[MPlayer-users] ASF files

[SMuelas]

Can anyone tell me what kind of file is a *.ASF file?
MPlayer runs it wonderfully but I would like to know if I can append 2
or more files or "recompile" (crop, resize ...) them with mencoder
-- 
Santiago Muelas (Depto. de Mecánica)         
http://w3.mecanica.upm.es/~smuelas
ETSI de Caminos, Canales y Puertos (U.P.M)    smuelas at mecanica.upm.es
Dr.Aranguren s/n - Ciudad Universitaria       Tf. 91 336 6659
MADRID 28040