Thanks Iohannes So, i can conclude that the slaves local frame clocks are taken from the "local" gemhead objects, as explained in Matteo's answer ? Is it more reliable/light than using a metro on each computer (which would allow me to change the playback speed) ???
Also, for the codecs, no, i don't have raid system. And it's mostly laptops with slow drives. But i'm not sure to have some spare cpu to treat a compressed video codec. 2010/1/28 IOhannes m zmoelnig <[email protected]> > changed the subject back to the original mail... > > Marco Donnarumma wrote: > > Yep, I can confirm the same. I worked with three macs connected via LAN > and > > a simple sync via a master works very well. > > this will usually give you quite a lot of jitter, since the "now" in Pd > drifts in the audio-buffer (network jitter is probably neglectable in a > LAN, but of course you also have that), which most likely will lead to > not so smooth playback. > of course it depends on the material you want to play back. > > the solution we came up with, was to have a master frame clock and local > frame clocks on the slaves. > the slaves would adjust their framerates in order to keep up with the > master, if the lag between the master clock and the slave clocks was low > (some frames). > if the lag was too big, the slaves would "jump" to the target value. > > this worked well with several "full size" (cannot remember the actual > resolution) videos played back in sync with live and taped music over 90 > minutes or so. > > > Also, maybe someone could disagree, but in my experience not-compressed > > movies (even full DV) are lighter for the machine. > > uncompressed video is lighter for the CPU, but more load for the > harddisk. the "best" codec always depends on your system (e.g. do you > have a fast RAID-system?) > > fgmasdr > IOhannes > -- http://www.myspace.com/nicotep www.bedroomresearch.com/TEP http://nicotep.free.fr
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