[Bug 732265] vaapidecode: h264: add support for decoding MVC base views only

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=732265

--- Comment #24 from Víctor Manuel Jáquez Leal <vjaquez at igalia.com> ---
(In reply to Orestis Floros from comment #22)
> > @@ +1222,3 @@
> > +  }
> > +
> > +  if (base_only && !have_mvc && have_high) {
> >
> > If va backend doesn't profile mvc profiles but has high profile, I would set
> > base_only as TRUE mandatory.
> 
> Ok. This means that gstvaapidecode doesn't need to get the value of
> base_only since it won't use it anywhere. It need to set base_only
> accordingly though.

I would use base_only property if the use doesn't want MVC/SVC support on
purpose.

But it will be definitely useful for user that their hardware doesn't have
support and still they will be able to playback the media.

(In reply to Orestis Floros from comment #23)
> 
> It would also mean that h264parse won't be able to use the changes in bug
> 732267 because vaapih264dec would fake MVC/SVC support.

h264parse change is useful for avdec_h264 users or any other decoder that might
not handle MVC/SVC streams.

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