[Matroska-devel] [proposal] add new element DefaultDeocdedFieldDuration

madshi madshi at gmail.com
Sat Dec 29 22:14:43 CET 2012


Hey,

> what I wanted to achieve is to have the word "frame" appear
> for progressive content, because that's what a lot of people
> usually will think about (and "interlaced" when they hear "field").
> Therefore your proposal looks fine to me. So the full long
> description would read as follows: [...]

LGTM now, thanks.

Best regards, Mathias.


2012/12/29 Moritz Bunkus <moritz at bunkus.org>

> Hey,
>
> what I wanted to achieve is to have the word "frame" appear for
> progressive content, because that's what a lot of people usually will
> think about (and "interlaced" when they hear "field"). Therefore your
> proposal looks fine to me. So the full long description would read as
> follows:
>
> ------------------------------------------------------------
> If the video sequence is signaled as interlaced, the period between
> two successive fields at the output of the decoding process equals
> DefaultDecodedFieldDuration. For video sequences signaled as
> progressive, DefaultDecodedFieldDuration is half of the period between
> two successive frames at the output of the decoding process.
>
> These values are valid at the end of the decoding process before
> post-processing like deinterlacing or inverse telecine is applied.
>
> Examples:
>
> (1) Blu-Ray movie: 1000000000ns/(48/1.001) = 20854167ns
> (2) PAL broadcast/DVD: 1000000000ns/(50/1.000) = 20000000ns
> (3) N/ATSC broadcast: 1000000000ns/(60/1.001) = 16683333ns
> (4) hard-telecined DVD: 1000000000ns/(60/1.001) = 16683333ns   (60
> encoded interlaced fields per second)
> (5) soft-telecined DVD: 1000000000ns/(60/1.001) = 16683333ns   (48
> encoded interlaced fields per second, with "repeat_first_field = 1")
> ------------------------------------------------------------
>
> Kind regards,
> mosu
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