i need to sync two movies with one audio track, because we're using two 

video projectors. The first movie is on the same machine as the audio 

track, and it's ok. But i send all the infos (start toggle and frame 

count) through OSC to a second machine to launch and sync the second 

movie. Result is really bad, something like more than 1sec late on the 

If max/jitter won't be ok because of the lag we wouldn't be able to get 

f.e chanfrault | aka | personal computer music

>>>>>>> |sublime music for a desperate people|

i need to sync two movies with one audio track, because we're using two 
video projectors. The first movie is on the same machine as the audio 
track, and it's ok. But i send all the infos (start toggle and frame 
count) through OSC to a second machine to launch and sync the second 
movie. Result is really bad, something like more than 1sec late on the 
second machine... Any ways to fix that ?

If max/jitter won't be ok because of the lag we wouldn't be able to get 
rid of, what other solution you know ?

-- 
f.e chanfrault | aka | personal computer music
 >>>>>>> http://www.personal-computer-music.com
 >>>>>>> |sublime music for a desperate people|


synchronizing-two-movies-on-two-boxes

dont have first person experinace with this.

https://cycling74.com/forums/index.php?t=msg&th=25370

> i need to sync two movies with one audio track, because we're using two

> video projectors. The first movie is on the same machine as the audio

> track, and it's ok. But i send all the infos (start toggle and frame

> count) through OSC to a second machine to launch and sync the second

> movie. Result is really bad, something like more than 1sec late on the

> second machine... Any ways to fix that ?

> If max/jitter won't be ok because of the lag we wouldn't be able to get

> f.e chanfrault | aka | personal computer music

> >>>>>>> |sublime music for a desperate people|

dont have first person experinace with this.
see [*Synchronizing 3 projections]
*https://cycling74.com/forums/index.php?t=msg&th=25370

On Thu, Feb 28, 2008 at 12:23 PM, f.e 
wrote:

> Hello,
>
> i need to sync two movies with one audio track, because we're using two
> video projectors. The first movie is on the same machine as the audio
> track, and it's ok. But i send all the infos (start toggle and frame
> count) through OSC to a second machine to launch and sync the second
> movie. Result is really bad, something like more than 1sec late on the
> second machine... Any ways to fix that ?
>
> If max/jitter won't be ok because of the lag we wouldn't be able to get
> rid of, what other solution you know ?
>
> Thanks
>
> f.e
>
> --
> f.e chanfrault | aka | personal computer music
>  >>>>>>> http://www.personal-computer-music.com
>  >>>>>>> |sublime music for a desperate people|
>

http://kiritanflux.de/lab/patch/mietzplayer

perhaps this helps:
http://kiritanflux.de/lab/patch/mietzplayer


usually sending info through ethernet is pretty fast when sending simple commands, it is another thing when you send constant fluxus of data .

i have good experiences using aka.datagram to format my outgoing/incoming messages into standard udp packets ( although OSX only)

> Result is really bad, something like more than 1sec late on the 

hi f.e, could you send a patch ?
usually sending info through ethernet is pretty fast when sending simple commands, it is another thing when you send constant fluxus of data .

> Result is really bad, something like more than 1sec late on the 
> second machine... Any ways to fix that ?
>


MIDI might be another simple cheap method of sync. I've used midi to trigger video on a second machine in Isadora from Max via midi. But that was untra simple play triggers and nothing fancy.

SMPTE time code could also be used to try to get it frame accurate. I haven't tried this, but a couple midi interfaces with smpte might work.

MIDI might be another simple cheap method of sync.  I've used midi to trigger video on a second machine in Isadora from Max via midi. But that was untra simple play triggers and nothing fancy.

SMPTE time code could also be used to try to get it frame accurate.  I haven't tried this, but a couple midi interfaces with smpte might work.


this works perfect between macbookpro and intel macmini over airport.

i used similar patch between 4 G4 macminis, also without problems.

i made this patch just to show how i do it. there might be some extra

bangs on receiver end - movie wouldnt work in fullscreen when i only

i made this patch just to show how i do it. there might be some extra
bangs on receiver end - movie wouldnt work in fullscreen when i only
used time message, so i added a bang...

P.S. don't forget to change ip adresses on server patch.

I'm working on an installation that has 2 computers each playing about 6

different films (autostart 0), though only 2 are actually bang'ed at any 1

time, with a 3rd computer driving the OSC messages to a time message for

each of the other 2 computers. The time messages are coming from an audio

track which is then snapshot, and scaled by the framerate. I get really

nice performance and everything is nicely in sync. The metro is currently

sent via osc as well but I'm now thinking they don't need to be as they are

only used to output the current matrix...

I'm working on an installation that has 2 computers each playing about 6
different films (autostart 0), though only 2 are actually bang'ed at any 1
time, with a 3rd computer driving the OSC messages to a time message for
each of the other 2 computers.  The time messages are coming from an audio
track which is then snapshot, and scaled by the framerate.  I get really
nice performance and everything is nicely in sync.  The metro is currently
sent via osc as well but I'm now thinking they don't need to be as they are
only used to output the current matrix...

in the previous patch i just posted, then the send video-top and send

in the previous patch i just posted, then the send video-top and send
video-bottom are just the OSC messages:

This is a an old thread, but I figured I'd reply because I took suggestions from it and turned them into a working patch for multichannel video playback. I made it into a pair of client/server apps and released it into the world as freeware so non-MAX users could have fun too. The source patches are in the download image in case anybody wants to bend it to their needs.

http://www.zachpoff.com/site/software/software.html

I appreciate any feedback, so by all means try to break it.

It's called MultiScreener and it's here:
http://www.zachpoff.com/site/software/software.html

Synchronizing two movies on two boxes ?