H.263 - VX1000S
The Agora Labs VX1000S video codec conforms to the ITU-T H.263 version 1 (March 1996) Recommendation. It is intended for applications requiring low bit rate yet good quality.
This codec has been the most popular choice for Internet, ISDN, PSTN,
and ATM video telephony conferencing and streaming applications. The Agora Labs VX1000S video
codec can support non-standard picture sizes by centering the picture within a standard size