[FFmpeg-user] What is the (technical) difference between -r and the fps filter?

[Christian Ebert]

* Werner Robitza on Friday, April 19, 2013 at 17:06:38 +0200
>> That is correct, please use -vf fps
>> See also ticket #1578
> 
> Thanks Carl Eugen.
> 
> However the question still remains: what's the actual difference between
> the filter and -r?
> Is it generally not recommended to use the latter at all? Seems all over
> the place in many examples…

Or is the message that -r or -r:v is deprecated? Or in the
process of being deprecated?

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