---
title: ZEC Set Preroll
slug: zixi-broadcaster-v18/zec-set-preroll
docTags: 
createdAt: 2024-12-26T19:56:44.122Z
---

A preroll transport stream file is a video/audio file that is played before the adaptive group video is played. Before setting the preroll, you should make sure that the file is available for VOD and that VOD is enabled in the File Transfer and VOD settings. 

**To set a Pre-roll:**

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Upload the Pre-roll TS File to the designated Root folder on the ZEC server. To find your Root folder location, go to **Settings > General**. The Root path is specified in the **Root Folder** field. 

::Image[]{src="https://api.archbee.com/api/optimize/mzxtTQEvCNIdUNgF2kuwJ/t5T8cIo0t5Hjb7zeGi2qN_image.png" size="66" width="786" height="160" position="center" alt="Root Path" showCaption="false"}
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In the **Settings > File Transfer & VOD** screen, select the VOD checkbox.

::Image[]{src="https://api.archbee.com/api/optimize/mzxtTQEvCNIdUNgF2kuwJ/YPVe18e9Ckikxzl1pLaqO_image.png" size="80" width="808" height="165" position="center" alt="Select VOD" showCaption="false"}
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In the ZEC **Adaptive Groups** screen, click the desired adaptive group for which you want to add the preroll.
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Click the **Action** button on the selected row and then click **Set Preroll**.
The following window is displayed:

::Image[]{src="https://api.archbee.com/api/optimize/mzxtTQEvCNIdUNgF2kuwJ/msBDczaBPtCmhtIjYrm4P_image.png" size="60" width="564" height="290" position="center" alt="Preroll File Selection" showCaption="false"}
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In the **Group ID** field, select the adaptive group for which you want to add the preroll.
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In the **Preroll File** field, click the **Browse** button and select the desired file.
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Click **OK**.
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