[gst-devel] oggdemux push seek support

[Jay L. T. Cornwall]

Hi David,

>> The Ogg format is inherently difficult to seek because the stream 
>> headers (intentionally, by virtue of its streaming-oriented design) do 
>> not provide enough information to do this and its codecs are typically 
>> VBR. In pull mode, oggdemux performs a bisection search of the stream to 
>> identify chains (Ogg files concatenated together) and to compute the 
>> total stream length, among other things. This process is too seek 
>> intensive for push mode and so the demuxer currently has no seek support 
>> in push mode.

> You'll probably want to read this and related stuff to find out
> what efforts are being done in the area:
> 
>   http://pearce.org.nz/labels/ogg.html

Well, I'll be.

I investigated the Skeleton metadata track during my research and it 
didn't appear to offer anything useful to this problem. That was 3.0 - 
3.1 seems to add everything I need!

Thanks for that, I'll have a play with the prerelease tools and put 
together an alpha patch for gstoggdemux.c to parse and use the 
prerelease metadata. That's a much better solution, as it will easy to 
append a metadata track to existing Ogg files.

-- 
Jay L. T. Cornwall
http://www.jcornwall.me.uk/