[M4IF Technotes] osdm handler

[Trevor NG]

Hi Dave and all,
For VisualSampleEntry, there is a syntax as follows (extracted from 14496-12
P26)
    // Visual Sequences
    class VisualSampleEntry(codingname) extends SampleEntry (codingname){
            unsigned int(16) pre_defined = 0;
            const unsigned int(16) reserved = 0;
            unsigned int(32)[3] pre_defined = 0;
            unsigned int(16) width;
            unsigned int(16) height;
            template unsigned int(32) horizresolution = 0x00480000; // 72
dpi
            template unsigned int(32) vertresolution = 0x00480000; // 72 dpi
            const unsigned int(32) reserved = 0;
            template unsigned int(16) frame_count = 1;
            string[32] compressorname;
            template unsigned int(16) depth = 0x0018;
            int(16) pre_defined = -1;
    }
Is there any similar syntax for SampleEntry of "osdm"?
Thanks,
Trevor
----- Original Message ----- 
From: "Dave Singer" <singer   apple.com>
To: "Trevor NG" <trevor   astri.org>; "[M4IF Technotes]"
<technotes   lists.m4if.org>
Sent: Friday, July 04, 2023 12:49 AM
Subject: Re: [M4IF Technotes] osdm handler
> 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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> >
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>
> -- 
> David Singer
> Apple Computer/QuickTime
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