[MPlayer-users] divtc filter

[Corey Hickey]

Peter Gavin wrote:
> Hi,
> 
> I've got an anime that I'm experimenting with different filters etc.
> to try to get the best quality.  The dvd is in NTSC telecline format.
> I have a question concerning divtc.
> 
> Is the divtc filter meant to be used in place of ivtc/pullup?  I don't
> understand if it actually does the inverse telecline, or if its meant
> to be used in combination with an ivtc filter, and just picks the
> correct frame to drop (instead of leaving it to softskip).  If I do:
> 
> mencoder dvd://7 -vf pullup,divtc=pass=1,softskip -oac copy -ovc copy
> -o /dev/null -ofps 24000/1001
> 
> followed by the same but with pass=2, mencoder still gives me lots of
> "Skipping frame!" messages.  I guess this means that softskip is doing
> its job.  But it also means that divtc isn't dropping frames.  (unless
> divtc is making the "Skipping frame!" messages instead..)
> 
> mplayer.1 isn't too clear on when divtc should be used (at least to
> me, anyways).  The first sentence in the divtc description is "Inverse
> telecine for deinterlaced video."  Does that mean, "divtc is an
> inverse telecline filter that should be applied to deinterlaced
> video"?  Or does it mean "divtc is an ivtc filter that produces
> deinterlaced video"?  I'm lost. :)

The former. I've never used divtc, so somebody may correct me if I'm
wrong, but as far as I know it's only to be used for video that somebody
already screwed up by deinterlacing where they should have
inverse-telecined.

> One other question... if -vf pullup,softskip is giving me some
> combing/mouse teeth in a few frames of the output, am I doing
> something wrong?  Or should I just stick a deinterlacing filter on
> there and forget about it?

You can try using -vf filmdint instead. It deinterlaces automatically in
parts where it can't inverse-telecine properly.

-Corey