# Gstreamer lip sync issues

**URL:** <https://community.wowza.com/t/gstreamer-lip-sync-issues/33547>\
**Category:** Wowza Streaming Engine\
**Created:** [February 18, 2010, 4:25pm UTC](https://community.wowza.com/t/gstreamer-lip-sync-issues/33547 "2010-02-18T16:25:58Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Charlie\_Good](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/charlie_good/32/383_2.png) [@Charlie\_Good](https://community.wowza.com/u/Charlie_Good)\
**Post date:** [February 19, 2010, 8:47am UTC](https://community.wowza.com/t/gstreamer-lip-sync-issues/33547/2 "2010-02-19T08:47:29Z")

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I know that people have reported lip sync issues with streams coming from different encoders. The streams will playback fine in VLC directly or even RTSP/RTP through Wowza to VLC but in Flash the lip sync is off. We have not determined what causes the issue. A few things that could contribute:

- Be sure you have set a NetStream.setBufferTime(secs) value in your player of between 2-5 seconds. If you are using one of our example players for playback you are OK.

- See step#1 of this forum post:

- Try turning off B-frames.

- Be sure the stream has a consistent frame rate (some encoders will change the frame rate on the fly)

- Try the new Flash player 10.1 beta 2. They have updated the H.264 decoder

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_[View the full topic](https://community.wowza.com/t/gstreamer-lip-sync-issues/33547)._