[MPlayer-dev-eng] Dropping duplicate frames

Zoltan Hidvegi mplayer at hzoli.2y.net
Fri Dec 12 19:11:02 CET 2003

> > >> 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,

Actually, try -vf filmdint with -ofps 23.976, that should be better
than decimate.  Tell me if it does not work well of if you see any
qualidy degradation, although I probably won't answer in December
since I'll be traveling to Hungary, and my e-mail access will be less


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