profile
You can only choose an audio profile when you specify AAC for the value of Audio:Codec.
Specify the AAC profile for the output file. Elastic Transcoder supports the following profiles:
auto
: If you specifyauto
, Elastic Transcoder selects the profile based on the bit rate selected for the output file.AAC-LC
: The most common AAC profile. Use for bit rates larger than 64 kbps.HE-AAC
: Not supported on some older players and devices. Use for bit rates between 40 and 80 kbps.HE-AACv2
: Not supported on some players and devices. Use for bit rates less than 48 kbps.
All outputs in a Smooth
playlist must have the same value for Profile
.
If you created any presets before AAC profiles were added, Elastic Transcoder automatically updated your presets to use AAC-LC. You can change the value as required.