[FFmpeg-user] filter for changing frame rate

[Carl Eugen Hoyos]

Am Mo., 13. Mai 2019 um 14:03 Uhr schrieb Jon bae <jonbae77 at gmail.com>:
>
> Am Mo., 13. Mai 2019 um 13:41 Uhr schrieb Paul B Mahol <onemda at gmail.com>:
>
> > On 5/13/19, Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
> > > Am Mo., 13. Mai 2019 um 13:25 Uhr schrieb Jon bae <jonbae77 at gmail.com>:
> > >>
> > >> Hello everybody,
> > >> I have videos with 23.97 fps and I want to change the fps to 25. For
> > this
> > >> I
> > >> don't want to use fps or framerate filter, but changing the pts with:
> > >> setpts=1/1.0427093760427095*PTS
> > >>
> > >> If I do this I have to define also the output frame rate with the -r
> > >> command. But I would like to change the frame rate with an video filter,
> > >> after setting the pts.
> > >
> > > What's wrong with using the fps filter?
> > > In some cases, dejudder could also help.
> > >
> >
> > fps filter duplicates/drops frames, dejudder is specific filter for
> > specific usecase.
> >
> > Yes the is right, I don't want any dropping or interpolating. Just setting
> a new fps. But when this is not possible with filters, I have to use the -r
> option.

Or the fps filter.
This filter and the r option have different algorithms that have advantages
(and disadvantages) in different situations.

Carl Eugen