[MPlayer-dev-eng] deinterlacing, filters, etc.

D Richard Felker III dalias at aerifal.cx
Mon Mar 22 16:34:22 CET 2004

On Mon, Mar 22, 2004 at 03:07:18PM +0100, Oswald Buddenhagen wrote:
> moin,
> i'm using mencoder as the core for a video recorder app. i have a few
> questions/observations:
> first, i'm wondering, what the correct order of denoising and
> deinterlacing is? i found that files are smaller (and encoding is
> a bit slower) when i denoise after deinterlacing. i don't see a
> visual difference ...

Denoising before deinterlacing doesn't really make sense, unless you
split fields and do it a field at a time. Even then it won't be as
effective as denoising after deinterlacing.

> second, i found that the linear blend deinterlacer has an interesting
> side effect ... due to the implicit vertical blurring it removes PAL
> color coding artifacts. i'm wondering, whether there is another filter
> that has only this effect? if not, would it be within reasonable effort
> to write one?

The easiest way would be to just apply linear-blend filter to the
chroma planes only...


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