[M4IF Technotes] MPEG-4 short video header conformance streams

[iole moccagatta]

Gary,
Gary Sullivan wrote:
> I believe this is a matter of whether the streams
> contain configuration information or are stand-alone
> elementary streams.  The spec describes both cases
> (configuration information contained "in-band" and
> "elementary stream only").
>

Thanks for pointing this out.
So now the question is: why one set of video conformance streams, namely
the short video header ones, do not start with video_object_start_code, as
do all the other ones ?
Best Regards,
    Iole
>
> Best Regards,
>
> -Gary
>
> +> -----Original Message-----
> +> From: iole moccagatta [mailto:imoccaga   lsil.com]
> +> Sent: Monday, June 24, 2023 2:54 PM
> +> To: m4if tech notes
> +> Cc: Iole Moccagatta
> +> Subject: [M4IF Technotes] MPEG-4 short video header
> +> conformance streams
> +>
> +>
> +>
> +> Dear All,
> +>
> +> I have one question concerning MPEG-4 short video header conformance
> +> streams.
> +>
> +> I have notice that the MPEG-4 short video header conformance streams
> +> start with "short_video_start_marker", while the other MPEG-4 video
> +> conformance streams start with "video_object_start_code".
> +>
> +> However, according to the MPEG-4 spec, the "short_video_start_marker"
> +> too should be preceded by a "video_object_start_code".
> +>
> +> I assume that the decision to start the two set of
> +> conformance streams
> +> at different level is just a practical one. Should I therefore assume
> +> that, in a real situation, the short video header stream should be
> +> preceded, among other things, by a video_object_start_code ?
> +>
> +> Please confirm.
> +>
> +> Best Regards,
> +>
> +>     Iole
> +>
> +> --

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=       Iole Moccagatta, Ph.D.                                               =
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