[FFmpeg-devel] eval lavfi filter

[Stefano Sabatini]

Hi.

On date Tuesday 2009-01-20 09:37:21 +0100, V?ctor Paesa encoded:
> There is also a problem for filters that remove frames, as ffmpeg
> uses/expects the fps of the input video (instead of the filtered one) and
> generates duplicated frames to reach that.
> 
> For example, if input.avi has 25fps, then output.avi will also have
> 25fps, despite the fps filter:
> 
> ffmpeg -i input.avi -vfilters 'fps=1' output.avi

Is not this the expected behaviour?

Especially since the fps filter output framerate may be variable.

In the above case the user migth do:

ffmpeg -i input.avi -vfilters 'fps=1' -r 1 output.avi

Regards.
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FFmpeg = Faboulous & Faithful Mythic Portentous Ephemeral Geisha