quite simple thing to test...
if the application using the CoreAVC decoder can open a quicktime movie
file containing an avc1 video track and play it correctly that easily
answers the question...
on the actual standard compliant issue I think there should be little
doubt that the Apple AVC encoder generates a compliant stream...
if in doubt just use mp4creator to extract the raw avc/h.264 video stream
from the QT movie file and feed it to the JVT (current) VM 10.2 decoder to
decode it. In my tests I've never had a single problem (Baseline and Main
Profile, all levels, which is what the ratings are).
If you're on the other hand saying that the Apple's implementation of the
AVC/H.264 encoder is not one of the best aroud that's not news neither...
X264 and Ateme to name a few provide much better compliant implementation
where better refers to 'quality' (either in terms of PSNR or Just
Noticeable Difference metrics).
best regards
andrea
PS when 'some people say CORE is the "best" H.264/AVC Decoder around' do
they just mean profile coverage? its speed?
H:=Harry
H> >
H>
H> Brings back the "good old days" the often heard cry from the electronic
H> woods (in this forum): "that Quicktime is only a container - and that the
H> codecs that sucked badly (the blockies and mosquitoes ad nauseam) - in the
H> past - were not Apple's fault".
H>
H> Now-a-days, Quicktime's focus is definitely on the variations of the
H> H.264/AVC codec (at least from Apple own business perspective - iTune/Video
H> Ipod sales of movies etc.) .
H>
H> H.264 AVC was/is supposed to be a standard. The notion was(is?) that a
H> H.264/AVC movie encoded with Apple's own H.264 encoder would play well on all
H> H.264 AVC decoders - it's called a standard, like NTSC is a standard. The
H> $64,000 question is: "is anyone in the H.264/AVC encoder/decoder industry
H> actually compliant?
H>
H> According to some people CORE is the "best" H.264/AVC Decoder around. If
H> that's true - does Apple Quicktime's H.264 play in the CORE H.264 Decoder.
H> That's a pretty understandable question about Quicktime's own H.264 codec -
H> at least, to anyone in business.
H>
H>
H>
H> >Pretty sure he meant just what he said - CORE AVC is not available as a
H> >Quicktime component. Since you specifically mentioned their *decoder*
H> >Charles' response was dead-on - this is a Quicktime list, their decoder
H> >doesn't run in Quicktime, therefore... off-topic?
H> >
H> >If you were actually meaning to ask about their *encoder* and it's
H> >compatibility with *Quicktime's decoder* then the source of confusion is
H> >obvious.
H> >
H> >So what were you asking again?
H> >
H> - Harry Pasternak
H> "The Knack" (Of Home Construction) TV Series
H>
H>
H>
H>
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--
Andrea Barbieri
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Moving Image Research, The Workshop, Hampton Lane, Bristol, BS6 6LE, UK
Tel +44 117 9732200, FAX +44 117 9732210
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