After downsizing and reencoding
the video (and possibly decoding
the AC3-Stream), the
video and audio part of the original
material have to be brought back
together. This step is also called
Multiplexing of Audio and Video
(this means bringing audio
and video back together).
Dependent on your desires you
have two possibilities. But
if you already encoded the video
you must have already chosen
one. For people with Dolby
Digital receivers it is
useful to conserve the AC3-stream
and use a smaller video-bitrate.
(AC3 is considerably
larger in size than MP3:
AC3-bitrate: 384-448
kbit/s ; MP3-bitrate:
you may choose but 128-160 kbit/s
give good quality ; OGG Vorbis-bitrate:
even lower than MP3 ~80 kbit/s).
Personally I prefer having the
Dolby Digital Sound.
Depending on your choice choose
the appropriate section on multiplexing:
[Multiplexing
with AC3 Dolby Digital]
Extremely High Quality Sound,
but degraded picture
quality
[Multiplexing
with MP3/OGG Vorbis Encoded
Sound]
Good Dolby Surround Sound,
with higher picture brilliance
and quality
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Written:
January 23rd, 2001 @ 18:39