# vp9 on safari ios

**URL:** <https://mediasoup.discourse.group/t/vp9-on-safari-ios/5594>\
**Category:** mediasoup libraries\
**Created:** [October 19, 2023, 11:15am UTC](https://mediasoup.discourse.group/t/vp9-on-safari-ios/5594 "2023-10-19T11:15:38Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Itachi](https://avatars.discourse-cdn.com/v4/letter/i/bc79bd/32.png) [@Itachi](https://mediasoup.discourse.group/u/Itachi)\
**Post date:** [October 19, 2023, 11:15am UTC](https://mediasoup.discourse.group/t/vp9-on-safari-ios/5594/1 "2023-10-19T11:15:38Z")

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Hi all. I’m trying to support vp9, on Chrome, it works fine, but when I go to Safari via iPhone, it gives the error desired VP9 codec+configuration is not supported. But I checked the demo version, it works fine, I added the parameter forceVP9=true. what am I doing wrong? I added VP9 to the media server and even put it first after audio/opus I don’t know what to do, please help

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The screenshot below shows that I get VP9 through Chrome Windows. But when I open it through Safari it gets VP9 with getRouterRtpCapabilities but after mediasoupDevice.load it loses it. As far as I know, iOS Safari has support for VP9 at the WebRTC level. (["vp9" | Can I use... Support tables for HTML5, CSS3, etc](https://caniuse.com/?search=vp9)). Should I somehow indicate that this is a WebRTC application or how I don’t understand  
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