[Ffmpeg-devel] [Ffmpeg-devel-old] Re: avi out is buggy

Måns Rullgård mru
Mon May 9 14:56:06 CEST 2005

Michel Bardiaux <mbardiaux at peaktime.be> writes:

> Aside: IIRC DVDs use AC3 sound under the name "DTS", but am unsure

DTS is another beast entirely.  It is a codec developed by DTS Inc.
AC3 is from Dolby Labs.

> whether this is *in* some kind of A+V MPEG stream, or in a separate
> file. Hence: is AC3 audio legal in an MPEG (2) container?

ISO 13818 does not mention AC3, so AC3 in an MPEG stream is not
compliant with that standard.  The DVD spec specifies one way of
storing AC3 in MPEG-PS.  ATSC A/52 specifies an extension to the
MPEG-TS format, allowing for AC3 audio.  Other schemes for AC3 in MPEG
exists, but are less widely used.

M?ns Rullg?rd
mru at inprovide.com

More information about the ffmpeg-devel mailing list