# Filter behavior on "openvidu-android"

**URL:** https://openvidu.discourse.group/t/filter-behavior-on-openvidu-android/2686
**Category:** Issues developing apps
**Tags:** v2
**Created:** [February 10, 2021, 10:51am UTC](https://openvidu.discourse.group/t/filter-behavior-on-openvidu-android/2686 "2021-02-10T10:51:56Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![adok](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@adok](https://openvidu.discourse.group/u/adok)
#### Post date: [February 10, 2021, 10:51am UTC](https://openvidu.discourse.group/t/filter-behavior-on-openvidu-android/2686/1 "2021-02-10T10:51:56Z")

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Hello

I’m trying to implement the filter feature in “openvidu-android” in “tutorials”.

I have set the following, but it does not work properly.

> public void publishVideo(SessionDescription sessionDescription) {  
> Map\<String, String\> publishVideoParams = new HashMap\<\>();  
> publishVideoParams.put(“audioActive”, “true”);  
> publishVideoParams.put(“videoActive”, “true”);  
> …  
> publishVideoParams.put(“filter”, “{"type":"GStreamerFilter","options":{"command":"videoflip method=vertical-flip"}}”); //\<-- add

Is there any other way?

Please help me, thank you.

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<div class="post-metadata">

### Author: ![adok](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@adok](https://openvidu.discourse.group/u/adok)
#### Post date: [April 1, 2021, 8:35am UTC](https://openvidu.discourse.group/t/filter-behavior-on-openvidu-android/2686/2 "2021-04-01T08:35:00Z")

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I haven’t solved it yet.  
help me…