[Bug 22136] Inband Storage for SPS/PPS in ISO BMFF

https://www.w3.org/Bugs/Public/show_bug.cgi?id=22136

--- Comment #10 from Jon Piesing (OIPF) <oipfjon@gmail.com> ---
(In reply to comment #9)
> This suggestion makes sense in principle, since it helps align MSE with
> MPEG-DASH.  The ISO-BMFF part 15 spec it references is still evolving
> though.  Our internal review of it suggests that the in-band elementary
> stream requirements are likely to change further.  If we require it in MSE,
> it will be difficult for implementations to support the requirement soon.
> 
> SPS/PPS in-band data would be used to adapt support for live content to
> changing layout parameters.  These are currently at least partially
> satisfied by packaging SPS/PPS data in avcn boxes within the video data. 
> The avcn implementation can and should be supported for MSE, though I don’t
> believe it requires additional specification language.

I was led to believe that inband SPS/PPS (i.e. 'avc3'/'avc4') was partly the
results of discussing a proposal to include 'avcn' in MPEG. Is the
specification for 'avcn' even suitable to reference? Even if it could be
referenced with a little flexibility, why would you do that when there's an
official MPEG solution to the same problem - 'avc3'/'avc4'?

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Received on Tuesday, 9 July 2013 06:17:25 UTC