[PD] pd/gem as vj mixer at win (Vadim Smahtin)

[simon wise]

On 19 Feb 2008, at 6:46 PM, tim wrote:

> simon wise wrote:
>>
>> On 19 Feb 2008, at 12:06 AM, tim wrote:
>>
>>> Sergi Lario wrote:
>>>>
>>>> Hi. I trying to create 2 channel videomixer in pd/gem. And now  
>>>> have 2
>>>> questions- how i can make 2 gemwin's to use 1 as preview and  
>>>> other as
>>>> output, and second- how i can make file list or grid of images to
>>>> preview my videofiles and then load it's to pix_film. Big thx.
>>>>
>>>>
>>>> Hi.
>>>>
>>>> About multiple gemwin at same time: I don't know if it's  
>>>> possible, but
>>>> it would be very useful.
>>>>
>>> Hi Sergi,
>>>
>>> I've done stuff with two gemwins by running pd 2 times and have  
>>> the two
>>> instances communicate over OSC.
>>> It worked quite well.
>>
>> a while ago there was a multiple-Gemwin version of Gem around - I  
>> tried out the binary that was available and it worked fine (I  
>> think on OSX but possibly Linux?) but I used the 2 pd method  
>> instead for my project.
>>
>> I don't know if it is possible for one pd to use textures or  
>> buffers created in the other, that would make the preview idea  
>> work well with two pd instances.
> My idea was rather to simply sync the messages so that the same  
> video file is loaded by the two pd's separately.
> I wasn't using any texturing with this setup though, so I don't  
> know if it would work.
>> Soon I want to try 2 camera views of the same 3D space, I think  
>> that would be much easier in a single instance of pd with two  
>> windows!
> Load the same 3D space in the two pd's and relate the control data  
> in some way ?

without textures and lots of pix work this is fine - but I'm wanting  
to use plenty of movies and largish graphics as textures, which would  
be present from a different point of view in each of the windows.

It would be better to only read from the drive once, then decode  
using the CPU a single time, and to only transfer one copy to the  
graphics card - so it seems either 2 windows in a single pd or a way  
to pass references to textures already loaded between 2 different  
pd's is what I'm looking for, but I'll fall back on one machine per  
projector if required.


simon