How about GEM working the sync on a extended screen and a Matrox TripleHead2Go. It gives you three displays + your laptop screen (would not give you an extra on a desktop). Is external so you don't need a slot on your computer and is very cheap (around $300). This is the most basic solution, is this what you need? Saludos.
N/
----- Original Message ----- From: Jaime Oliver To: B. Bogart Cc: the PureData - mailinglist ; marius schebella Sent: Monday, February 25, 2008 9:40 PM Subject: Re: [PD] synchronised video outputs
hi ben,
what mpeg decoder cards with 4 outputs from the same machine are you refering to? I will need to get something like that for an installation, but don't really know much about it.
best,
J
On Mon, Feb 25, 2008 at 8:47 AM, B. Bogart ben@ekran.org wrote:
Check out Jaromil's ivysync, which uses those mpeg decoder cards for
synced output. I think you can do 4 outputs from the same machine, but
I'm not sure if that is a software limit, or just the number of slots
available for those cards. Jaromil did mention something about a network
sync feature also.
As far as I know these decoders are all only 640x480, I imagine the ones
working on linux certainly are.
.b.
marius schebella wrote:
> I am also working on a project like this (with thomas grill, who solved
> many problems before I even thought of them...). in principle
> synchronisation works fine.
> now your may ask why do other people pay so much money for expensive
> hardware?
> the problem lies in details: first resolution: for some cases you want
> to go with the highest available resolution 1080p (and in the future
> even more), and suddenly you will see small appearance of jitter, mostly
> because quicktime is different inside a quicktime player and outside
> quicktime, also because in most cases you have to convert color formats.
> then, compensating a drift without losing frames is very tricky.
> from my experience so far, Pd solutions only work up to 720p and only if
> you use a drift compensating algorithm - sending a bang for every frame
> over the network always causes jitter (although you may not notice).
> It is no big effort to try a pd version and see if you are happy with it.
> marius.
>
> altern wrote:
>> hi
>>
>> I need to have several video outputs that run in sync. A friend who
>> works in a art exhibition space told me there would be couple of
>> solutions for this but both involve buying pretty expensive equipment
>> like special DVD players.
>>
>> I thought then that a solution for this issue could be to have several
>> computers on a local network playing video (with GEM) and synchronise
>> them via OSC. But I dont have any experience doing such a thing, never
>> used OSC for anything similar. Also I dont have a clue about how to
>> synchronise together videos.
>>
>> Has anyone done anything similar? any experiences to share?
>>
>> thanks!
>>
>> enrike
>>
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