I have a similar problem with Microsoft's HD Video sample files, for example "The Magic of Flight.wmv" will produce an error message along playing the stream "too many video packets in buffer" and turn off the sound.
Any help on how to fix this problem is appreciated.
BTW, I noticed that mplayer complains about not being able to set a parameter in a file /dev/rtc (or similar). It suggests to put the value 1024 in their, but can't access the file.
To be honest I was messing with it last night and I think there is an error on the file, it bugs out in vlc in windows (which work with other ts files).
Will investigate with the HD samples and get back to you.