Hello, I am using mod_conference on Freeswitch from today's master branch (1.5.12b+git~20140404T014312Z~5320075df7~64bit) on CentOS 6.5. We have a conference that consists of only two participants. The problem occurs when the floor changes. We get one of two scenarios: 1) We see the transmitted video image showing, what I can only describe as, the new speaker superimposed on the previous speaker. 2) The transmitted video image has so many artefacts it is unintelligible. After a couple of minutes it sorts itself out and we get the current speaker only. Looking at the FreeSWITCH log we see the PLI being sent: 2014-04-04 15:33:01.525217 [ALERT] mod_conference.c:2021 Adding video floor sofia/external/xxx@gmail.com 2014-04-04 15:33:01.525217 [ALERT] switch_core_session.c:2993 sofia/external/xxx@gmail.com receive message [VIDEO_REFRESH_REQ] 2014-04-04 15:33:01.525217 [ALERT] switch_core_session.c:2993 sofia/external/xxx@gmail.com receive message [VIDEO_REFRESH_REQ] 2014-04-04 15:33:01.525217 [ALERT] switch_core_session.c:2993 sofia/external/xxx@gmail.com receive message [VIDEO_REFRESH_REQ] 2014-04-04 15:33:01.525217 [ALERT] mod_conference.c:2093 Dropping floor sofia/external/xxx@gmail.com 2014-04-04 15:33:01.525217 [ALERT] mod_conference.c:2101 Adding floor sofia/external/xxx@gmail.com 2014-04-04 15:33:01.525217 [ALERT] switch_core_session.c:2993 sofia/external/xxx@gmail.com receive message [VIDEO_REFRESH_REQ] 2014-04-04 15:33:01.525217 [ALERT] switch_core_media.c:1650 sofia/external/xxx@gmail.com is already being read for video 2014-04-04 15:33:01.565149 [ALERT] switch_rtp.c:1540 Sending RTCP PLI 2014-04-04 15:33:01.565149 [ALERT] switch_rtp.c:1540 Sending RTCP PLI 2014-04-04 15:33:01.867523 [ALERT] switch_rtp.c:1540 Sending RTCP PLI 2014-04-04 15:33:02.005056 [ALERT] switch_rtp.c:1540 Sending RTCP PLI 2014-04-04 15:33:02.185116 [ALERT] switch_rtp.c:1638 sofia/external/xxx@gmail.com audio stat 99.00 3198/3201 flaws: 3 mos: 4.49 v: 30.49 1.88/400.00 2014-04-04 15:33:02.205164 [ALERT] switch_rtp.c:1540 Sending RTCP PLI 2014-04-04 15:33:02.365375 [ALERT] switch_rtp.c:1540 Sending RTCP PLI 2014-04-04 15:33:02.625058 [ALERT] switch_rtp.c:1638 sofia/external/xxx@gmail.com video stat 99.00 2014/2022 flaws: 8 mos: 4.49 v: 265.63 172.09/1600.00 2014-04-04 15:33:07.205182 [ALERT] switch_rtp.c:1638 sofia/external/xx@gmail.com audio stat 99.00 3450/3453 flaws: 3 mos: 4.49 v: 28.75 1.88/400.00 Is there any configuration that I may have omitted? The problem has been observed on both Firefox and Chrome browsers. I apologise for the vague description of the problem - I am quite happy to provide any information that you think is important. Regards, Richard Richard Screene Senior Developer Drum Web Meetings +44 1273 936125 www.thisisdrum.com Drum is the collaboration solution by NetDev Ltd. Registered in England and Wales Company Number 04741258