I think video stream should not be running when create in " on_media_update()" , it should be controlled by app just as audio stream is connected to conference slot in "on_call_media_state()". If video is running at creating time, that time the ice transport may not negotiated, video will lost some frames, especially the first key frame. This will cause video distortion or delay, bad for user experience. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20120625/4c0ff7a1/attachment.html>