[M4IF Technotes] File Format Version indication?

[Richard Shields]

Chris,
Thanks for making this clear.
-Richard
> -----Original Message-----
> From: Christopher Wendt [mailto:chris   avipix.com]
> Sent: Wednesday, July 11, 2023 11:28 AM
> To: Richard Shields; technotes   lists.m4if.org
> Subject: Re: [M4IF Technotes] File Format Version indication?
> 
> 
> Hi Richard, all,
> 
> Right, ftyp is mandatory for v2,  a file without ftyp is by 
> default v1.
> 
> -Chris
> 
> ----- Original Message -----
> From: "Richard Shields" <richard   sorenson.com>
> To: "Christopher Wendt" <chris   avipix.com>; <technotes   lists.m4if.org>
> Sent: Wednesday, July 11, 2023 1:24 PM
> Subject: RE: [M4IF Technotes] File Format Version indication?
> 
> 
> > Hi Chris, all,
> >
> > Well, my question was prompted by a question to me about 
> 'ftyp'.  'ftyp'
> > seems to be the information I'm looking for: an indicator 
> that signals
> which
> > version the file conforms to.  Is that the correct 
> understanding for it's
> > use?  Just to make sure I thought I would check to see if 
> there wasn't
> > anything else in the file that signaled the version.
> >
> > The document titled "MP4 version 2 (systems amendment 3) 
> working draft"
> > (w3850.doc) indicates that 'ftyp' is mandatory.  Shouldn't 
> it state that
> > it's optional?  If it's not there then a player should 
> assume version 1
> > otherwise consider the version indicated in the 'ftyp' 
> atom.  Would that
> be
> > appropriate behavior?
> >
> > -Richard
> >
> > > -----Original Message-----
> > > From: Christopher Wendt [mailto:chris   avipix.com]
> > > Sent: Wednesday, July 11, 2023 10:59 AM
> > > To: Richard Shields; technotes   lists.m4if.org
> > > Subject: Re: [M4IF Technotes] File Format Version indication?
> > >
> > >
> > > Hi Richard, all,
> > >
> > > Right now, there is only one version, although version 2 is
> > > on it's way.  A
> > > common problem is the updating of files to correct for the
> > > changes in COR1
> > > to the old spec.  Is that what you mean?
> > >
> > > -Chris
> > >
> > > -------------------------------------------------------------
> > > Christopher Wendt, avipix, llc
> > > chris   avipix.com
> > > (732) 682-5549
> > > http://www.avipix.com
> > >
> > > ----- Original Message -----
> > > From: "Richard Shields" <richard   sorenson.com>
> > > To: <technotes   lists.m4if.org>
> > > Sent: Wednesday, July 11, 2023 12:30 PM
> > > Subject: [M4IF Technotes] File Format Version indication?
> > >
> > >
> > > > Is there any information in the file format that indicates
> > > what version of
> > > > 14496-1 it complies with?
> > > >
> > > > Thanks,
> > > > Richard
> > > >
> > > > _______________________________________________
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> > > > Technotes   lists.m4if.org
> > > > http://lists.m4if.org/mailman/listinfo/technotes
> > > >
> > >
> >
>