Le 01/06/2026 à 13:03, João Pais a écrit :
if you want to make a live stream, i would use obs and pd /gem
the video output from gem as a layer in obs.
the video is live, but it's just colored rectangles (small and big). maybe with
some enhancement of the corners etc. to make it smoother/prettier.
dividing tasks seems simpler.
what is the output definition in pixels ?
not sure yet, probably a multiple of 1500x750 like 3 or 4 times that. will
depend on how visible the small shapes are.
I already ran into a general question that I will probably soon find an answer,
but experienced people here will know better (I couldn't find any simple
example in the patches and html documentation). Since I have a poster with
absolute xy coordinates in mm, I wanted to program the patch similarly. But the
rendering is made from the center, and with different units.
My idea is to make a general conversion of the units systems, feed mm into the
patch and use [translate] to get the correct output. Is there a general formula
to convert my values to the gem dimensions and size? Trying out the x/y shape
size of a rectangle didn't seem to have the same ratios to the mm values to
fill the whole screen. For now the screen size is 1500x750.
I don't understand : it is 1500mm or 1500 pixels?
anyway, the perspec message to gemwin allow to change the coordinate system
used by Gem. If your screen size is 1500mm wide, you can set the x axe to go
from 0 to 1500. Then translate will work in mm. And this is independant of the
pixel size of the gemwin.
Cheers
c
Joao
Le dim. 31 mai 2026 à 11:39, cyrille henry via Pd-list <[email protected]> a
écrit :
hello,
I think you should use the software you know best!
for image bigger than 8096 pixels, you should check if your GPU can handle
such size.
Cheers
Cyrille
Le 31/05/2026 à 00:36, João Pais a écrit :
> Hi list,
>
> for a project I'm considering if I should use Gem or processing. The
purpose is to map the live playback of a piece of music into a poster with the
score of around 2200x1100cm, by marking which notes and layers are active.
>
> The patch is controlled live by Pd, possibly at some point the score
itself might also be projected as well (9090 x 4545 px at 150dpi).
>
> The development is being done in windows, but it's possible that it will
have to run on mac or linux. Considering these remarks, is there any reason not to
use the newest Pd version, or avoid Gem?
>
> The projection itself will be very simple, using some colors for the
playback line and other layers, color transitions, etc. Not taxing for the cpu at
all.
>
> Best,
>
> Joao
>
>
> ---
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