[Matroska-devel] [Cellar] ReferenceTimecode tracks in Matroska proposal

Steve Lhomme slhomme at matroska.org
Thu Jan 14 13:30:42 CET 2016


2016-01-11 19:12 GMT+01:00 Michael Bradshaw <mjbshaw at google.com>:
> On Sun, Jan 10, 2016 at 2:57 PM, Dave Rice <dave at dericed.com> wrote:
>>
>> Hi all,
>>
>> Here is an early draft of Elements for managing ReferenceTimecode tracks.
>> Matroska uses the term 'Timecode' to reference presentation timestamps,
>> whereas other formats (QuickTime, MXF) use 'Timecode' to reference a time
>> reference that is added to the timeline which is inpendent of the
>> presentation (i.e. a QuickTime file with a timecode track that starts at one
>> hour aka 1:00:00;00 would not cause a one hour delay before playback
>> starts). In the context of Matroska I am using ReferenceTimecode (for now)
>> to refer to QuickTime/MXF style timecode tracks.
>
>
> Will the current timecode elements (TimecodeScale, Timecode,
> ReferenceTimeCode, TrackTimecodeScale, and block's Timecode) be renamed to
> "timestamp" or "presentation timestamp" (or something like that)? I hope so.

Definitely, yes.

> I know this is tangential to your post, but I want to get a "big picture" in
> my mind of where this is going to end up. I'm also slightly concerned that
> using the name "ReferenceTimecode"  will be a bit confusing to developers,
> given the old ReferenceTimeCode (DivX trick track extensions) element.
>
> --Michael
>
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-- 
Steve Lhomme
Matroska association Chairman


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