- mpeg program stream
   - better bitrate detection for wrong mux_rates
   - operate in pull mode
   - index
   - DVD specific stuff
   - export clock

 - mpeg transport streams
   - query/convert/events
   - check/correct for PCR disconts
   - reconstruct PAT/PM if not seen in stream
   - pull mode scheduling?
   - program selection (with interface?)
   - use more stuff if relevant (splicing etc...)
   - merge update PAT/PM correctly based on version
     numbers etc..