questions about appsink

[hugh]

Hi,  Tim Müller, it seems that there's not property named
"enable-last-sample" in appsink. It just like that:

gst-inspect-0.10 appsink
Factory Details:
  Long name:	AppSink
  Class:	Generic/Sink
  Description:	Allow the application to get access to raw buffer
  Author(s):	David Schleef <ds at schleef.org>, Wim Taymans
<wim.taymans at gmail.com>
  Rank:		none (0)

Plugin Details:
  Name:			app
  Description:		Elements used to communicate with applications
  Filename:		/usr/lib/x86_64-linux-gnu/gstreamer-0.10/libgstapp.so
  Version:		0.10.36
  License:		LGPL
  Source module:	gst-plugins-base
  Source release date:	2012-02-20
  Binary package:	GStreamer Base Plugins (Ubuntu)
  Origin URL:	
https://launchpad.net/distros/ubuntu/+source/gst-plugins-base0.10

GObject
 +----GstObject
       +----GstElement
             +----GstBaseSink
                   +----GstAppSink

实现的接口:
  GstURIHandler

Pad Templates:
  SINK template: 'sink'
    Availability: Always
    Capabilities:
      ANY


Element Flags:
  no flags set

Element Implementation:
  Has change_state() function: gst_base_sink_change_state
  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.

URI handling capabilities:
  Element can act as sink.
  Supported URI protocols:
    appsink

Pads:
  SINK: 'sink'
    Implementation:
      Has chainfunc(): gst_base_sink_chain
      Has custom eventfunc(): gst_base_sink_event
      Has custom queryfunc(): gst_base_sink_sink_query
      Has custom iterintlinkfunc(): gst_pad_iterate_internal_links_default
      Has bufferallocfunc(): gst_base_sink_pad_buffer_alloc
      Has getcapsfunc(): gst_base_sink_pad_getcaps
      Has setcapsfunc(): gst_base_sink_pad_setcaps
      Has acceptcapsfunc(): gst_pad_acceptcaps_default
      Has fixatecapsfunc(): gst_base_sink_pad_fixate
    Pad Template: 'sink'

Element Properties:
  name                : The name of the object
                        flags: 可读, 可写
                        String. Default: "appsink0"
  preroll-queue-len   : Number of buffers to queue during preroll
                        flags: 可读, 可写
                        Unsigned Integer. Range: 0 - 4294967295 Default: 0 
  sync                : Sync on the clock
                        flags: 可读, 可写
                        Boolean. Default: true
  max-lateness        : Maximum number of nanoseconds that a buffer can be
late before it is dropped (-1 unlimited)
                        flags: 可读, 可写
                        Integer64. Range: -1 - 9223372036854775807 Default:
-1 
  qos                 : Generate Quality-of-Service events upstream
                        flags: 可读, 可写
                        Boolean. Default: false
  async               : Go asynchronously to PAUSED
                        flags: 可读, 可写
                        Boolean. Default: true
  ts-offset           : Timestamp offset in nanoseconds
                        flags: 可读, 可写
                        Integer64. Range: -9223372036854775808 -
9223372036854775807 Default: 0 
  enable-last-buffer  : Enable the last-buffer property
                        flags: 可读, 可写
                        Boolean. Default: true
  last-buffer         : The last buffer received in the sink
                        flags: 可读
                        MiniObject of type "GstBuffer"
  blocksize           : Size in bytes to pull per buffer (0 = default)
                        flags: 可读, 可写
                        Unsigned Integer. Range: 0 - 4294967295 Default:
4096 
  render-delay        : Additional render delay of the sink in nanoseconds
                        flags: 可读, 可写
                        Unsigned Integer64. Range: 0 - 18446744073709551615
Default: 0 
  throttle-time       : The time to keep between rendered buffers (unused)
                        flags: 可读, 可写
                        Unsigned Integer64. Range: 0 - 18446744073709551615
Default: 0 
  caps                : The allowed caps for the sink pad
                        flags: 可读, 可写
                        Caps (NULL)
  eos                 : Check if the sink is EOS or not started
                        flags: 可读
                        Boolean. Default: true
  emit-signals        : Emit new-preroll, new-buffer and new-buffer-list
signals
                        flags: 可读, 可写
                        Boolean. Default: false
  max-buffers         : The maximum number of buffers to queue internally (0
= unlimited)
                        flags: 可读, 可写
                        Unsigned Integer. Range: 0 - 4294967295 Default: 0 
  drop                : Drop old buffers when the buffer queue is filled
                        flags: 可读, 可写
                        Boolean. Default: false

Element Signals:
  "eos" :  void user_function (GstElement* object,
                               gpointer user_data);
  "new-preroll" :  void user_function (GstElement* object,
                                       gpointer user_data);
  "new-buffer" :  void user_function (GstElement* object,
                                      gpointer user_data);
  "new-buffer-list" :  void user_function (GstElement* object,
                                           gpointer user_data);

Element Actions:
  "pull-preroll" :  GstBuffer user_function (GstElement* object);
  "pull-buffer" :  GstBuffer user_function (GstElement* object);
  "pull-buffer-list" :  GstBufferList user_function (GstElement* object);




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