# VOD HLS Buffering and cupertinoChunkDurationTarget
**URL:** https://community.wowza.com/t/vod-hls-buffering-and-cupertinochunkdurationtarget/53653
**Category:** Wowza Streaming Engine
**Created:** [July 13, 2019, 2:19pm UTC](https://community.wowza.com/t/vod-hls-buffering-and-cupertinochunkdurationtarget/53653 "2019-07-13T14:19:05Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Michael\_Doble](https://community.wowza.com/u/Michael_Doble)
#### Post date: [July 13, 2019, 2:19pm UTC](https://community.wowza.com/t/vod-hls-buffering-and-cupertinochunkdurationtarget/53653/1 "2019-07-13T14:19:05Z")
I’ve got a 15 second video that has a keyframe interval of 2. I’ve set my cupertinoChunkDurationTarget setting to 6000. The video takes a hot second to load (using Clappr for playback) and when it does, the video gets to the 6 second mark, buffers for a second or two, then loads the rest of the video. How do I stop this buffering from happening?
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### Author:  [@Michael\_Doble](https://community.wowza.com/u/Michael_Doble)
#### Post date: [July 15, 2019, 6:01pm UTC](https://community.wowza.com/t/vod-hls-buffering-and-cupertinochunkdurationtarget/53653/2 "2019-07-15T18:01:59Z")
Bump. Any help?
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### Author:  [@Rose\_Power-Wowza\_Com](https://community.wowza.com/u/Rose_Power-Wowza_Com)
#### Post date: [July 15, 2019, 6:07pm UTC](https://community.wowza.com/t/vod-hls-buffering-and-cupertinochunkdurationtarget/53653/3 "2019-07-15T18:07:40Z")
What you can change @Michael Doble is the ChunkDurationTarget from 6000 seconds to 2000 milliseconds. The player requires at least 3 chunks at 2 seconds each so this this means the lowest you can get it down for initial playback is a total of 6 seconds ( 3 chunks X 2 seconds each).
Try that and see if that helps. Here is the tutorial on how to change all the Cupertino settings:
[https://www.wowza.com/blog/changing-default-segment-size-decrease-streaming-latency](https://www.wowza.com/blog/changing-default-segment-size-decrease-streaming-latency)
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### Author:  [@Michael\_Doble](https://community.wowza.com/u/Michael_Doble)
#### Post date: [July 16, 2019, 12:54pm UTC](https://community.wowza.com/t/vod-hls-buffering-and-cupertinochunkdurationtarget/53653/4 "2019-07-16T12:54:58Z")
I’ve adjusted that setting but the problem remains where the video gets to the 2 second mark and then buffers for a second to load the next 2 seconds of the video. Is this player related (Clappr) or is it a setting in Wowza somewhere? It just seems like only 2 seconds of the video loads at a time.
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### Author:  [@Michael\_Doble](https://community.wowza.com/u/Michael_Doble)
#### Post date: [July 16, 2019, 1:16pm UTC](https://community.wowza.com/t/vod-hls-buffering-and-cupertinochunkdurationtarget/53653/5 "2019-07-16T13:16:12Z")
Nevermind. I’ve adjusted some of my encoding settings and it seems to be loading normal now. Thanks.