[Bug 733056] Send codec specific headers as bus messages from parser plugin

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=733056
  GStreamer | gst-plugins-bad | unspecified

Gwenole Beauchesne <gb.devel> changed:

           What    |Removed                     |Added
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                 CC|                            |gb.devel at gmail.com

--- Comment #17 from Gwenole Beauchesne <gb.devel at gmail.com> 2014-07-28 06:10:13 UTC ---
(In reply to comment #15)
> All the above patches are on top of the patches i have provided in
> https://bugzilla.gnome.org/show_bug.cgi?id=704865 .
> 
> If everything is fine, then i will remove the sinkpad_allocation_query()
> virtual method implementation (which was used for GstMpegVideoMeta negotiation
> previously) in another patch together with necessary changes (some name changes
> like need-slice-header to parse-slice-header etc). 
> 
> Also I can provide another patch to vdpau plugin for supporting the new
> CapsFeature.

Initially, I wanted a mechanism to let the downstream element select what level
of meta information it needs (frame, slice, macroblock). However, I am not too
sure now. e.g. for the h264parse element, we'd ideally need slice level
information should we need proper MVC parsing (e.g. and substreaming, etc.).

Or, could we think about a flags based protocol? i.e.
xxx_{FRAME,SLICE,MACROBLOCK} would be simpler to merge from all downstream
requirements, up to including the parser element itself.

WDYT?

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