|
In the HTML help section on the Clip Context Menu of
the Timeline, it says
"You may also change video and audio for a multiple
video and multiple audio MPEG file."
Please tell me: What is a multiple video and multiple
audio file? And What may be changed?
An
MPEG file is usually composed of a video stream and
multiple audio streams, multiplexed together as one data
stream of video and audio packets.
For example, you are working with a multiple audio
MPEG file when you play a DVD movie with a set of audio
tracks for several languages.
In a recording of digital video broadcasting, one
MPEG file usually contains multiple video and multiple
audio streams, each pair of which represents on TV
programming channel.
To identify those video and audio streams, MPEG files
use one distinct integer called stream ID for each video
or audio stream. This integer is stored in the packet
header.
In the MVW, you can select video and/or audio by
switching the stream ID; and this switching is done via
the "Properties" entry in the context menu of the Input
monitor or in the context menu of a clip on the
Timeline.
|
