# Lip Sync issue - Cisco telepresence content server **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [July 24, 2015, 5:19pm UTC](https://community.wowza.com/t/lip-sync-issue-cisco-telepresence-content-server/45722 "2015-07-24T17:19:54Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Jagatheesh\_kumar](https://avatars.discourse-cdn.com/v4/letter/j/bbce88/32.png) [@Jagatheesh\_kumar](https://community.wowza.com/u/Jagatheesh_kumar)\ **Post date:** [July 24, 2015, 5:19pm UTC](https://community.wowza.com/t/lip-sync-issue-cisco-telepresence-content-server/45722/1 "2015-07-24T17:19:54Z")
We are using cisco telepresence content server 6.2 . Flash content is streamed live from Cisco TCS to wowza … then it is published to CDN network . Voice and video doesnt sync . video is faster than voice. I tried sort buffer and packetisation as specified in the forum but i couldnt resolve the issue . Let me know if Sort buffer - 250/750 /2500 - tried them all 2015-07-24 00:01:43 IST comment server INFO 200 - PushPublishRTMP.sendPackets[rtmp://hidden]: send: count:1181378 tc(a/v/d):15576632/15576627/15576483 seq:1181449/1181449 - - - 36986.319 - - - - - - - - - - - - - - - - - - - - - - - - - 2015-07-24 00:01:43 IST comment server INFO 200 - PushPublishRTMP.sendPackets[rtmp://hidden]: send: count:1181534 tc(a/v/d):15577144/15577127/15576483 seq:1181608/1181608 - - - 36986.819 - - - - - - - - - - - - - - - - - - - - - - - - - > [@Lip Sync Issue during LiveStreaming](http://community.wowza.com/t/-/39345): > > Hello - We run WOWZA Media Server 3 on a 64-bit Windows 2008 R2 high-end server. We use One (1) Encoder from Cisco called the Cisco TelePresence Content Server (TCS). TCS Unicasts to WOWZA using (RTMP / H.264) and WOWZA then Livestream’s it on Multicasts to VLC Client Players using RTP over RTSP / H.264. We are faced with is a Lip Sycn issue during Live Streaming and the issue occurence is very random. In our case, the Audio plays out first before the Video. Whenever we face the issue, we hard-… ---
**Author:** ![Jagatheesh\_kumar](https://avatars.discourse-cdn.com/v4/letter/j/bbce88/32.png) [@Jagatheesh\_kumar](https://community.wowza.com/u/Jagatheesh_kumar)\ **Post date:** [July 24, 2015, 5:56pm UTC](https://community.wowza.com/t/lip-sync-issue-cisco-telepresence-content-server/45722/2 "2015-07-24T17:56:13Z")
> We are using cisco telepresence content server 6.2 . Flash content is streamed live from Cisco TCS to wowza … then it is published to CDN network . > > Voice and video doesnt sync . video is faster than voice. > > I tried sort buffer and packetisation as specified in the forum but i couldnt resolve the issue . Let me know if > > Sort buffer - 250/750 /2500 - tried them all > > 2015-07-24 00:01:43 IST comment server INFO 200 - PushPublishRTMP.sendPackets[rtmp://hidden]: send: count:1181378 tc(a/v/d):15576632/15576627/15576483 seq:1181449/1181449 - - - 36986.319 - - - - - - - - - - - - - - - - - - - - - - - - - > > 2015-07-24 00:01:43 IST comment server INFO 200 - PushPublishRTMP.sendPackets[rtmp://hidden]: send: count:1181534 tc(a/v/d):15577144/15577127/15576483 seq:1181608/1181608 - - - 36986.819 - - - - - - - - - - - - - - - - - - - - - - - - - > > [Lip Sync Issue during LiveStreaming](http://community.wowza.com/t/-/39345) Video is fine for first 2 hours and lip sync occurs beyond that time . Also am not sure if this is tc(0) or tc(1)… tc(a/v/d):15576632/15576627/15576483 ---
**Author:** ![Jagatheesh\_kumar](https://avatars.discourse-cdn.com/v4/letter/j/bbce88/32.png) [@Jagatheesh\_kumar](https://community.wowza.com/u/Jagatheesh_kumar)\ **Post date:** [September 4, 2015, 12:46pm UTC](https://community.wowza.com/t/lip-sync-issue-cisco-telepresence-content-server/45722/3 "2015-09-04T12:46:01Z")
Hi, How to make the Keyframe Constant in wowza . We are using transcoder add on . each encode in Transcoder has the following settings Key Frame Interval Use key frame interval of: 60 frames per second We wanted to make this constant . Akamai specifies the keyframe varies drastically . ---
**Author:** ![Jagatheesh\_kumar](https://avatars.discourse-cdn.com/v4/letter/j/bbce88/32.png) [@Jagatheesh\_kumar](https://community.wowza.com/u/Jagatheesh_kumar)\ **Post date:** [September 4, 2015, 1:06pm UTC](https://community.wowza.com/t/lip-sync-issue-cisco-telepresence-content-server/45722/4 "2015-09-04T13:06:14Z")
anyone ?