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296 Working with Video
Specifying advanced audio encoding settings
The audio encoding settings portion of the dialog box is automatically selected when an
audio-only file is added to the encoding list (this portion of the dialog box is disabled when
encoding video content without a combined audio track).
To specify custom audio encoding settings:
1.
If the Encode Audio check box is not selected, select it to activate the advanced audio
encoding options.
The Encode Audio check box should be selected by default. The default audio codec is
MP3.
2.
Select a data rate from the Data rate pop-up menu.
The data rate is the bit rate of the MP3 audio stream. Better quality audio tracks, such as
music and significant background noise, require a higher bit rate. Simple dialogue, such as
with a “talking head” shot, can be compressed to a much higher degree. Higher bit rate
settings (encoded at 80 Kbps or higher) are encoded in stereo, while lower bit rate settings
(encoded at 64 Kbps or lower) are encoded in mono.
3. Click Next to move to the next panel of the Video Import wizard, or select another of the
Advanced Settings tabs to further modify the video clip.
Embedding cue points (Flash Professional only)
Cue points cause the video playback to trigger other actions within the presentation. For
example, you can create a Flash presentation that has video playing in one area of the screen
while text and graphics appear in another area. A cue point placed in the video triggers an
update to the text and graphic, letting them remain relevant to the content of the video.
Each cue point consists of a name and the time at which it occurs. You specify cue point times
in hour:minute:second:milisecond format; the default frame rate is 30 frames per second
(fps). You can specify cue point times with any frame rate, and also express them in
milliseconds rather than frame numbers.
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You can select an encoding profile from the Flash Video encoding profile pop-up menu,
which will set a corresponding profile for the audio-only encoding format.
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If the source video file has no audio track, or if you are encoding MPEG-1 files on a
Macintosh, the audio encoding settings portion of the dialog box is disabled.