I too will support the "Feed the HDMI port" option.. On my RV the CD/DVD player is 12 years old adn I don't think it has 12 hours of run time.. I don't do much DVDing and most CD work is done on the dash unit while rollign, rolling, rolling.. or on the DVD player in my car... (A DVD player in the car.. Well it's a portable feeding aux in on the Dash AM/FM/FM/Cassette, and Portable CD players are very vibration senistive, not enough buffer, but the DVD player has .. Well,, Lots and lots of buffer so if it looses "Sync" with the CD.. by the time the buffer is empty and the sound is lost.. The thing has re-synced and refilled the buffer so I never notice... Plus, I can always use it as a portable DVD too. Just not on the road (I may use it as such the end of the month for a DVD or two.. Don't know yet)
I also have the ability to blue-tooth it to headsets for sound or to a larger receiver.. I'm thinking about installing a full time blue tooth Audio receiver here in the RV for assorted reasons.