 -V|--video-buffer num
 
       The maximum video buffer usage required to decode the stream in KBytes.
       The default is 46KB the (tiny) size specified for VCD.  The size to use
       for SVCD is the (more reasonable) 230KB.  If you  are  encoding  for  a
       half-decent  software decoder it makes sense to push this up to 500K or
       more.
