[MPlayer-users] deinterlace+horiz scale

[Jan Knutar]

On Saturday 05 June 2004 05:44, Mikhail Ramendik wrote:
> Hello,
>
> In mencoder, I want to do *interpolating* deinterlacing (pp=li or
> pp=ci) *and* horizontal-only scaling (720x576->768x576).
>
> I want to do it in realtime, and compared to "-vf
> pp=li,scale=768:576" need just about 2-3 extra fps, so optimization
> is important.
>
> The optimal algorhitm would probably be, drop one field, then enlarge
> the result to 768x576. But I could not find the video filter for
> "drop one field". Is one available?

Maybe

       field[=n]
              Extracts a single field from an interlaced  image  using  stride
              arithmetic  to  avoid wasting CPU time.  The optional argument n
              specifies whether to extract the even or the odd field  (depend-
              ing on whether n is even or odd).

Is what you want?