> > MPEG decoding in MAME is currently sort of taboo due to mpeg patents, from what I > > hear. > > Once the MPEG patents expire (in 2011 iirc) it will certainly be added. > > 2018 for MPEG audio. Not sure which ones would cover a video-only implementation. > > Saturn and ST-V games use a custom encoder for FMV (often Duck TrueMotion). The > system isn't powerful enough to decode true MPEG without add-on hardware (which the > Bass Fishing games use).
Some research into active patents relating to MPEG-1: