[Matroska-devel] [proposal] new Matroska element CueDuration

Steve Lhomme slhomme at matroska.org
Sat Sep 15 15:52:33 CEST 2012


That seems to be a correct solution to that problem. Anyone disagrees ?

On Fri, Sep 14, 2012 at 9:08 AM, Moritz Bunkus <moritz at bunkus.org> wrote:
> Hey,
>
> I propose to add the following new Matroska element:
>
> CueDuration, child of CuePoint (therefore sibling of CueTime)
> - not mandatory
> - not multiple
> - unsigned integer
> - no default value
> - ID 0x53 b3
>
> Description: "The duration of the block according to the segment time
> base. If missing the track's DefaultDuration does not apply and no
> duration information is available wrt. the cues."
>
> Rationale: Often after seeking to timecode T users wish to see the
> subtitles that should be shown at that particular moment T. However,
> this is not possible for a splitter without seeking to a point well
> before the actual seek point T, reading all elements and finding a
> subtitle frame that might still be displayed at T. With the proposed
> change a muxer could include all subtitle blocks and their duration in
> the cues and a splitter would have all the information required to
> display the subtitles directly after seeking.
>
> Kind regards,
> mosu
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-- 
Steve Lhomme
Matroska association Chairman


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