilters.so
>
> On Thu, Mar 5, 2009 at 4:28 PM, ved kpl <ved.kpl at gmail.com> wrote:
>> Try gst-inspect on your plugin
>>
>> Assuming that the plugin is installed in
>> "$HOME/gst-template/gst-plugin/src/.libs/"
>> do the following and see what you get
>>
>>  gst-inspect
>> $HOME/gst-template/gst-plugin/src/.libs/libgsttestfilters.so
>>
>> On Thu, Mar 5, 2009 at 4:15 PM,  <cammille at polytech.unice.fr> wrote:
>>> Hello !
>>> I would like to create a simple plugin such as effectv..
>>>
>>> But, first of all, I would like to create a "test plugin".
>>> So, I tried to make the example described in the GStreamer Plugin
>>> Writer's
>>> Guide.
>>>
>>> I compiled the "test plugin" with the makefile, and now I'm trying to
>>> launch this plugin, but I have an error..
>>>
>>> What's wrong with :
>>>
>>> $ gst-launch --gst-plugin-path=$HOME/gst-template/gst-plugin/src/.libs/
>>> fakesrc ! testfilters ! fakesink silent=TRUE
>>>  > WARNING: erroneous pipeline: no element "testfilters"
>>>
>>> Maybe I have forgotten something ?
>>>
>>>
>>> Thank you.
>>>
>>>
>>>
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>>
>
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> -OSBC tackles the biggest issue in open source: Open Sourcing the
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-OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise
-Strategies to boost innovation and cut costs with open source participation
-Receive a $600 discount off the registration fee with the source code: SFAD
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