[M4IF Technotes] osdm handler

[Dave Singer]

At 17:52 +0800 7/3/03, Trevor NG wrote:
>Hi Harald and all,
>
>Thanks for your help. Refer to 14496-14 (Page 8~9), it seems the syntax for
>all video, audio and systems are the same. Could you suggest me for more
>detailed information?
>
>aligned(8) class ESDBox extends FullBox('esds', version = 0, 0) {
>     ES_Descriptor ES;
>}
>// Visual Streams
>class MP4VisualSampleEntry() extends VisualSampleEntry ('mp4v'){
>     ESDBox ES;
>}
>// Audio Streams
>class MP4AudioSampleEntry() extends AudioSampleEntry ('mp4a'){
>     ESDBox ES;
>}
>// all other Mpeg stream types
>class MpegSampleEntry() extends SampleEntry ('mp4s'){
>     ESDBox ES;
>}
>
>Thanks,
>Trevor

I'm not sure what more you need to know.  What are you having trouble deciding?
>
>----- Original Message -----
>From: "Harald Fuchs" <fuchs   iis.fhg.de>
>To: "Trevor NG" <trevor   astri.org>; "[M4IF Technotes]"
><technotes   lists.m4if.org>
>Sent: Thursday, July 03, 2023 4:53 PM
>Subject: Re: [M4IF Technotes] osdm handler
>
>
>>  On Thursday 03 July 2023 04:01, Trevor NG wrote:
>>  > Hi experts,
>>  >
>>  > Referring to 14496-12 FDIS, the syntax elements
>>  > for "mdia.minf.stbl.stsd" with handler_type "vide"
>>  > and "soun" are clearly defined. But I can't find
>>  > any syntax elements for handler_type "osdm". Could
>>  > anyone here give me some hints that I can follow
>>  > to decode the "mdia.minf.stbl.stsd" atom.
>>  >
>>  > Thanks in advance,
>>  > Trevor
>>
>>
>>  Hello Trevor,
>>
>>  14496-12 is the "ISO Media Fileformat". This document describes the basic
>>  elements of the fileformat. The ISO fileformat is not used directly, only
>>  derived versions (MP4, Motion-JPEG2000, 3GPP) are used.
>>
>>  In case of MP4: the MPEG-4 specific additions to the ISO base fileformat
>are
>>  described in 14496-14. "osdm" (ObjectDescriptorStream) is an MPEG-4
>element,
>>  so you have to look into 14496-14 for it.
>>
>>  Regards,
>>  Harald
>>
>>
>>  --
>>  -------------------------------------------------------------
>>   Harald Fuchs Fraunhofer IIS
>>   email:  fuchs   iis.fhg.de    Department Studio
>>   phone:  +49-9131-776-382 Am Wolfsmantel 33
>>   fax  :  +49-9131-776-399 D-91058 Erlangen (Germany)
>>  =============================================================
>>
>>
>>
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-- 
David Singer
Apple Computer/QuickTime