[vdr] audio skips on NFS recording playback

I have a remote VDR box which holds a bunch of recordings.

I attach from the local VDR box via an NFS share.

Every 2-5 minutes I get a 1/2 second slip in audio, but no logs are written in /var/logs/messages, kernel messages or on the VDR console. There are also no reported errors on eth0. I don't get these audio slips playing locally recorded files.

Can anyone suggest any more detailed logs I can look at? I had suspected when the playback moved between files (001.vdr 002.vdr etc) perhaps there was a slip - but I can't see what file the player is up to.

Is there any logs I can run to show the audio stream being played?

Thanks

Simon

vdr-1.4.6 locally vdr-1.5.2 remote recorder