problems with dvbstream / mplayer

I'm having problems with the following network setup:

PC with DVB card
=============
terminal 1: tzap <channel>
terminal 2: dvbstream -ps <vpid> <apid>

PC with display
===========
terminal 1: mplayer  rtp://224.0.1.2:5004

It basically works, ie I get packets going over the network and I get
a video and audio display. However, it's really corrupted and totally
unwatchable. I've tried adding various -cache values, but this does
not improve it.

The mplayer terminal screen shows a stream of errors that look like this:

Stray packet (seq[18]=53557 seq=53555, newseq=-2 found at 16)
Stray packet (seq[18]=53557 seq=53556, newseq=-1 found at 17)

Is this a bug in dvbstream? Is this code maintained? I can't get to
the author's website at linuxstb.org, and the version I have (0.5)
appears to be quite old.

I have good reception, and when I capture to a file with dvbstream,
the file plays back just fine. Any ideas? I'm not stuck on using this
combination of programs if there is a better alternative.

thanks
Andrew