[vlc] choosing play time from rtp/rtcp timestamp

[Beni Mahler]

hello all

i am engineering student working with audio synchronisation of multiple 
pc's within a LAN. I would like to play back one multicast stream on 
different machines who are within audible distance. they all need to 
play back the stream in +/- 0.05 seconds from each other. Therefore I 
thought of sending an RTP/RTCP Stream from a server, and then connect to 
the stream using vlc, mplayer... interpreting the RTCP Timestamps to 
determine the wallclock time, when the data was generated. To be sure 
all stations play the sound synchronously, I wanted to add a 'fix' 
delay, e.g. 3sec to the time, when the packet was generated and to play 
it at this time. I have read in the vlc mailing list that the LIVE.COM 
code automatically uses the information in RTCP reports to convert these 
to accurate presentation times, BUT does vlc permit me, to set a fix 
delay between the ntp time when the packet was generated and the moment 
when it is played? i think vlc normally determines this delay depending 
on the network. i know that mplayer usually caches a number of bytes 
before playing.


cheers

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