[Matroska-devel] Mappings for HEVC/H.265 in Matroska

Hendrik Leppkes h.leppkes at gmail.com
Thu Jun 6 23:45:15 CEST 2013


On Thu, Jun 6, 2013 at 9:57 PM, Jason Braness
<Jason.Braness at rovicorp.com> wrote:
> On Thu, Jun 6, 2013 at 3:06 PM, Jan Ekstrom <jeebjp at gmail.com> wrote:
>
>
>
>> Also, I just quickly looked through DivX's short RFC for
>
>> HEVC-in-Matroska ( http://labs.divx.com/node/127907 ) , and in general
>
>> it looks good. Regarding the CodecPrivate, the number of possible VPS
>
>> at a given time seems to match (IDs 0-15 -> maximum of 16 different
>
>> ones), but I've not yet checked the maximum of amount of PPS/SPS at a
>
>> given time (their documented variable is a ue(v), which IIRC not
>
>> specified in output length). My random guess before checking would be
>
>> that 31 for SPS, and 255 for PPS should be enough, though.
>
>
>
> This is a good point.  We initially are just using the values the AVC
> CodecPrivate used to stay consistent.  We will have to confirm this is
> correct with the spec.
>
>

Since AVC/H264 simply copied the MP4 spec for the CodecPrivate, it
would seem sensible for HEVC to do the same, that way a player only
has to implement processing for one structure, and not MP4 and MKV
separately.


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