Does decodebin need parser

[deepthi ps]

In reference to
http://gstreamer-devel.966125.n4.nabble.com/Does-decodebin-need-parser-td4693696.html


I have an element which acts as a combined video decoder + video sink
for video/x-xyz.
So it has only SINK pad.
Rank is PRIMARY
Pad Templates:
  SINK template: 'sink'
    Availability: Always
    Capabilities:
      video/x-xyz
Class is specified as Decoder/Video/Sink
I dont have a parser element for  video/x-xyz as my decoder can handle
video/x-xyz. But decodebin is not selecting my decoder. In this case, why
is the parser required?
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