I've been looking into this so can't say I've a good solution, but will share what I have learned so far.
First decision to make is playing the blu-rays while on 12v
power only. The DVD player in our Airstream is a Sony automotive in-dash headunit (12v). There do not seem to be any in-dash blu-ray payers out there or any coming. I suspect this is because most car video is for backseat where the Blu-ray high resolution is wasted on the tiny screens.
Sharp has a series of blu-ray players that have a 12v
power brick so can run off a 12v
battery if direct wired. Amazon.com: Sharp BD-HP90U Blu-ray Disc Player - 1080p: Electronics
The audio could feed into the aux inputs of the Airstream's Sony headunit. (getting true surround sound out is another discussion)
Another off-grid solution is a laptop with a blu-ray drive and HDMI or Displayport output to the flatscreen. HDMI carries video and encoded 5.1/7.1 audio.
For surround sound there are a few things more to think about
- Blu-rays have a very high quality audio that will not transmit over USB or fiber (SPDF/Toslink) unless it is down-sampled to DVD audio quality
- a Dolby decoder is needed and if you do not want down sampled audio, this will have to use the HDMI output of the blu-ray player
- a 6 or 8 channel amplifier is needed
- current Arstream speakers are not ideally located to use as the front and rear surround channels.
- 7.1 may be overkill in the small listening area in an airstream so 5.1 may be fine
- 2.1 sound bars may be a good option for an airstream. I have not figured this out yet but they are an awkward size to mount in an airstream and may or may not do justice to Bluray surround audio
- If downsampled 5.1 audio, equivalent to the DVD quality, is OK there are some decoder solutions available in USB
. Or, for 7.1 high resolution bluray sound an HDMI model
- some of the Sony head units Airstream uses can simulate 5.1 surround sound through 4 speakers - check owners manual, I think some may even have a center speaker output.
I have decided to go with a 12v only solution so am starting to narrow things down.