[gst-devel] Problem in pad negotiation

[Vikas Patel]

Hi sudarshan,

 

 I get this kind of caps at sink pad

 

Pad Templates:

  SINK template: 'sink'

    Availability: Always

    Capabilities:

      video/mpeg

            mpegversion: 4

           systemstream: false

                  width: [ 16, 4096 ]

                 height: [ 16, 4096 ]

              framerate: [ 1, 60 ]

 

 

Regards

Vikas

 

________________________________

From: sudarshan bisht [mailto:bisht.sudarshan at gmail.com] 
Sent: Tuesday, December 30, 2008 3:55 PM
To: Discussion of the development of GStreamer
Subject: Re: [gst-devel] Problem in pad negotiation

 

Hi Vikas , 

 

              Can u tell me when you do gst-inspect ur-decoder-plugin ,
what caps u get at sink pad ? 

On Tue, Dec 30, 2008 at 3:24 PM, Vikas Patel <Vikas.Patel at imgtec.com>
wrote:

Hi,

I'm developing a Gstreamer plugin for video decoder.

But when I try to create a complete pipeline by connecting with
ffmpegcolorscale plugin it throws a error by saying that...

 

"pad returned caps ANY which are not a real subset of its template caps
video/x-raw-yuv, format=(fourcc){ YV12, I420, Y42B }, width=(int)[ 16,
4096 ], height=(int)[ 16, 4096 ], framerate=(int)[ 1, 60 ]"

 

 

Template for sink is like as

 

static GstPadTemplate *src_templ (void)

{

    static GstPadTemplate *templ = NULL;

 

    if (!templ) 

    {

        GstCaps *caps;

        GstStructure *structure;

        GValue list = { 0 } ,fmt = { 0};

        char *fmts[] = { "YV12", "I420", "Y42B", NULL };

        guint n;

 

        caps = gst_caps_new_simple ("video/x-raw-yuv",

                                    "format", GST_TYPE_FOURCC,

                                        GST_MAKE_FOURCC ('I', '4', '2',
'0'),

                                    "width", GST_TYPE_INT_RANGE, 16,
4096,

                                    "height", GST_TYPE_INT_RANGE, 16,
4096, 

                                    "framerate", GST_TYPE_INT_RANGE,  1,
60,

                                    NULL);

 

        structure = gst_caps_get_structure (caps, 0);

 

        g_value_init (&list, GST_TYPE_LIST);

        g_value_init (&fmt, GST_TYPE_FOURCC);

        for (n = 0; fmts[n] != NULL; n++) 

        {

            gst_value_set_fourcc (&fmt, GST_STR_FOURCC (fmts[n]));

            gst_value_list_append_value (&list, &fmt);

        }

        gst_structure_set_value (structure, "format", &list);

        g_value_unset (&list);

        g_value_unset (&fmt);

 

        templ = gst_pad_template_new ("src", GST_PAD_SRC,
GST_PAD_ALWAYS, caps);

    }

  return templ;

}

 

 

Please let me know where I am wrong.

 

Regards

Vikas

 

 


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-- 
Regards,

Sudarshan Bisht

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