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Apple.com h.264 trailes

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arvidb
Apple.com h.264 trailes
on Jan 12, 2007 at 10:55:19 am

Hey,
The HD trailers on apple.com, are they encoded by apple, or delivered as ready-made h.264 mp4-files by production companies?
More specifically, what tools are they using to encode it?

We have a demand from our clients to delivering that exact format, but even talking to MainConcept about it didn't reveal any answers. We need to find a quick way to encode this type of file. There's a lot of confusion around this codec, whether it's an apple-version of h.264, or "true" h.264, and if there's a difference between an apple .mp4 file and a .mov-file encoded with h.264, and so on.

So any insight into the creation of the apple trailers would be most appreciated!

Thanks,
Arvid


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Ed
Re: Apple.com h.264 trailes
by
on Jan 12, 2007 at 3:00:31 pm

Apple's implementation conforms to what's known in the specs for H.264 as the Main Profile.
Here's an explanation:
http://en.wikipedia.org/wiki/H.264
Scroll to Profiles to see what they are, then scroll to Software Implementations to see
what Apple conforms to.
I don't know who compresses the trailers.
Ed


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Charles Simonson
Re: Apple.com h.264 trailes
on Jan 12, 2007 at 3:26:43 pm

Most of the encodes on apple.com are encoded by Apple themselves. They are "true" H.264 files, just that most often they are included in a .mov wrapper in order to better support web embedding and metadata. In order to verify .mp4 compatibility, all you would have to do is open one of the .mov H.264 encodes and select Export to MPEG-4 and choose the option for pass-through for both the video and audio.



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arvidb
Re: Apple.com h.264 trailes
on Jan 16, 2007 at 12:30:00 pm


I see, thanks. Some say that apples h.264 is just a version of it, but it's good to know it's the real thing, and that you can transfer losslessly to another container format. How about transferring between ts/mkv and mov/mp4?


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Charles Simonson
Re: Apple.com h.264 trailes
on Jan 16, 2007 at 3:56:15 pm

ts/mkv? Apple's encoder only encodes to .mov, .m4v, or .mp4, all of which can be transferable between each other. I am pretty sure that QT doesn't have any real support for tranpsort streams.



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