I'm going to eb hopefully getting my teeth back into this project after a while on the shelf.
One thing I was dubious on was how to handle the shutting down of the Pi safely when the car is switched off without causing corruption in the filesystem.
One method I am interested in is making the filesystem read only; If i can setup a read only system nothing will need to be saved during a shitdown sequence and will therefore protect it during sudden powerless.
I've recently set up a bank of Raspberry Pi A+ boards at work to handle playing videos on our foyer screens in our buildings and I am using MP4Museum to do so.
This has nailed the read only filesystem, so would love to build something like this for my project.