Hi Michel,
 
                 Nice to have reply back. element yuv doen't do much thing. It reads data from buffer sent from filesrc, parse the raw video data and push buffer to next element which is mpeg4dec. For testing purpose i have set sink and source pad of yuv element to ANY. Following pipeline is working fine.
 
[         ] gst-launch-0.10 filesrc location=~/test.m4v ! yuv ! mpeg4dec ! filesink location=~/out.yuv
 
            My mpeg4dec element reads data from yuv elemnet, decode it and generate output in YV12 format. When i connect mpeg4dec with ffmpegcolorspace element it crashes. I am not doing any set capabilities for mpeg4dec element. When i create srcfactory pad, i have assigned following details.
 
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("ANY")
    );
 
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("video/x-raw-yuv, "
        "format = (fourcc) {YV12 }, "
        "framerate = (fraction) [0/1, MAX], "
        "width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]")
//    GST_STATIC_CAPS ("ANY")
    );
            Please help me and correct me if i am wrong at any places.
 
 
Thanks In Advance,
Tejas.
 
 
            Please help me out.
     
----- Original Message -----
From: Tejas Bhanabhagavanwala
To: gstreamer-embedded@lists.sourceforge.net
Sent: Wednesday, November 18, 2009 6:25 PM
Subject: Need Help to run my plugin

Hi All,
           I have installed gstreamer-0.10.25 and gstreamer-base-plugins-0.10.25. And i have tested following video testsrc plugins.
 
 
gst-launch-0.10 -v videotestsrc ! ffmpegcolorspace ! ximagesink and it is working fine.
 
 
            I have develop following 2 plugins and i want to get display from my video decoder. I am using following pipe line.
 
 
gst-launch-0.10 filesrc location=~/test.m4v ! yuv ! mpeg4dec ! ffmpegcolorspace ! ximagesink
 
            Here yuv plugin will read raw data from filesrc and push raw data to mpeg4decelement. Mpeg4dec element decode raw data and genearte yuv data and same will be pushed to ffmpegcolorspace element. When i run that pipeline it gives me following error.
 
space
Setting pipeline to PAUSED ...
Width = 320 Height = 240
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
(MPEG4DEC) Memory is not allocated
 !!Caught SIGSEGV accessing address 0x10
Killed
                    My plugons capabilities are as followed.
[    ] gst-inspect-0.10 yuv is as followed.
 
Factory Details:
  Long name:    yuv
  Class:        FIXME:Generic
  Description:  FIXME:Generic Template Element
  Author(s):    Neelam Gaikwad <<user@hostname.org>>
  Rank:         none (0)
 
Plugin Details:
  Name:                 yuv
  Description:          Template yuv
  Filename:             /home/neelam/.gstreamer-0.10/plugins/lib/gstreamer-0.10/libgstyuv.so
  Version:              0.10.0.1
  License:              LGPL
  Source module:        gst-plugin
  Binary package:       GStreamer
  Origin URL:           http://gstreamer.net/
 
GObject
 +----GstObject
       +----GstElement
             +----Gstyuv
 
Pad Templates:
  SINK template: 'sink'
    Availability: Always
    Capabilities:
      ANY
 
  SRC template: 'src'
    Availability: Always
    Capabilities:
      ANY
 

Element Flags:
  no flags set
 
Element Implementation:
  Has change_state() function: 0x111600
  Has custom save_thyself() function: gst_element_save_thyself
  Has custom restore_thyself() function: gst_element_restore_thyself
 
Element has no clocking capabilities.
Element has no indexing capabilities.
Element has no URI handling capabilities.
 
Pads:
  SRC: 'src'
    Implementation:
    Pad Template: 'src'
  SINK: 'sink'
    Implementation:
      Has chainfunc(): gst_yuv_chain
    Pad Template: 'sink'
 
Element Properties:
  name                : The name of the object
                        flags: readable, writable
                        String. Default: null Current: "yuv0"
  silent              : Produce verbose output ?
                        flags: readable, writable
                        Boolean. Default: false Current: false
 
 

[    ] gst-inspect-0.10 mpeg4dec is as followed.
 
Factory Details:
  Long name:    mpeg4dec
  Class:        FIXME:Generic
  Description:  FIXME:Generic Template Element
  Author(s):    Neelam Gaikwad <<user@hostname.org>>
  Rank:         none (0)
 
Plugin Details:
  Name:                 mpeg4dec
  Description:          Template mpeg4dec
  Filename:             /home/neelam/.gstreamer-0.10/plugins/lib/gstreamer-0.10/libgstmpeg4dec.so
  Version:              0.10.0.1
  License:              LGPL
  Source module:        gst-plugin
  Binary package:       GStreamer
  Origin URL:           http://gstreamer.net/
 
GObject
 +----GstObject
       +----GstElement
             +----Gstmpeg4dec
 
Pad Templates:
  SINK template: 'sink'
    Availability: Always
    Capabilities:
      ANY
 
  SRC template: 'src'
    Availability: Always
    Capabilities:
      video/x-raw-yuv
                 format: { YV12 }
              framerate: [ 0/1, 2147483647/1 ]
                  width: [ 1, 2147483647 ]
                 height: [ 1, 2147483647 ]
 

Element Flags:
  no flags set
 
Element Implementation:
  Has change_state() function: 0xc97240
  Has custom save_thyself() function: gst_element_save_thyself
  Has custom restore_thyself() function: gst_element_restore_thyself
 
Element has no clocking capabilities.
Element has no indexing capabilities.
Element has no URI handling capabilities.
 
Pads:
  SRC: 'src'
    Implementation:
    Pad Template: 'src'
  SINK: 'sink'
    Implementation:
      Has chainfunc(): gst_mpeg4dec_chain
    Pad Template: 'sink'
 
Element Properties:
  name                : The name of the object
                        flags: readable, writable
                        String. Default: null Current: "mpeg4dec0"
  silent              : Produce verbose output ?
                        flags: readable, writable
                        Boolean. Default: false Current: false
                       
 
                    Please help me to resolve this issue. If i am wrong at any place please correct me. I am using by default setcaps and getcaps function which we are generating from gst-template-master source code.
 
 
-Thanks In Advance,
Tejas.