[MPlayer-DOCS] Re: encoding guide draft
ranma at tdiedrich.de
Sun Jun 19 17:54:01 CEST 2005
Jeff Clagg wrote:
> On Sun, Jun 19, 2005 at 04:36:33PM +0200, Tobias Diedrich wrote:
> > I'm quite sure that MP3 is not supported. Only MP2,AC3,PCM and
> > optionally DTS are supported.
> My understanding is that you're right, except that MP2 was not included
> in the NTSC spec, and it's somewhat common to find NTSC players that
> don't handle DVDs with MP2 audio. Unofficially, there are plenty of
> nonstandard combinations that some players tolerate, and MP3 audio is
> just one of many.
Right. Now that you mention it...
Wikipedia (http://en.wikipedia.org/wiki/DVD-Video) says:
|The audio data on a DVD movie can be of the format PCM, DTS, MPEG
|audio, or Dolby Digital (AC-3). In countries using the NTSC standard
|any movie should contain a sound track in (at least) either PCM or
|Dolby AC-3 formats, and any NTSC player must support these two; all
|the others are optional. This ensures any standard compatible disc
|can be played on any standard compatible player. The vast majority
|of commercial NTSC releases today employ AC-3 audio.
|Initially, in countries using the PAL standard (e.g. most of Europe)
|the sound of DVD was supposed to be standardized on PCM and MPEG-2
|audio, but apparently against the wishes of Philips, under public
|pressure on December 5, 1997, the DVD Forum accepted the addition of
|Dolby AC-3 to the optional formats on discs and mandatory formats in
|players. The vast majority of commercial PAL releases employ AC-3
|audio by now.
Tobias PGP: http://9ac7e0bc.uguu.de
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