This is done without breaking W6132 Annex YYYY draft MP3onMP4 which also uses AOT 29.
Samples:
http://samples.mplayerhq.hu/A-codecs/AAC/aacPlusDecoderCheckPackage_v2.1/bitstreams/File7.3gp
http://samples.mplayerhq.hu/MPEG-4/mp3on4/id5_1.mp4


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@22281 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b