[MEncoder-users] Apply filter when encoding DV avi file to xvid

[Grozdan Nikolov (openSUSE Linux)]

On Sunday 27 January 2008 18:10, Cédric MARCOUX (sprimont) wrote:
> Hi James,
>
> thanks for answer however do you mean that I have to encode in three pass?
> First with filter
> Second xvid pass1 without audio process
> Third xvid pass2

no, he meant that deinterlacing filters should come before cropping and 
scaling. 

>
> Thanks,
>
> Cédric MARCOUX
>
> James Hastings-Trew a écrit :
> > Cédric MARCOUX (sprimont) wrote:
> >> Hi all!
> >>
> >> i'm using dvgrab to capture movie from my CamCorder DV
> >> I'm using mencoder to convert to xvid.
> >> I have noticed that avi created with dvgrab is good quality but when
> >> motion move I have some artifact (entrelaced line) and this not
> >> beautifull.
> >>
> >> So I was wondering if there a way to apply a filter when encoding my dv
> >> file to xvid?
> >
> > You need to apply a de-interlace filter. This should be done as a first
> > filtering step (i.e. before any cropping or scaling). You can try a
> > simple linear blend (slightly softer image result): -vf pp=lb, or you
> > can try a fancier deinterlacer that tries to only affect the
> > "interlaced" parts of the image: -vf  yadif=0, or you can try an even
> > fancier one: -vf yadif=3,mcdeint.
> >
> > Personally I use the linear blend - it's fast and gets the job done. I
> > often throw a little unsharp mask on the end of the filter chain to
> > compensate a bit for the softening effect.
> >
> > Grozdan Nikolov helpfully provided this link in a recent post:
> >> Here's a comparison of deinterlacers. In the end there's no perfect
> >> deinterlacer, they all have their strong and weak points.
> >>
> >> http://guru.multimedia.cx/deinterlacing-filters/
>
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