# Temporal Interpolator Filter Removes Time Steps

**URL:** https://discourse.paraview.org/t/temporal-interpolator-filter-removes-time-steps/6768
**Category:** ParaView Support
**Created:** [March 22, 2021, 9:36pm UTC](https://discourse.paraview.org/t/temporal-interpolator-filter-removes-time-steps/6768 "2021-03-22T21:36:24Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![R.B](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/r/a9adbd/32.png) [@R.B](https://discourse.paraview.org/u/R.B)
#### Post date: [March 22, 2021, 9:36pm UTC](https://discourse.paraview.org/t/temporal-interpolator-filter-removes-time-steps/6768/1 "2021-03-22T21:36:24Z")

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Hello,

I’m have a time variant data set that I want to apply Temporal Interpolator Filter on to make it smoother. When I apply the filter the time steps get removed from the ParaView time bar.  
I want to be able to save each frame as an individual image.

Here is a screen shot before applying the filter:

 ![Screen Shot 2021-03-22 at 2.24.01 PM](https://discourse.paraview.org/uploads/default/original/2X/9/96c19bff39e5ffd832df953c277461a97262a268.png)

And here is how it looks after applying the filter:  
 ![Screen Shot 2021-03-22 at 2.24.24 PM](https://discourse.paraview.org/uploads/default/original/2X/6/6fb77a380c1ed232f81d3681217c5141c687bce2.png)

1. Is there a way to tell paraview to double the original time steps to reflect the interpolation impact?
2. And is there a way to save one image per time step?

I tried applying the extract time steps filter after the Interpolator filter but it shows the range to be 0 to -1.

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### Author: ![utkarsh.ayachit](https://discourse.paraview.org/user_avatar/discourse.paraview.org/utkarsh.ayachit/32/39_2.png) [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)
#### Post date: [March 23, 2021, 12:11am UTC](https://discourse.paraview.org/t/temporal-interpolator-filter-removes-time-steps/6768/2 "2021-03-23T00:11:55Z")

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Simple use the Animation View to set the number of timesteps you need.

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### Author: ![Kenneth\_Moreland](https://discourse.paraview.org/user_avatar/discourse.paraview.org/kenneth_moreland/32/15033_2.png) [@Kenneth\_Moreland](https://discourse.paraview.org/u/Kenneth_Moreland)
#### Post date: [March 23, 2021, 1:15pm UTC](https://discourse.paraview.org/t/temporal-interpolator-filter-removes-time-steps/6768/3 "2021-03-23T13:15:51Z")

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Here are a couple of other solutions.

- Update to ParaView 5.9. There is an update to `Temporal Interpolator` that preserves the timesteps. There is an option to the `Temporal Interpolator` named `Resample Factor` to set how many new timesteps to interpolate after each original timestep. Set it to `2` to double the number of timesteps.
- In versions pre ParaView 5.9, try setting the `Discrete Time Step Interval` option of `Temporal Interpolator`. If set greater than `0`, the `Temporal Interpolator` will create a time step at those intervals per simulation time. For example, in the `can.ex2` example data set, the simulation has created time steps at about every 1e-4 seconds. You can set `Discrete Time Step Interval` to half that (`5e-5`) to double the number of timesteps.