# live stream time delay (http for ios)

**URL:** <https://community.wowza.com/t/live-stream-time-delay-http-for-ios/39388>\
**Category:** Wowza Streaming Engine\
**Created:** [January 21, 2013, 11:00pm UTC](https://community.wowza.com/t/live-stream-time-delay-http-for-ios/39388 "2013-01-21T23:00:56Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![xiao\_dong](https://avatars.discourse-cdn.com/v4/letter/x/ce7236/32.png) [@xiao\_dong](https://community.wowza.com/u/xiao_dong)\
**Post date:** [January 21, 2013, 11:00pm UTC](https://community.wowza.com/t/live-stream-time-delay-http-for-ios/39388/1 "2013-01-21T23:00:56Z")

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i play the live stream from wowza media server with rtsp ,there is 4s-8s delay, on my mobile device,while when i play the stream with http there is about 30s-50s delay,so what should i do to reduce the time delay when i play the stream on ios with http?

thanks!

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**Author:** ![jason\_pinto](https://avatars.discourse-cdn.com/v4/letter/j/df705f/32.png) [@jason\_pinto](https://community.wowza.com/u/jason_pinto)\
**Post date:** [January 22, 2013, 1:32am UTC](https://community.wowza.com/t/live-stream-time-delay-http-for-ios/39388/2 "2013-01-22T01:32:08Z")

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hi,

The delay is nothing but the buffer time. If you go through [wowza User guide](https://www.wowza.com/resources/WowzaMediaServer_UsersGuide.pdf) chapter 5 (Advance configuration Topics) you will see the following details:

> For HTTP Streamers such as Cupertino (Apple HLS), Smooth (Microsoft Smooth Streaming), and San Jose (Adobe HDS), the on-demand startup model doesn’t work. An iOS device requires about 30 seconds of video to be pre-packetized before it can begin playback. Microsoft Silverlight clients require three times the key frame duration. Therefore, it’s necessary to start the stream prior to the stream being ready for streaming to these player technologies

Hope it helps to clear your doubts

regards

Jason

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**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\
**Post date:** [January 22, 2013, 1:15pm UTC](https://community.wowza.com/t/live-stream-time-delay-http-for-ios/39388/3 "2013-01-22T13:15:17Z")

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Also, take a look at this guide:

[https://www.wowza.com/docs/how-to-configure-apple-hls-packetization-cupertinostreaming](https://www.wowza.com/docs/how-to-configure-apple-hls-packetization-cupertinostreaming)

Richard

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**Author:** ![xiao\_dong](https://avatars.discourse-cdn.com/v4/letter/x/ce7236/32.png) [@xiao\_dong](https://community.wowza.com/u/xiao_dong)\
**Post date:** [January 22, 2013, 5:15pm UTC](https://community.wowza.com/t/live-stream-time-delay-http-for-ios/39388/4 "2013-01-22T17:15:11Z")

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thanks!

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<div class="post-metadata">

**Author:** ![xiao\_dong](https://avatars.discourse-cdn.com/v4/letter/x/ce7236/32.png) [@xiao\_dong](https://community.wowza.com/u/xiao_dong)\
**Post date:** [January 22, 2013, 5:24pm UTC](https://community.wowza.com/t/live-stream-time-delay-http-for-ios/39388/5 "2013-01-22T17:24:00Z")

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is this still work on wowza 3.5?