Macromedia (now Adobe) literature states that the FLV/SWF variant of Sorenson is related to H.263. The matter of versioning may account for the fact that the Wikipedia article on the Sorenson codec associates the codec with both ITU-T H.263 (see MPEG-4_V) and H.264 (see MPEG-4_AVC). Spark may be the successor to the Sorenson codec, version 3, initially described at this Web site in 2004 comments welcome. Sorenson Media promotional information for version 4.5 of the Squeeze software application, consulted in February 2007, lists a number of possible output formats, including MPEG-, -2, and -4, and Flash Output (Spark). The compiler of this description is uncertain about Sorenson's version numbers.
Bitstream encoding for video developed by Sorenson Media, Inc.
