# Revert time series

**URL:** https://discourse.paraview.org/t/revert-time-series/1210
**Category:** ParaView Support
**Created:** [January 31, 2019, 6:27am UTC](https://discourse.paraview.org/t/revert-time-series/1210 "2019-01-31T06:27:17Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![rbeucher](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/r/e495f1/32.png) [@rbeucher](https://discourse.paraview.org/u/rbeucher)
#### Post date: [January 31, 2019, 6:27am UTC](https://discourse.paraview.org/t/revert-time-series/1210/1 "2019-01-31T06:27:18Z")

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Hi All,

Is it possible to revert the frame order so that the animation starts at the end and goes back in time?  
I would like to seed tracers at the end of a simulation and see where they have originated from.  
So it is not just a visualisation thing but would be used for post processing…  
I can revert the velocity field but I also need to revert the frame or dataset order…

Thanks!

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### Author: ![cory.quammen](https://discourse.paraview.org/user_avatar/discourse.paraview.org/cory.quammen/32/11193_2.png) [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [January 31, 2019, 1:48pm UTC](https://discourse.paraview.org/t/revert-time-series/1210/2 "2019-01-31T13:48:33Z")

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There is not a way I can think of. But that’s not a bad idea.

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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: [January 31, 2019, 3:10pm UTC](https://discourse.paraview.org/t/revert-time-series/1210/3 "2019-01-31T15:10:25Z")

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One option is to apply the **Temporal Shift Scale** filter with **Scale** set to `-1`. Now when you hit `Play`, the timeseries will be iterated in reverse order

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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: [January 31, 2019, 4:16pm UTC](https://discourse.paraview.org/t/revert-time-series/1210/4 "2019-01-31T16:16:30Z")

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You can go to the `Animation View` (menu `View` -\> `Animation View`) a double-click on the `TimeKeeper` bar. That will pop up a dialog box that will allow you to change the time value passed to the pipeline objects. By default, it is set to `Animation Time` (that is, the pipeline objects get the same time as the animation time). You can change that to `Variable Time` to set up some custom interpolations of time. Once you click the `Variable Time` radio button, click `New` to create your initial keyframes, and set the values to go from the end time to the start time.

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### Author: ![rbeucher](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/r/e495f1/32.png) [@rbeucher](https://discourse.paraview.org/u/rbeucher)
#### Post date: [February 1, 2019, 4:23am UTC](https://discourse.paraview.org/t/revert-time-series/1210/5 "2019-02-01T04:23:26Z")

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Thanks for the suggestions. I am going to give it a try.