[M4IF Technotes] Regarding MPEG4 video in 3GPP file format

[Franceschini Guido]

For your convenience, here is a table of Profiles and Levels that I believe are accepted in 3GPP, ISMA Profile0 and ISMA Profile1.
I have compiled this table. If anybody identifies a mistake please let me know.
includeInlineProfilesFlag 0    // 0x00 3GPP ISMA0 ISMA1
ODProfileLevelIndication 255    // 0xFF 3GPP ISMA0 ISMA1
sceneProfileLevelIndication 255    // 0xFF 3GPP ISMA0 ISMA1
graphicsProfileLevelIndication 255    // 0xFF 3GPP ISMA0 ISMA1
audioProfileLevelIndication 15 // 0x0F High Quality Audio Profile L2     ISMA0 ISMA1 (not sure about 3GPP' AAC)
audioProfileLevelIndication 254 // 0xFE not specified (e.g. AMR for 3GPP)
audioProfileLevelIndication 255 // 0xFF No Audio
visualProfileLevelIndication 8 // 0x8  SP   L0 3GPP ISMA0 ISMA1
visualProfileLevelIndication 1 // 0x1  SP   L1      ISMA0 ISMA1
visualProfileLevelIndication 2 // 0x2  SP   L2            ISMA1
visualProfileLevelIndication 3 // 0x3  SP   L3            ISMA1
visualProfileLevelIndication 240 // 0xF0  ASP   L0           ISMA1
visualProfileLevelIndication 241 // 0xF1  ASP   L1           ISMA1
visualProfileLevelIndication 242 // 0xF2  ASP   L2           ISMA1
visualProfileLevelIndication 243 // 0xF3  ASP   L3           ISMA1
visualProfileLevelIndication 247 // 0xF7  ASP   L3b          ISMA1
visualProfileLevelIndication 254 // 0xFE not specified (e.g. H263 for 3GPP)
visualProfileLevelIndication 255 // 0xFF No Video
Best regards
Guido
-----Original Message-----
From: Mody, Mihir [mailto:mihir   ti.com]
Sent: Friday, June 06, 2023 3:21 PM
To: 'technotes   lists.m4if.org'
Subject: [M4IF Technotes] Regarding MPEG4 video in 3GPP file format
Hi, 
I created 3GPP movie file using Apple's Quicktime 6.3 Pro. In  'DecodeSpecificInfo'  for MPEG4 video,  for 'profile_and_level_indication'  field it writes reserve word (0x08).  Ideally this field should 
be 0x01 indicating simple profile and level 1 for MPEG4 video. The file does not contain IODs.  How does decoder can find profile and level information in this case? Can it always assume
simple profile L1 stream? 
PS:  Also in case of Quicktime 6.0 Pro, it was writing 0xfe(reserve word) as 'profile_and_level_indication'  in MP4 files.
Regards, 
Mihir Mody 
Imaging and Audio Group, 
Texas Instruments Inc. 
Bangalore -India  
Email: mihir   ti.com 
Phone: +91-80-5099307 
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