# WebRTC through Wowza on iOS makes the video freeze **URL:** \ **Category:** Wowza Streaming Engine\ **Tags:** webrtc\ **Created:** [April 10, 2018, 2:35pm UTC](https://community.wowza.com/t/webrtc-through-wowza-on-ios-makes-the-video-freeze/51115 "2018-04-10T14:35:52Z")\ **Posts on this page:** 1\ **Showing post:** 1
**Author:** ![Jim\_Grimshaw](https://avatars.discourse-cdn.com/v4/letter/j/b5a626/32.png) [@Jim\_Grimshaw](https://community.wowza.com/u/Jim_Grimshaw)\ **Post date:** [April 10, 2018, 2:35pm UTC](https://community.wowza.com/t/webrtc-through-wowza-on-ios-makes-the-video-freeze/51115/1 "2018-04-10T14:35:52Z")
When going peer to peer with the appr.tc example everything seams to work well. However, my current setup is Chrome \<-\> Wowza \<-\> iOS Safari. The video freezes in the safari webbrowser after some time. On that iOS device I can still hear the audio, but the video is frozen. On the Chrome side I can both see and hear the other side. So in Wowza, all streams are ok. If I run the same setup with Chrome \<-\> Wowza \<-\> Desktop Safari or Chrome \<-\> Wowza \<-\> Chrome (Desktop or Android) I don’t see this issue. So it looks like a iOS Safari issue. It also appears to trigger this freeze bug more easily when there is a lot of movement in the video, eg when the resolution changes due to limited bandwidth or maybe other h264 parameters. I tried this with both UDP and TCP and give the same results. I also tried different css styles in the hope to have it rendered differently as described here: [https://bugs.webkit.org/show\_bug.cgi?id=176439](https://bugs.webkit.org/show_bug.cgi?id=176439) I am using h264 with profile id 42e01f, to be the same as appr.tc and Tried to run the chrome side on Windows, Ubuntu and Mac, all with the same results. I also filed this bug with Webkit: [https://bugs.webkit.org/show\_bug.cgi?id=175014](https://bugs.webkit.org/show_bug.cgi?id=175014) --- _[View the full topic](https://community.wowza.com/t/webrtc-through-wowza-on-ios-makes-the-video-freeze/51115)._