# To set up thumbnail seeking in Bitmovin Player

**URL:** <https://community.bitmovin.com/t/to-set-up-thumbnail-seeking-in-bitmovin-player/1054>\
**Category:** Support\
**Tags:** bitmovin-player, webvtt\
**Created:** [July 25, 2022, 11:37am UTC](https://community.bitmovin.com/t/to-set-up-thumbnail-seeking-in-bitmovin-player/1054 "2022-07-25T11:37:09Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![billpay](https://avatars.discourse-cdn.com/v4/letter/b/eb9ed0/32.png) [@billpay](https://community.bitmovin.com/u/billpay)\
**Post date:** [July 25, 2022, 11:37am UTC](https://community.bitmovin.com/t/to-set-up-thumbnail-seeking-in-bitmovin-player/1054/1 "2022-07-25T11:37:09Z")

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Hi,  
I’m using Bitmovin player. In order to show the thumbnail image on seek-bar, I’ve to generate VTT(Video Text Tracks) file from .mp4. Do we’ve documentation to generate it through the Nodejs client?  
Thanks in advance.

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**Author:** ![matheus.cardoso](https://avatars.discourse-cdn.com/v4/letter/m/3bc359/32.png) [@matheus.cardoso](https://community.bitmovin.com/u/matheus.cardoso)\
**Post date:** [July 27, 2022, 6:54pm UTC](https://community.bitmovin.com/t/to-set-up-thumbnail-seeking-in-bitmovin-player/1054/2 "2022-07-27T18:54:31Z")

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Hi! Thanks for your question. How are you encoding your mp4 file? Our encoder can generate thumbnails as part of the encoding process. Depending on whether you’re using it, the instructions may be different.