you must have an output "xineplug_inp_xvdr.so" then, you can play using xine cmd line:
xine xvdr://127.0.0.1:37890
FYI, I have been successfully using xineliboutput *for years* with VDR 1.6.x. The *only reason* I felt this worth reporting to the mailing list is because it has all stopped working after upgrading to VDR 1.7.x.
YES, I have the xvdr plugin!
$ ls -als /usr/local/lib/xine/plugins/1.29/*vdr* 460 -rwxr-xr-x 1 root root 463196 NovĀ 7 23:29 /usr/local/lib/xine/plugins/1.29/xineplug_inp_xvdr.so
Geez!
Cheers, Chris