vaapidecode problem

[Gofrane]

*thank you

when I run* gst-inspect-1.0 vaapidecode
*I got this*

Factory Details:
  Rank                     primary (256)
  Long-name                VA-API decoder
  Klass                    Codec/Decoder/Video
  Description              A VA-API based video decoder
  Author                   Gwenole Beauchesne <gwenole.beauchesne at intel.com>

Plugin Details:
  Name                     vaapi
  Description              VA-API based elements
  Filename                
/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so
  Version                  0.5.7
  License                  LGPL
  Source module            gstreamer-vaapi
  Binary package           gstreamer-vaapi
  Origin URL               gwenole.beauchesne at intel.com

GObject
 +----GInitiallyUnowned
       +----GstObject
             +----GstElement
                   +----GstVideoDecoder
                         +----GstVaapiDecode

Pad Templates:
  SINK template: 'sink'
    Availability: Always
    Capabilities:
      video/mpeg
            mpegversion: 2
           systemstream: false
      video/mpeg
            mpegversion: 4
      video/x-divx
      video/x-xvid
      video/x-h263
      video/x-h264
      video/x-wmv
      image/jpeg

  SRC template: 'src'
    Availability: Always
    Capabilities:
      video/x-raw(memory:VASurface)
                 format: { ENCODED, NV12, I420, YV12 }
                  width: [ 1, 2147483647 ]
                 height: [ 1, 2147483647 ]
              framerate: [ 0/1, 2147483647/1 ]
      video/x-raw(meta:GstVideoGLTextureUploadMeta)
                 format: RGBA
                  width: [ 1, 2147483647 ]
                 height: [ 1, 2147483647 ]
              framerate: [ 0/1, 2147483647/1 ]


Element Flags:
  no flags set

Element Implementation:
  Has change_state() function: gst_video_decoder_change_state

Element has no clocking capabilities.
Element has no indexing capabilities.
Element has no URI handling capabilities.

Pads:
  SINK: 'sink'
    Implementation:
      Has chainfunc(): gst_video_decoder_chain
      Has custom eventfunc(): gst_video_decoder_sink_event
      Has custom queryfunc(): 0x7f6ab118c7c0
      Has custom iterintlinkfunc(): gst_pad_iterate_internal_links_default
    Pad Template: 'sink'
  SRC: 'src'
    Implementation:
      Has custom eventfunc(): gst_video_decoder_src_event
      Has custom queryfunc(): 0x7f6ab118c7c0
      Has custom iterintlinkfunc(): gst_pad_iterate_internal_links_default
    Pad Template: 'src'

Element Properties:
  name                : The name of the object
                        flags: readable, writable
                        String. Default: "vaapidecode0"
  parent              : The parent of the object
                        flags: readable, writable
                        Object of type "GstObject"




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