[Vorbis-dev] Enhanced Podcasts with Ogg Vorbis (Chapter Marks)

[Silvia Pfeiffer]

On Tue, Jan 17, 2012 at 9:14 PM,  <xiphmont at xiph.org> wrote:
>> Would it be possible to add a recommendation for chapter marks on a xiph
>> page (e.g. at [1], [2] or similar) ?
>> Then it should be much easier to ask players for support ...
>>
>>
>> My suggestion would be:
>>
>> CHAPTER MARKS
>>
>> Chapter marks allow you to navigate through chapters while listening to
>> podcasts (enhanced podcasts), audiobooks and other long audio files.
>>
>> This format consists of pairs of comment fields that start with 'CHAPTERxx='
>> and 'CHAPTERxxNAME=' respectively. The first one contains the start timecode
>> (hh:mm:ss.mmm) while the second one contains the title.
>>
>> Here's an example:
>>  CHAPTER01=00:00:00.000
>>  CHAPTER01NAME=Intro
>>  CHAPTER02=00:02:30.000
>>  CHAPTER02NAME=Baby prepares to rock
>>  CHAPTER03=00:02:42.300
>>  CHAPTER03NAME=Baby rocks the house
>>  ...
>>
>> The same format is used as input by mkvmerge ('simple chapter format', see
>> [3]) and by ogmmerge [4] (input for ogmmerge [5], output of dvdxchap [6]).
>
> OK, given/assuming this is already a reasonably widely deployed way of
> doing it, I agree.
>
> Anyone have any last comments before I add it?

This is easy enough to map to WebVTT and thus to the way that chapters
work in the current HTML5 spec. We have hierarchical chapters there,
too, btw, so maybe that needs to be taken into account. Otherwise I
have no issues with this.

Cheers,
Silvia.