[Bug 757419] openh264enc: add support for cabac entropy coding

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=757419

--- Comment #3 from Sebastian Dröge (slomo) <slomo at coaxion.net> ---
(In reply to Nicola from comment #2)
> (In reply to Sebastian Dröge (slomo) from comment #1)
> > The profile should be negotiated with downstream via caps
> 
> For what I understand cabac generate an h264 stream with "high" profile
> while cavlc a "baseline" profile. I don't think we can have cavlc and high
> profile or cabac and baseline profile.

AFAIK high profile allows cabac and cavlc. And high profile also includes lots
of other features that are not in baseline.

> Do you mean we need to use
> cabac/cavlc without a property but based on downstream caps or both?

If downstream wants baseline profile but the property is set, we should either
ignore the property or error out.

> we need to mantain compatibility with openh264 version < 1.5? (no cabac
> there)

Yes

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