Antwort: Re: decodebin2 and plugins

[Steffen.Roeber at hella.com]

Ok. I did the following:
static gboolean
examplefilter_init (GstExampleFilter * examplefilter)
{
  GST_DEBUG_CATEGORY_INIT (gst_example_filter_debug, "examplefilter", 0, 
"Template examplefilter");

  return gst_element_register (examplefilter, "examplefilter", GST_RANK_
MARGINAL, GST_ELEMENT_FACTORY_TYPE_DECODER);
}

static void gst_example_filter_base_init (gpointer gclass)
{
  GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);

  gst_element_class_set_details_simple(element_class,
    "ExampleFilter",
    "Decoder/Video",
    "Description",
    "Steffen Roeber");

  gst_element_class_add_pad_template (element_class, 
gst_static_pad_template_get (&src_factory));
  gst_element_class_add_pad_template (element_class, 
gst_static_pad_template_get (&sink_factory));
}

The _init() functions of my decoder are called. But the 
gst_example_filter_set_caps is not called. I always get a Your GStreamer 
installation is missing a plug-in. message.
Whcih function should be called at my Plugin at next? I found that the 
gst_riff_create_video_caps function returned 0, because it did not find my 
native fourcc code. How is the fourcc transmitted to my plugin and how 
should I check it?

Hella Aglaia Mobile Vision GmbH
Steffen Roeber
Firmware & Tools
Treskowstr. 14, D-13089 Berlin
Amtsgericht Berlin-Charlottenburg HRB 66976 B
Geschäftsführer: Kay Talmi

Fon:  +49 30 200 04 29? 412
Fax:  +49 30 200 04 29? 109
Mail: Steffen.Roeber at hella.com
URL: www.aglaia-gmbh.de

URL: www.mobilevision.de

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Sebastian Dröge/

( 
Gesendet von: 
gstreamer-devel-bounces+steffen.roeber=hella.com at lists.freedesktop.org
05.09.2011 13:44
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Re: decodebin2 and plugins






On Mon, 2011-09-05 at 13:16 +0200, Steffen.Roeber at hella.com wrote:
> 
> Hi, 
> I tried to create a decoder for our native avi files. But I cannot
> find an example of how to use it, so that decodebin2 does regconize it
> as a valid decoder plugin. Can anybody help me? 

You have to give it a rank >= GST_RANK_MARGINAL and add "Decoder" to the
element factory classification. The decoder element with the highest
rank that accepts the stream's caps will be selected by decodebin2.
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