# Http live streaming , the PTS is error, so audio/video lost sync.

**URL:** <https://community.wowza.com/t/http-live-streaming-the-pts-is-error-so-audio-video-lost-sync/37484>\
**Category:** Wowza Streaming Engine\
**Created:** [October 23, 2011, 6:56pm UTC](https://community.wowza.com/t/http-live-streaming-the-pts-is-error-so-audio-video-lost-sync/37484 "2011-10-23T18:56:00Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![yan\_feng](https://avatars.discourse-cdn.com/v4/letter/y/e5b9ba/32.png) [@yan\_feng](https://community.wowza.com/u/yan_feng)\
**Post date:** [October 23, 2011, 6:56pm UTC](https://community.wowza.com/t/http-live-streaming-the-pts-is-error-so-audio-video-lost-sync/37484/1 "2011-10-23T18:56:00Z")

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The STB , it depend on the pts in PES header.

Recorded and analysed the ts,which is output by WOWZA. I can see much PTS error.

How to make the PTS correct.

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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:** [October 23, 2011, 10:13pm UTC](https://community.wowza.com/t/http-live-streaming-the-pts-is-error-so-audio-video-lost-sync/37484/2 "2011-10-23T22:13:40Z")

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We do not know of any PTS/DTS errors in our MPEG-TS stream. You would need to provide the specific output from the tool.

Charlie

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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:** [October 25, 2011, 1:23pm UTC](https://community.wowza.com/t/http-live-streaming-the-pts-is-error-so-audio-video-lost-sync/37484/3 "2011-10-25T13:23:57Z")

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(moved to ticket)

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<div class="post-metadata">

**Author:** ![yan\_feng](https://avatars.discourse-cdn.com/v4/letter/y/e5b9ba/32.png) [@yan\_feng](https://community.wowza.com/u/yan_feng)\
**Post date:** [October 24, 2011, 1:28am UTC](https://community.wowza.com/t/http-live-streaming-the-pts-is-error-so-audio-video-lost-sync/37484/4 "2011-10-24T01:28:50Z")

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> We do not know of any PTS/DTS errors in our MPEG-TS stream. You would need to provide the specific output from the tool.
> 
> Charlie

How to give you the recorded ts file.

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<div class="post-metadata">

**Author:** ![yan\_feng](https://avatars.discourse-cdn.com/v4/letter/y/e5b9ba/32.png) [@yan\_feng](https://community.wowza.com/u/yan_feng)\
**Post date:** [October 25, 2011, 3:06am UTC](https://community.wowza.com/t/http-live-streaming-the-pts-is-error-so-audio-video-lost-sync/37484/5 "2011-10-25T03:06:54Z")

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in Elecard, I can see many wrong PTS.

I list some below, please see the frame 4, frame 5.

1:DTS: 3424037816 PTS: 3424037826

2:DTS: 3424040786 PTS: 3424049786

3:DTS: 3424043756 PTS: 3424043756

4:DTS: 3424046816 PTS: -3655944275

5:DTS: 3424049786 PTS: -3655938335

In the stream the bit33 is 1, then in Elecard the pts is negative value.