[theora] Add an intro to a theora file without re-encoding?

[ogg.k.ogg.k at googlemail.com]

> Now, I want to cut it to 6 seconds (that's the duration of my video intro):
> oggCut -i silence.ogg -o silence6s.ogg -e 6000
>
> However, the new file is shorter than 6s! (see
> http://free-electrons.com/issues/oggcat-jul17-2009/silence6s.ogg)

Try vcut, from vorbis-tools. I suspect oggCut would be cutting
at page boundaries, vcut can cut at sample granularity.