[M4IF Technotes] osdm handler

[Trevor NG]

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
----- 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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