[Bug 732266] vaapidecode: h264: add support for decoding SVC base layers only
GStreamer (GNOME Bugzilla)
bugzilla at gnome.org
Fri Aug 18 17:19:17 UTC 2017
https://bugzilla.gnome.org/show_bug.cgi?id=732266
--- Comment #13 from sreerenj <bsreerenj at gmail.com> ---
(In reply to Orestis Floros from comment #12)
> (In reply to sreerenj from comment #11)
> > You are almost there :)
> >
> > For MVC and SVC, Prefix NALs should always come before a base layer slice
> > nal. H264parse code is not dealing it correctly.
> > As you said "complete = xxxx" shouldn't include the prefix-nal checking.
> > On top of that, the picture_start finding should include the prefix nal and
> > the slice extension nal.
>
> Actually, we can completely skip prefix nal units when searching for the
> next nalu, nnalu, in SVC streams. This way we can end the au when
> first_mb_in_slice == 0 for the associated slice unit.
Yup.
>
> That said, if h264parse AU detection is faulty for SVC streams shouldn't the
> same apply to MVC streams as well?
Yes, it should be broken for MVC too.
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