Hi! As usual - thank you for advice. This question become more clear for me. I did next experiment: 1. Set H264 encoder resolution as 1280x720. 2. Start video call throw Asterisk PBX. Video resolution is 1280x720. 3. Set resolution for ?264 codec as 800?600 by command vid codec size H264 800 600 4. Video call is continued with the same OLD resolution(1280x720). 5. End current call. 6. Imminently start the new video call. Resolution for video is 800?600. So, As I understand - it my summary - I can change the video resolution, but it take an affect only after start a new next call. If I'm not right(PJLIB developers are the most competent in this question) - please correct my point of view. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20120726/75084c05/attachment.html>