[M4IF Technotes] one simple question

[Chandra Sekhar Reddy G]

hi,
i am also interested in an answer to this.
the problem Wo talking about is for the observation.
the problem i am talking about is for the material itself.
in fact, there are many counters in (eg. sub-atoms in SampleTableAtom) MP4
File Format,
some start with '0' and some start with '1' (was it the way in QuickTime
FileFormat also?).
eg. in SampleToChunkAtom, in many MP4 files, the chunk numbers start with
'1', some MP4 files start chunk numbers from '0'.
that is the way the data is encoded in the table in SampleToChunkAtom.
i have seen some mp4 files using counters starting from '0', some mp4 files
starting from '1' for the same counters.
Should the standard address this?
Chandra
----- Original Message -----
From: Wo Chang <wchang   nist.gov>
To: <technotes   lists.m4if.org>
Sent: Friday, February 01, 2024 12:58 AM
Subject: [M4IF Technotes] one simple question
> Dear All,
>
> One simple question:
>
> When counting frame in MPEG-1/-2/-4 video clip,
> do we (MPEG'ers) use "0" or "1" base when counting
> the very first frame?  I came across materials using
> "1" as the starting frame but that may not be the
> MPEG's convention.
>
> The reason why I asked this is, let's say you have
> a group of collaborators reviewing shots.  We will
> need to establish what is the first frame called:
> frame 0 or frame 1, so that at a later time, if we
> say "look at frame 928", then we all will look at
> the exact frame.
>
> I just want to know, how do MPEG'ers normally count
> the frame, do you count the very first frame as frame "0"
> or frame "1".
>
> Thanks!
>
> --Wo
>
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