4.2

The built-in settings included in the Prepare for HTTP Live
Streaming destination and the built-in AAC setting (for audio
output) use the MPEG-4 transcoding format, which encodes files
using an H.264 encoder. This format encodes files for HTTP live
streaming and for AAC audio files used in audio podcasting and
digital music playback. To learn more about HTTP Live Streaming,
see the and other related
documents available in the .
You can also create custom settings that use the MPEG-4
transcoding format.
The properties of built-in and custom settings that use the MPEG-
4 transcoding format are listed below. The list includes properties
in the General, Video, and Audio inspectors.
Important: When you add a setting (or a destination that includes
settings) to a job, Compressor analyzes the source media and
then automatically assigns the most appropriate setting properties
(based on the setting’s transcoding format and the characteristics
of your source media file). It’s recommended that you use the
automatically assigned setting properties.
Setting summary
Displays the setting name and transcoding format, as well as an
estimated output file size. When you add a setting to a job or
change the setting’s properties, this summary automatically
updates.
HTTP Live Streaming Overview
Mac Developer Library