# Smoothstreaming packetizer property - why have to add

**URL:** <https://community.wowza.com/t/smoothstreaming-packetizer-property-why-have-to-add/41933>\
**Category:** Wowza Streaming Engine\
**Created:** [March 7, 2014, 8:57am UTC](https://community.wowza.com/t/smoothstreaming-packetizer-property-why-have-to-add/41933 "2014-03-07T08:57:04Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Mark\_Shueard](https://avatars.discourse-cdn.com/v4/letter/m/49beb7/32.png) [@Mark\_Shueard](https://community.wowza.com/u/Mark_Shueard)\
**Post date:** [March 7, 2014, 8:57am UTC](https://community.wowza.com/t/smoothstreaming-packetizer-property-why-have-to-add/41933/1 "2014-03-07T08:57:04Z")

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I read that for Live Streaming Smoothstreaming content we have to add this

smoothPacketSortTime

500

Integer

smoothAlignAudioWithVideo

true

Boolean

Indeed this solved issues I was having. I just don’t understand why it is not included by default. Why must I add it to the xml every time I create a new live application based on Smooth?

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**Author:** ![sal\_jefferson](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@sal\_jefferson](https://community.wowza.com/u/sal_jefferson)\
**Post date:** [March 10, 2014, 8:22am UTC](https://community.wowza.com/t/smoothstreaming-packetizer-property-why-have-to-add/41933/2 "2014-03-10T08:22:53Z")

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These properties are intended to help remedy source stream quality issues and inconsistencies, and when enabled add a latency increase (500 = 1/2 second increase). Most of the time they are not needed.

Salvadore

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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:** [March 12, 2014, 2:13pm UTC](https://community.wowza.com/t/smoothstreaming-packetizer-property-why-have-to-add/41933/3 "2014-03-12T14:13:26Z")

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Maybe this guidance should be better explained and positioned. I will open a discussion internally.

Thanks,

Richard

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**Author:** ![Mark\_Shueard](https://avatars.discourse-cdn.com/v4/letter/m/49beb7/32.png) [@Mark\_Shueard](https://community.wowza.com/u/Mark_Shueard)\
**Post date:** [March 12, 2014, 8:07am UTC](https://community.wowza.com/t/smoothstreaming-packetizer-property-why-have-to-add/41933/4 "2014-03-12T08:07:46Z")

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Thank you for your reply but I don’t understand it.

Why does the page suggest it is very important but you say it is not? [https://www.wowza.com/docs/how-to-turn-on-alignment-for-live-microsoft-smooth-streaming-smoothstreaming](https://www.wowza.com/docs/how-to-turn-on-alignment-for-live-microsoft-smooth-streaming-smoothstreaming)

As mentioned, it made a big difference to me and now I have to add each time I create new live Smooth application

What kind of poor quality source streams do you mean, do you mean latency or quality of audio or what exactly? If I am not doing source encode right I would like to know.

Thanks