TUTORIAL: GETTING TO KNOW YOUR CISCO DIGITAL MEDIA ENCODER 2000
NOTE: Some players, such as Quicktime
®
player, are not compatible with streams that include
B frames. If your resulting stream has quality issues on playback, try disabling B frames to ensure
compatibility with most players.
NOTE: The Video/Encoder Quality setting is currently not active and will not affect the results of
the encoding stream or file.
The Advanced MPEG Audio Settings, provide you with several Audio Formats, Audio Types,
Audio Encoders, and Bitrates from which to choose. These choices include several options as to
audio sampling, and whether the audio is to be encoded monophonically (mono) or stereo.
The Audio Type setting is only related to AAC Encoding. If you select AMR in the Encoder field,
this setting is not used. The Audio Type field provides you with a drop-down box, which includes
two choices, as follows:
Main – This format is the same as LC (above), but adds backward prediction.
Low Complexity (LC) – The simplest and most widely used and support AAC audio format.
NOTE: Depending on the player on which the resulting stream will be heard, either choice will use a
specific set of tools to encode the audio stream. You should make your choice based on the
requirement of the playback software or device. The most widely supported format is LC profile.
The Audio Encoder settings provide you with a drop-down box, which includes two choices, as
follows:
Cisco Digital Media Encoder 2000 User Guide 47
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