hello everyone!

i just signed up to this forum. and here's immediately my first question.^^

i wonder, if there's a possibility to watch an incoming video signal and at the same time listen to the sound, that is generate by its data. i tried to connect the gemhead directly to a dac~ object and sometimes i even get so squarewave bursts! but no constant sound out put.

i'm pretty new to pd and any hint for further reading or already existing patches that do more or less what i described above would be nice.

thanks a lot!

cheese nucles

check out [pix_pix2sig~] and [pix_sig2pix~]

hmv

Hello,
I'm a newbie too.
My wish is the same as yours : I'm working on a "cinema-concert".

So, I've got a film ( black and white ), I load it in Gemhead, I play it, and that I want is to generate data from variations of this film ( real-time black and white analysis ; real-time brightness analysis ; number of pixels .... ).
After that, I'd want to set up these data's variations for audio effects controlling through MIDI.

I've ever put pix_info in my patch.
First, it don't analys that I want from the film.
Second, it's not real-time ( I mean, it generates one info and after nothing )

I've found some infos about motion analysis on the net, but people get often oder softwares for to make these real-time datas.

I hope my english is not too bad, and that someone can help me.

Many thanks in advance,
Damien

Hi damiensko!
´
There are a lot of ways to do that you want. Try the object [pix_histo]. This object create an histogram from image (check it in the "help" patch). If you want to create the histogram from a picture, change the object [pix_image] with [pix_film] and try to run it. The result is: the tables will move with the movement of the film. Then, in your "sound" patch you must to read the table result with another object (tabread, i think) and transform data in sound. Another way is that "pulsed" say: [pix_pix2sig~], but, personally, I don´t like it. Choice your option and, if you find another, tell us please.

Regards.

one problem is that pix2sig and sig2pix both have the same help file but not exactly inverse functions as far as I can tell

how, for example, can I get useful data out of pix_pix2sig~?
all I get is "bad vector size"and "no method for gem-state"

You can find the pix2sig help file in: ⁨~ ▸ Documents⁩ ▸ ⁨Pd⁩ ▸ ⁨externals⁩ ▸ ⁨Gem⁩

You might be getting "no method for gem-state" if you connect an object that takes signal input to the first outlet of the pix2sig object - the signal outputs are outlets 2, 3 and 4. Outlet 1 is for the gem data to pass through.

"bad vector size" could be because you've used block~ or switch~ to something other than the vector size you've set in your prefs. I believe PD adc and dac need to run at the same vector size as what's in the preferences. To do this you could route the signal into another pd window, and there have your dac object.

@bklindgren wow! thank you for answering this question from long long ago. It turns out that I am again looking for image to sound solutions so I will explore what you suggest.

Are you playing a viola in your profile picture?
I am also a violist!
cheers,
Jorge

ahh sorry for the very late reply yes, fellow violist! -Brian