# Weird behavior with high bandwidth live stream.

**URL:** <https://community.wowza.com/t/weird-behavior-with-high-bandwidth-live-stream/46290>\
**Category:** Wowza Streaming Engine\
**Created:** [November 27, 2015, 5:25pm UTC](https://community.wowza.com/t/weird-behavior-with-high-bandwidth-live-stream/46290 "2015-11-27T17:25:18Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Stan\_Rehshetnyk](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/stan_rehshetnyk/32/1156_2.png) [@Stan\_Rehshetnyk](https://community.wowza.com/u/Stan_Rehshetnyk)\
**Post date:** [November 27, 2015, 5:25pm UTC](https://community.wowza.com/t/weird-behavior-with-high-bandwidth-live-stream/46290/1 "2015-11-27T17:25:18Z")

</div>

I’m working on webinar project which need screen sharing feature. We noticed that screen video stream works not well.

Details:

- latest Wowza 4.3.0 on Ubuntu 14.10 and good hardware;

- JUV RTMP java lib is used as publisher;

- Screen Video 2 codec without audio;

- Resolution 1920x1080 or 3840x2160;

- 5 fps and keyframe each 40 frame;

- stream upload bandwidth is 60 KBytes/sec minimal and 250-600 KBytes/sec on screen changes / keyframe.

Problem symptoms:

- stream has huge start time. More than 10 seconds to receive image back to publisher;

- stream used to increase lag (live delay) during working for several minutes. I measuring by enabling audio in separate stream and receiving both in other flash client;

- stream upload bandwidth sometimes looks limited but value varies 110…250 KBytes/sec when connected to wowza;

I found that my app works well with FMS /live application. While wowza /live application has described issues. FMS returns stream back almost immediately. They both installed on the same server. Wowza with license and FMS is trial.

Could you recommend which settings I should use to have Wowza to work similar to FMS?

Or do you have an idea what could went wrong with my app?

Thanks,

Stan