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Re: Metadata, mp4, m4v, and mov

Subject: Re: Metadata, mp4, m4v, and mov
From: "Walls, Bryan (MSFC-IS30) mdi" <email@hidden>
Date: Wed, 13 Sep 2006 22:54:45 -0500
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Thanks for the answers!

On Sep 13, 2006, at 10:47 PM, Charles wrote:

> Could someone briefly explain to me the differences in files with mp4,
m4v, and mov extensions?

.mp4 and .m4v files are both MPEG-4 files, just with different extensions.
.mov is a QuickTime Movie.

> I'd like to include a sprite and text track, also possibly Chapters, in my
file. Does that limit me to .mov?

Yes.

> Will using a .mov limit what devices can play back my content?

Yes. Only PCs and the iPod can play QuickTime Movies.

So the PSP can play at least some MPEG-4 files that play on the iPod? Likewise for Windows handhelds?

Is there any way to present close captions (as opposed to open captions in the video stream) using MPEG-4? Or Apple/QuickTime/iPod MPEG-4, anyway?

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References:
	>Metadata, mp4, m4v, and mov (From: "Walls, Bryan (MSFC-IS30) mdi" <email@hidden>)
	>RE: Metadata, mp4, m4v, and mov (From: "Charles" <email@hidden>)

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