# Why do some mpeg dash segments have double the normal duration? **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [June 19, 2020, 7:43pm UTC](https://community.wowza.com/t/why-do-some-mpeg-dash-segments-have-double-the-normal-duration/55432 "2020-06-19T19:43:01Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Kevin\_Lee1](https://avatars.discourse-cdn.com/v4/letter/k/c68b51/32.png) [@Kevin\_Lee1](https://community.wowza.com/u/Kevin_Lee1)\ **Post date:** [June 19, 2020, 7:43pm UTC](https://community.wowza.com/t/why-do-some-mpeg-dash-segments-have-double-the-normal-duration/55432/1 "2020-06-19T19:43:01Z")
I am streaming from OBS Studio to Wowza Streaming Engine with a keyframe interval of 8 seconds, and I noticed that some of the segments in the dash manifest have a duration of 16 seconds, while most are 8 seconds. I want to understand why 16-second segments are created, rather than two 8-second segments. This happens on both live and on-demand streams. Typical video segments: Typical matching audio segments: Timescale is 90000 for both. Anyone have any ideas? ---
**Author:** ![Kevin\_Lee1](https://avatars.discourse-cdn.com/v4/letter/k/c68b51/32.png) [@Kevin\_Lee1](https://community.wowza.com/u/Kevin_Lee1)\ **Post date:** [June 22, 2020, 6:02pm UTC](https://community.wowza.com/t/why-do-some-mpeg-dash-segments-have-double-the-normal-duration/55432/2 "2020-06-22T18:02:18Z")
That worked much better. Thank you! ---
**Author:** ![Rose\_Power-Wowza\_Com](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/rose_power-wowza_com/32/431_2.png) [@Rose\_Power-Wowza\_Com](https://community.wowza.com/u/Rose_Power-Wowza_Com)\ **Post date:** [June 22, 2020, 4:29pm UTC](https://community.wowza.com/t/why-do-some-mpeg-dash-segments-have-double-the-normal-duration/55432/3 "2020-06-22T16:29:36Z")
We would not recommend a keyframe of 8 seconds and suggest you always do 4 seconds or lower. Can you try to make that adjustment and see if that fixes things?