You’ll probably want to pastebin (http://pastebin.freeswitch.org) a complete call log of this happening… there is probably config issue or an endpoint sending something that’s not quite right From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Sina Aghasi Sent: Wednesday, January 25, 2017 5:15 AM To: freeswitch-users@lists.freeswitch.org Subject: [Freeswitch-users] Freeswitch H26x negotiation problem Hi I using FS 1.6 . I've compiled it source codes. There is no problem when doing a video call using VP8 codec, but when I restrict the clients to use H263 or H264 codecs, no video is shown. After investigating FS logs and network packets, i found out that clients request H263 or H264 but FS does not negotiate it! Following lines show that FS only compare H264 with VP8: 2017-01-25 05:58:07.132032 [DEBUG] switch_core_media.c:4843 Video Codec Compare [H264:108]/[VP8:99] 2017-01-25 05:58:07.132032 [DEBUG] switch_core_media.c:4843 Video Codec Compare [H264:99]/[VP8:99] Although H264 is loaded as "show codec" output is: ... codec,GSM,mod_spandsp codec,H.261 Video (passthru),mod_h26x codec,H.263 Video (passthru),mod_h26x codec,H.263+ Video (passthru),mod_h26x codec,H.263++ Video (passthru),mod_h26x codec,H.264 Video (passthru),mod_h26x ... codec,VP8 Video,CORE_VPX_MODULE codec,VP9 Video,CORE_VPX_MODULE 30 total. This problem occurs in video conference call and point to point call. Any solution?