hi, I'am using freeswitch 1.7.0+git~20151119T221015Z~9e0f30c58b~64bit (git 9e0f30c 2015-11-19 22:10:15Z 64bit) on ubuntu 14.04 I have configured webrtc with ws and vedio (mod_vpx). video calls working properly through the extensions then i try to configure video conference with following configurations dial-plane <extension name="cdquality_conferences"> <condition field="destination_number" expression="^5555$"> <action application="answer"/> <action application="conference" data="$1-${domain_name}@video-mcu-stereo"/> </condition> </extension> conference.conf.xml <profile name="video-mcu-stereo"> <param name="domain" value="$${domain}"/> <param name="rate" value="48000"/> <param name="channels" value="2"/> <param name="interval" value="20"/> <param name="energy-level" value="200"/> <!-- <param name="tts-engine" value="flite"/> --> <!-- <param name="tts-voice" value="kal16"/> --> <param name="muted-sound" value="conference/conf-muted.wav"/> <param name="unmuted-sound" value="conference/conf-unmuted.wav"/> <param name="alone-sound" value="conference/conf-alone.wav"/> <param name="moh-sound" value="local_stream://stereo"/> <param name="enter-sound" value="tone_stream://%(200,0,500,600,700)"/> <param name="exit-sound" value="tone_stream://%(500,0,300,200,100,50,25)"/> <param name="kicked-sound" value="conference/conf-kicked.wav"/> <param name="locked-sound" value="conference/conf-locked.wav"/> <param name="is-locked-sound" value="conference/conf-is-locked.wav"/> <param name="is-unlocked-sound" value="conference/conf-is-unlocked.wav"/> <param name="pin-sound" value="conference/conf-pin.wav"/> <param name="bad-pin-sound" value="conference/conf-bad-pin.wav"/> <param name="caller-id-name" value="$${outbound_caller_name}"/> <param name="caller-id-number" value="$${outbound_caller_id}"/> <param name="comfort-noise" value="false"/> <param name="conference-flags" value="rfc-4579|livearray-sync|livearray-json-status|video-muxing-personal-canvas|video-required-for-canvas"/> <param name="video-mode" value="mux"/> <param name="video-layout-name" value="3x3"/> <!-- <param name="video-layout-name" value="group:grid"/>--> <param name="video-canvas-size" value="1920x1080"/> <param name="video-canvas-bgcolor" value="#333333"/> <param name="video-layout-bgcolor" value="#000000"/> <param name="video-codec-bandwidth" value="1mb"/> <param name="video-fps" value="15"/> </profile> When I call the conference number, i got error on console as. "[ERR] mod_vpx.c:675 VPX encode error 8:Invalid parameter:Image size must match encoder init configuration size" looking for advice to solve this. -- Best Regards.. Achintha