[MPlayer-dev-eng] Dropping duplicate frames

[Zoltan Hidvegi]

> >> after using mencoder for awhile I came across movies with (real)
> >> 29.97 fps which were created from a 24 fps source by inserting a
> >> duplicate frame after every 4th frame. When (re)encoding these movies it
> >> would be clever to drop these duplicated frames to save bandwidth and to
> >> eliminate the jerky motion artefacts.
> 
> >> But to only use the option '-ofps 23.976' is not satisfactory because
> >> mencoder bluntly drops every 5th frame regardless of being duplicates
> >> or not; or missed I something?
> 
> >isn't -vop dint the same? afair it was written for the same purpose.
> 
>     Nope. -vop dint doesn't drop frames by any count and cannot detect
> duplicate frames - it drops frame only if the frame is interlaced more
> than some threshold value. It has nothing to do with frame count nor with
> duplicates.

Try -vf decimate,

Zoli