[FFmpeg-user] mpdecimate and setpts

[Chen Fisher]

Thanks Carl! That works.

On Mon, Feb 12, 2018 at 3:57 PM Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:

> 2018-02-12 7:57 GMT+01:00 Chen Fisher <chen.fisher at gmail.com>:
> > I'm using mpdecimate to remove similar frames:
> > ffmpeg -i in.mp4 -vf mpdecimate out.mp4
> >
> > But the ending result has the same number of frames as the original video
> > file (although smaller file size).
> >
> > When using mpdecimate with setpts, the ending result has indeed smaller
> > frame count and smaller file size than before.
> > BUT, it will also change the time and "skip" those similar frames. I'm
> > looking for a way to remove frames but still have the time as the
> original.
> > So the "duplicate" frame will actually be played for the duration of all
> > removed duplicate frames.
> >
> > ffmpeg -i in.mp4 -vf "mpdecimate,setpts=N/FRAME_RATE/TB" out.mp4
>
> You cannot combine mpdecimate and mov/mp4 output in a useful way
> because our mov/mp4 muxer only supports constant frame rate, this
> is a known limitation of FFmpeg.
> Try mkv.
>
> Carl Eugen
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