Hi, Calling between two Grandstream GXV3275 i expected to have a video call at 1280x720, but the video that is present at destination as the resolution of 352x288 and the image as poor quality, originator is sending video at 1280×720.  If i swap the devices the result is the same, the destination always get a bad resolution of 352x288 but the originator receives the video at expected resolution of 1280x720. If i set rtp_direct between the two endpoints it work as expected. I also tested a conference room and force the it resolution to 1280*x720 it work well,  if i don't force the canvas-size i see: 2018-06-26 13:55:02.077824 [WARNING] mod_conference.c:3157 Unspecified video-canvas-size, falling back to 1280x720 And the conference is done at 1280x720. I've open a jira where you can find a full log with this behavior: https://freeswitch.org/jira/browse/FS-11140 I don't understand why there is transcoding and mod_av is used, the codec negotiated is the same.. i understand that the resolution is at 352x288 for the first frames sent by the phone but then it send them at 1280x720,  mod_av should detected and adjust the new resolution, no? Anyone experience this behavior? -- Saludos / Regards / Cumprimentos Anónio Silva