I got a bit of a problem and I'm hoping someone would have the answer, so here goes:
I'm trying to get a fullHD movie to play on my 42LD450 thru the USB port. I've done the IR hack and it is working beautifully, except I got a movie with DTS audio track. I used Moeya HD Converter on my mac to make a AC3 audio track and then used Mkvtoolnix to remux to AC3 to the -mkv file. I was optimistic that this would work, but when I plug in my HDD and select the movie, the TV says "Opening the file" and after a good 20 seconds, it says "File not supported". I'm guessing I have to do something differently in Mkvtoolnix, but I dont know what! If someone has been able to change the DTS track to AC3 in a .mkv and gotten it to play on the TV, please tell me how you've managed it!
And on a side note, if you have a good way to this in Windows rather than in Mac OSX, it's no problem. I have Windows running thru BootCamp.