wm4 <nfxjfg <at> googlemail.com> writes:

> On Tue, 16 Feb 2016 08:32:40 +0000 (UTC)
> Carl Eugen Hoyos <cehoyos <at> ag.or.at> wrote:
> 
> > Rick Kern <kernrj <at> gmail.com> writes:
> > 
> > > +enabled vtenc             && 
> > > require VideoToolbox VideoToolbox/VTCompressionSession.h 

I cut away the relevant part here, sorry:
VTCompressionSessionPrepareToEncodeFrames

> > On which osx systems is this header not available?
> 
> The same where videotoolbox decoding is not available, maybe.

Above is supported since 10.9 which in turn is 
supported on hardware that was sold from 2009 on.
I believe it should be autodetected to avoid bitrot.

Carl Eugen

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