Talk:Apple AAC

From Hydrogenaudio Knowledgebase
Jump to: navigation, search

This is the talk page for discussing changes to the Apple AAC article.

  • Please do not use it as a forum for general discussion about the article's subject. Use the forums instead.
  • Please read the wiki policy before editing.
  • Sign and date your posts using two dashes and four tildes (--~~~~).
  • Place new comments after existing ones (but within topic sections).
  • Separate topic sections with a ==Descriptive header==.
  • Feel free to use these smilies by embedding their codes:
    Smiley--).png {{smiley|)}} Smiley--D.png {{smiley|D}} Smiley--(.png {{smiley|(}} Smiley--;.png {{smiley|;}}

Page discussion

Encoder bandwith and low pass filters

Just as in Fraunhofer encoder wiki, it's advisable to know apple encoder's default lowpass filters with bitrates, to be able to change defaults with --lowpass command option. Low pass filters is important to ascertain how the encoder chooses to omit high frequency information.

FFmpeg with AudioToolbox

In recent versions of FFmpeg on OS X it is possible to use the Apple encoders via AudioToolbox. AAC encoder is called aac_at. Unlike afconvert, it preserves metadata when encoding.