FFmpeg 1.1.16
Since* 0.11
#

Convert the video to specified constant framerate by duplicating or dropping frames as necessary.

This filter accepts the following named parameters:

fps

Desired output framerate. The default is 25.

round

Rounding method.

Possible values are:

zero

zero round towards 0

inf

round away from 0

down

round towards -infinity

up

round towards +infinity

near

round to nearest

The default is near.

Alternatively, the options can be specified as a flat string: fps[:round].

See also the setpts filter.