> c) For H.263+ codecs, the frames size can be any multiple of 4 > pixels. See CustomPictureFormat in the H.245 ASN definitions. If recall it is multiple of 8 pixels, and anyway the actual encoded size is a multiple of 16 pixels (padded at the bottom / right). > > d) For H.264 and MPEG4, the frame sizes are constrained by the > profile definitions. Wikipedia has a good table of these - see > http://en.wikipedia.org/wiki/H.264 Same as above: multiple of 8 pixels, then padded to multiple of 16 pixels. Profiles and levels (only the latter for H.264) not only constraint the frame size, but also frame per sec. and bit rate. > 2) If the SIP protocol is being used: > > b) For different flavours of H.263 codecs, you need to understand > the various combinations available in RFC 4629. > c) SIP also uses profiles for MPEG4 and H.264 The codecs have same limitations as above. ____________________________________________________________________________________ Shape Yahoo! in your own image. Join our Network Research Panel today! http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7 ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Openh323-devel mailing list Openh323-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/openh323-devel