Hello
I want to know the packaging of .m4a encoded data i.e. how samples of one frame and corresponding scalefactors information is package in .m4a file format.
Thanks
soman N

The AAC data is stored normally, but there is no header. Decoder configuration information is stored in a special place. Each 'sample' in the mp4 file contains one frame of AAC.

The file format and AAC codec format are too complicated to explain in a forum post. Information about the MP4 file format can be found in MPEG-4 Part 12 and 14. Information about the AAC codec can be found in MPEG-4 Part 3. These documents may be purchased from ISO.