# How to sync multiple incoming streams for output to multistream HLS?

**URL:** <https://community.wowza.com/t/how-to-sync-multiple-incoming-streams-for-output-to-multistream-hls/49014>\
**Category:** Wowza Streaming Engine\
**Created:** [June 19, 2017, 5:39pm UTC](https://community.wowza.com/t/how-to-sync-multiple-incoming-streams-for-output-to-multistream-hls/49014 "2017-06-19T17:39:19Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jummy\_hin](https://avatars.discourse-cdn.com/v4/letter/j/b5e925/32.png) [@jummy\_hin](https://community.wowza.com/u/jummy_hin)\
**Post date:** [June 19, 2017, 5:39pm UTC](https://community.wowza.com/t/how-to-sync-multiple-incoming-streams-for-output-to-multistream-hls/49014/1 "2017-06-19T17:39:19Z")

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Hello.

I need to send rtmp streams from multiple devices (video+audio) to one local wowza and switch they on client side. I pack this streams to multistream HLS. Devices are get synchroneus video+audio and send it by rtmp stream. But there streams are not synchroneus on wowza, one video+audio stream is late of other video+audio stream.

How can I sync multiple incoming streams for output to multistream HLS?

some update: in test player of each input stream in wowza I see sync difference is \< 1 sec. , but in HLS with video from stream1 and audio from stream2, synd difference is \> 10 sec. why it? how can I get syncroneus streams?

Alexey

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**Author:** ![aa\_aa2](https://avatars.discourse-cdn.com/v4/letter/a/58956e/32.png) [@aa\_aa2](https://community.wowza.com/u/aa_aa2)\
**Post date:** [January 19, 2018, 4:03pm UTC](https://community.wowza.com/t/how-to-sync-multiple-incoming-streams-for-output-to-multistream-hls/49014/2 "2018-01-19T16:03:31Z")

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Any updates on this?