Re: AAC Codec questions / compatibility with car players
Reply #14 – 2017-12-27 22:05:12
Here is the metadata from Sample_FhG_VBR4.m4a :* Movie Info * Timescale 44100 - 3 tracks Computed Duration 00:00:08.057 - Indicated Duration 00:00:08.057 Fragmented File: no File suitable for progressive download (moov before mdat) File Brand mp42 - version 0 Compatible brands: mp42 isom Created: GMT Wed Dec 27 20:46:56 2017 Modified: GMT Wed Dec 27 20:46:56 2017 File has root IOD (92 bytes) Scene PL 0xff - Graphics PL 0xff - OD PL 0xff Visual PL: No visual capability required (0xff) Audio PL: High Quality Audio Profile @ Level 2 (0x0f) Chapters: Chapter #1 - 00:00:00.036 - "Symphony No. 6 in F major, op. 68 (Beethoven): 1st Movement - Allegro ma non troppo, 1st part (Side 1)" iTunes Info: Name: Symphony No. 6 in F major, op. 68 (Beethoven): 1st Movement - Allegro ma non troppo, 1st part (Side 1) Artist: BBC Symphony Orchestra (Conductor: Arturo Toscanini) Album: Sample_FhG Comment: Gramophone DB 3333 (2ER 231) RCM and ELP Genre: Symphonies Encoder Software: fhgaac v03.02.16;VBR=4 3 UDTA types: hnti (1) meta (1) chpl (1) Track # 1 Info - TrackID 1 - TimeScale 44100 Media Duration 00:00:08.057 - Indicated Duration 00:00:08.057 Media Info: Language "Undetermined (und)" - Type "soun:mp4a" - 347 samples MPEG-4 Config: Audio Stream - ObjectTypeIndication 0x40 MPEG-4 Audio AAC LC - 2 Channel(s) - SampleRate 44100 Synchronized on stream 2 RFC6381 Codec Parameters: mp4a.40.2 All samples are sync Track # 2 Info - TrackID 2 - TimeScale 1000 Media Duration 00:00:08.057 - Indicated Duration 00:00:08.057 Track is present in Root OD Media Info: Language "Undetermined (und)" - Type "odsm:mp4s" - 1 samples MPEG-4 Config: ObjectDescriptor Stream - ObjectTypeIndication 0x01 Self-synchronized RFC6381 Codec Parameters: mp4s.01 All samples are sync Track # 3 Info - TrackID 3 - TimeScale 1000 Media Duration 00:00:08.057 - Indicated Duration 00:00:08.057 Track is present in Root OD Media Info: Language "Undetermined (und)" - Type "sdsm:mp4s" - 1 samples MPEG-4 Config: SceneDescription Stream - ObjectTypeIndication 0x02 BIFS Scene description - Command stream Synchronized on stream 2 RFC6381 Codec Parameters: mp4s.02 All samples are sync The other files don't have this sort of redundant metadata information, maybe this has something to do with it?. Although I'm not exacly an expert in MP4 metadata, etc. I can post the other metadata information, if requested.