# Smooth Streaming Chunk Duration Target
**URL:** https://community.wowza.com/t/smooth-streaming-chunk-duration-target/46221
**Category:** Wowza Streaming Engine
**Created:** [November 25, 2015, 8:36pm UTC](https://community.wowza.com/t/smooth-streaming-chunk-duration-target/46221 "2015-11-25T20:36:26Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@Tomonori\_Maruyama](https://community.wowza.com/u/Tomonori_Maruyama)
#### Post date: [November 25, 2015, 8:36pm UTC](https://community.wowza.com/t/smooth-streaming-chunk-duration-target/46221/1 "2015-11-25T20:36:26Z")
Hello Wowza,
Is the smooth streaming chunk duration configurable like a mpegdashChunkDurationTarget?
I tried to set “smoothChunkDurationTarget” to 2000 and mp4 GOP to 1 sec as a factor of the chunk duration. But the result chunk size seems to be only 1 sec, not twice the size of GOP.
Best regards,
Tomonori
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### Author:  [@Daren\_Johnson](https://community.wowza.com/u/Daren_Johnson)
#### Post date: [November 30, 2015, 11:58pm UTC](https://community.wowza.com/t/smooth-streaming-chunk-duration-target/46221/2 "2015-11-30T23:58:22Z")
Hi,
Yes, but the property names are different. The following guide lists the properties used for [SmoothStreaming Packetization.](https://www.wowza.com/docs/how-to-configure-microsoft-smooth-streaming-packetization-smoothstreaming%28smoothstreaming%29)
The one you are interested in is **smoothManifestTargetDuration.**
Daren
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### Author:  [@Robert\_Reinhardt](https://community.wowza.com/u/Robert_Reinhardt)
#### Post date: [January 27, 2016, 5:41pm UTC](https://community.wowza.com/t/smooth-streaming-chunk-duration-target/46221/3 "2016-01-27T17:41:45Z")
I don’t typically utilize Smooth Streaming for VOD playback, but I have a client who’s targeting a setup box that supports DRM over Smooth Streaming only. I haven’t enabled DRM on the test stream, but the GoP size is 2 seconds and the video playback shows artifacting and reports errors in the log. VLC can’t play the stream “smoothly” either, but a variety of desktop browser-based Silverlight players have no issues playing the stream.
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### Author:  [@Daren\_Johnson](https://community.wowza.com/u/Daren_Johnson)
#### Post date: [January 13, 2016, 12:08am UTC](https://community.wowza.com/t/smooth-streaming-chunk-duration-target/46221/4 "2016-01-13T00:08:49Z")
Hi,
There really isn’t a equivalent for VOD smooth streaming. What is the intended result?
With Smooth streaming it’s important to keep the Keyframe interval down to 4 seconds or below,
with 2 seconds being more preferable. So encoded files to be played in Smooth Streaming players
should adhere to this.
Daren
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### Author:  [@Tomonori\_Maruyama](https://community.wowza.com/u/Tomonori_Maruyama)
#### Post date: [December 8, 2015, 6:18pm UTC](https://community.wowza.com/t/smooth-streaming-chunk-duration-target/46221/5 "2015-12-08T18:18:29Z")
Hello Daren,
I would like to configure VOD chunk duration, not Live.
I tried to add the smoothManifestTargetDuration property to the / and also to the / like the mpegdash. But the both did not affect to VOD streams.
Would you let me know how to configure smoothManifestTargetDuration for VOD?
Best regards,
Tomonori
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### Author:  [@Tomonori\_Maruyama](https://community.wowza.com/u/Tomonori_Maruyama)
#### Post date: [January 14, 2016, 7:21pm UTC](https://community.wowza.com/t/smooth-streaming-chunk-duration-target/46221/6 "2016-01-14T19:21:25Z")
Thank you Daren,
We had tested keyframe interval 1 second and 2 seconds. And found another problem at 1 second with non-PC device.
So, we choose 2 seconds for keyframe interval. Then the smooth streaming chunk size also be 2 seconds that I indended.
Tomonori
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### Author:  [@Jason\_Hatchett](https://community.wowza.com/u/Jason_Hatchett)
#### Post date: [May 2, 2016, 4:15am UTC](https://community.wowza.com/t/smooth-streaming-chunk-duration-target/46221/7 "2016-05-02T04:15:46Z")
Hello,
Can you post examples of the errors in the log that you are seeing?
Regards,
Jason Hatchett