# Enable WebRTC with VP9 Codec

**URL:** <https://community.wowza.com/t/enable-webrtc-with-vp9-codec/92170>\
**Category:** Wowza Streaming Engine\
**Tags:** webrtc\
**Created:** [October 20, 2020, 3:54am UTC](https://community.wowza.com/t/enable-webrtc-with-vp9-codec/92170 "2020-10-20T03:54:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jesper\_lai](https://avatars.discourse-cdn.com/v4/letter/j/e480ec/32.png) [@jesper\_lai](https://community.wowza.com/u/jesper_lai)\
**Post date:** [October 20, 2020, 3:54am UTC](https://community.wowza.com/t/enable-webrtc-with-vp9-codec/92170/1 "2020-10-20T03:54:30Z")

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i’m using [WebRTC Publishing Test for Wowza Streaming Engine](https://www.wowza.com/developer/webrtc/dev-view-publish) to POC webRTC on wowza  
there’s some options under VIdeo codes that I can choose, including H264, VP8, VP9

 ![image](https://us1.discourse-cdn.com/flex002/uploads/wowza1/original/1X/1ae923e748378cfafae8113045061643afe0aa35.png)

for H264 & VP8 codec, can successfully publish and play  
but while choosing VP9, an error msg pop-up

> Failed to set remote answer sdp: Failed to set remote video description send parameters for m-section with mid=‘1’

May I know how to correctly enable VP9 on webRTC?

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**Author:** ![video\_streaming](https://avatars.discourse-cdn.com/v4/letter/v/22d042/32.png) [@video\_streaming](https://community.wowza.com/u/video_streaming)\
**Post date:** [October 20, 2020, 4:23pm UTC](https://community.wowza.com/t/enable-webrtc-with-vp9-codec/92170/2 "2020-10-20T16:23:17Z")

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> [@jesper\_lai](#):
>
> May I know how to correctly enable VP9 on webRTC?

Would you please share with us what you are using?

- encoder
- codec
- browser and version  
  

VP9 works across a lot of platforms, but not all work so well Do you have Opus as the audio codec with the vp9?

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<div class="post-metadata">

**Author:** ![jesper\_lai](https://avatars.discourse-cdn.com/v4/letter/j/e480ec/32.png) [@jesper\_lai](https://community.wowza.com/u/jesper_lai)\
**Post date:** [October 26, 2020, 8:33am UTC](https://community.wowza.com/t/enable-webrtc-with-vp9-codec/92170/3 "2020-10-26T08:33:46Z")

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encoder  
= the website provided by Wowza itself ([https://www.wowza.com/developer/webrtc/dev-view-publish](https://www.wowza.com/developer/webrtc/dev-view-publish)), I just allow webpage to use the webcam

codec  
= VP9, there’s no issues on using VP8 and H.264, while choosing VP9, pop-up Failed to set remote answer sdp

audio codex = Opus as well, i always choose Opus as audio codec no matter what video codes I am using

brower  
= Chrome (version 86.0.4240.111)

Yes, always use Opus as audio codec no matter what video codec I was using, never change to another audio codec