[FFmpeg-user] aac encoder delay management

[Vincent Jousse - Les Canaux Discrets]

Does ffmpeg permits to manage the aac encoder delay in another way than 
assuming a fixed arbitrary delay ? I need to encode files with ffmpeg 
that will be well "understood" by Apple tools.
Here are more information about encoder delay: 
http://developer.apple.com/library/mac/#documentation/QuickTime/qtff/QTFFAppenG/QTFFAppenG.html

Thanks for your help