.m4a (AAC) confuses me

[sderenzi]

Why does this show "File Brand mp42" when it's really just audio? Shouldn't it be "File Brand M4A"?

 

* Movie Info *

Timescale 600 - Duration 00:04:37.988

Fragmented File no - 3 track(s)

File Brand mp42 - version 1

Created: GMT Fri Sep 28 04:49:07 2007

 

File has root IOD

Scene PL 0x01 - Graphics PL 0x01 - OD PL 0x01

Visual PL: No visual capability required (0xff)

Audio PL: AAC Profile @ Level 2 (0x29)

 

iTunes Info:

Name: Caught Up In You

Artist: .38 Special

Album: Anthology / .38 Special

Disk: 1 / 2

TrackNumber: 10 / 18

Group: v

Cover Art: JPEG File

 

Track # 1 Info - TrackID 101 - TimeScale 44100 - Duration 00:04:37.

Media Info: Language "Undetermined" - Type "soun:mp4a" - 11972 samp

MPEG-4 Config: Audio Stream - ObjectTypeIndication 0x40

MPEG-4 Audio AAC LC - 2 Channel(s) - SampleRate 44100

Synchronized on stream 1

 

Track # 2 Info - TrackID 2 - TimeScale 600 - Duration 00:00:01.000

Track is present in Root OD

Media Info: Language "Undetermined" - Type "odsm:mp4s" - 1 samples

MPEG-4 Config: ObjectDescriptor Stream - ObjectTypeIndication 0x01

Synchronized on stream 1

 

Track # 3 Info - TrackID 1 - TimeScale 600 - Duration 00:00:01.000

Track is present in Root OD

Media Info: Language "Undetermined" - Type "sdsm:mp4s" - 1 samples

MPEG-4 Config: SceneDescription Stream - ObjectTypeIndication 0x02

BIFS Scene description - Command stream