This article has been updated as of 30 April 2013 to add info about recording to .mp4 files and the H.264 video codec. AVChat 3 uses a media server (like Red5 and FMIS and Wowza) to stream audio and video between users. The audio and video data travels from the broadcaster user to the media server and from there to the receiver/viewer . While it passes  through the media server the audio and video data can be captured and stored in .flv file,  or, starting with build 2330, in .mp4 files. The file type that will be created depends on the video codec being used (Sorenson Spark or H.264). Codecs being used… The audio data will be encoded with wither the[…]