convert avi to .pes? (.vdr file)

hi

is it possible to convert video files (by mplayer supported of course) 
to the PES format that vdr uses? the playback on old machines is often 
to slow for live watchig a video, but converting it first to a valid vdr 
file+index would be great ... 

is there any other software which can do this? 
( i looked in the manpages, but found no option for pes format )

mfg hermann