[Mplayer-dvb] PCR in PES: a/v sync?

[gianca2000 at tin.it]

I hope that someone can reply me.

Does mplayer use the PCR in the PES files? If it does, can you tell me why 
sometimes I got lip-sync faults? I experienced this with PES made in 
realtime with dvbstream + remux process taken from VDR. I sync the received 
stream on the first I-frame I detect (due to a bug in mplayer that 
sometimes it don't guess the rigth source type), then I send via pipe the 
stream to mplayer. I have the a/v sync problems with and without 
-framedrop. I use -cache 2048. The player runs on a Pentium III 800mhz, 
dga(video) + sdl(audio), Slackware 8.0 + kernel 2.4.16.

I think that the problem is in the clock reference because the video and 
audio drift during the movie: first is audio late, after some minutes is 
the audio earlier than the video!

Thanks

GB