I found out how to get to the remote control:
1. kill RootApp
killall -SIGKILL RootApp
2. kill DVDPlayer
killall -SIGKILL DVDPlayer
you can read /dev/venus_irrp which is remote control
it might be useful to delete this device and make a fifo so you can send controls from console. and it might be possible to write a program which can tweak DVDPlayer to play specific music file by sending this commands.
We have to find out how to use codecs. This would be even more efficient.
I don't know how to publish this here.