[mythtv] transcoder documentation.

[Chris Petersen]

> > the second method can be used on already transcoded files, and only the
> > frames immediately following a cut section will be reencoded (thus there
> > is very minimal quality loss)
> is this true?   I've been waiting for this feature for a long time, but
> there's been no info in mythtranscoder about it - heck, mythtranscoder
> doesn't even tell me what format to give the starttime in.

ok, so mythtranscoder uses the myth time format:  YYYY-MM-DDTHH:MM:SS (T
being an actual letter T).

Anyway, I ran this, and it started transcoding.  and by the speed
(slow), I'm pretty sure it wasn't merely cutting things.

back to waiting for more info...

-Chris