how to speed up the video?

[xyzDist]

I have no idea how to control the speed of final video?
I want the video faster, but no matter I tried all the paramter just doesn't work for me.
what is the suggestion?

[xyzDist]

I figured it was the smoothing/interpolate function causing it, as long as I turn off, it respect the fps, and is the expected speed I after.
is that a bug?

[AlUlkesh]

No, interpolation is just more complicated...

Here I needed to calculate a "pts" (presentation timestamp).

The formula is pts = seconds / fps. Since pts has to be at least 1, everything <1 is set to 1.

That means that seconds has to be > fps to have an effect.

Another factor is, how many images there are to works with, that would be the "steps" number.

I suggest you try different values for those 3 parameters with this im mind.