Pd-list April 2012

pd-list@lists.iem.at

98 participants
109 discussions

Re: [PD] GEM write video stream on a single image
by Patrice Colet 09 Apr '12

09 Apr '12

With a redacting a new message to the list I figured out how to get around this message system problem [savepanel] | [set symbol $1( | | | [bang( |/ [( | [set file $1 100( | [pix_write] the symbol argument is prepending file location, so when the patch is saved the message system still recognize file location as a single atom, thanks for your answers, sorry for the noise, happy easter ^^ Colet Patrice ----- Mail original ----- > De: "Patrice Colet" <colet.patrice(a)free.fr> > À: "Patrice Colet" <colet.patrice(a)free.fr> > Envoyé: Lundi 9 Avril 2012 15:44:31 > Objet: Re: [PD] GEM write video stream on a single image > > I've just found how to do it, giving [file image 100( message before > banging [pix_writr] replaces image0000.jpg, perfect... > > now there is another weird thing with messages but it's more related > with pd, this is bogus... > > I use [savepanel] for choosing my image file, and then use [set file > $1 100( for preparing the message that is sent to [pix_write] before > banging it. *The image file location contains space*, and I have to > deal with it. > So when I reload my patch with this message prepared by [savepanel] > it doesn't work anymore because the location with spaces isn't a > single atom anymore but a a list of arguments that pix_write doesn't > understand. > > I tried to put quote marks around the file location like I would do > in dos console but it doesn't work. > > I think this is a bug from message system because it doesn't have > same behavior when the patch is reloaded, > maybe there is a trick to faint this bug? > > Colet Patrice > > ----- Mail original ----- > > De: "Patrice Colet" <colet.patrice(a)free.fr> > > À: "pd-list" <pd-list(a)iem.at> > > Envoyé: Lundi 9 Avril 2012 15:18:48 > > Objet: [PD] GEM write video stream on a single image > > > > Hello, > > > > is there a trick to use [pix_write] for writing on one image.jpg at > > each frame instead of renaming to image001 image002 etc ... ? > > > > Colet Patrice > > > > > > _______________________________________________ > > Pd-list(a)iem.at mailing list > > UNSUBSCRIBE and account-management -> > > http://lists.puredata.info/listinfo/pd-list > > >

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Re: [PD] [OT] sf/bay area anyone?
by Marco Donnarumma 09 Apr '12

09 Apr '12

There will be an installation of mine [1] there, but I won't be able to attend. Was really looking forward to come over, but it's kind of a bad timing for me. Have fun folks! M [1] http://marcodonnarumma.com/works/the-invisible-suns-project/ > since i spend a few days in san francisco (for visiting the linux audio > conference [1] in stanford) i wanted to ask whether there are some Pders > round here who would like to go for a beer... > > fgmasdr > IOhannes > > > > [1] http://lac.linuxaudio.org/2012/ > > > > -- Marco Donnarumma New Media + Sonic Arts Practitioner, Performer, Teacher, Director. ACE, Sound Design MSc by Research (ongoing) The University of Edinburgh, UK ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Portfolio: http://marcodonnarumma.com Research: http://res.marcodonnarumma.com | http://www.thesaddj.com | http://www.flxer.net Director: http://www.liveperformersmeeting.net

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Initializing an array with random data.
by Matthew Tytel 09 Apr '12

09 Apr '12

Hi there, I'm looking for a good way to reinitialize data in an array with random data. Basically I want to be able to bang a subpatch and have it enter totally new randomized data into it. I made one using the step object but it's very hacked together. Any suggestions? Apologies if this isn't the right place to ask, Matt

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[OT] sf/bay area anyone?
by IOhannes m zmölnig 09 Apr '12

09 Apr '12

since i spend a few days in san francisco (for visiting the linux audio conference [1] in stanford) i wanted to ask whether there are some Pders round here who would like to go for a beer... fgmasdr IOhannes [1] http://lac.linuxaudio.org/2012/

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[PD-announce] new GUI obect: filterview, for generating and seeing biquad coefficients
by Hans-Christoph Steiner 08 Apr '12

08 Apr '12

Announcing [filterview], a new GUI object for generating and visualizing biquad coefficients. It allows to you manipulate the filter band, frequency, and gain using your mouse. The magnatude and phase are then graphed in realtime as the parameters changed, and the list of biquad coefficients are output. It is inspired by the [filtergraph~] object in Max/MSP. Thanks to Mike Moser-Booth for doing all of the math behind the scenes. It requires Pd-extended 0.43 to run. I just got to a beta state, it works well for me, but it does crash Pd sometimes when you close a patch with [filterview] in it. Try it out and let me know how it works for you. http://puredata.info/downloads/filterview Also, as a side note, this object is an experiment with a new way of writing GUI objects. It started out as a pure Tcl program, and the GUI part still runs as a standalone Tcl program (try running ./filterview.tcl from the Terminal). This makes development and debugging vastly easier. Additionally, I tried to move more of the GUI code to the Tcl side, so you'll see that it uses fewer widgetbehaviors, and uses Tk's bind feature quite a bit. .hc ---------------------------------------------------------------------------- kill your television _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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GEM: pix_convolve scale factor?
by Matteo Sisti Sette 07 Apr '12

07 Apr '12

Hi, I've noticed that the "smooth" filter in the example patch for [pix_convolve] has a wrong scale factor which results in a slightly darker output image than the input. I don't know much about convolution filters, but the number being bassed to [pix_convolve] seems right to me: 0.0625 which is 1/16, and it seems right since the sum of the coefficients is 16. Is the number being passed as scale factor in the help patch wrong, or is there a bug in [pix_convolve]? Or is this the expected result in a way I don't see? thanks m.

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using still images with pix_background
by Iain Mott 07 Apr '12

07 Apr '12

Following Max's advice on using an image (i'm using a tif file) stored on disk to "reset" pix_background - i'm having difficulty getting pix_background to respond to the still image. I've created an example in the attached file - which involves the following steps (please see the numbered comments in the patch): 1. Choose the camera/input device number 2. load a still image 3. Display the still image in the open Gem window 4. Store the image (attempt to) in pix_background with "reset" message (if you attempt to remove background now, nothing happens) 5. Display video stream in Gem window 6. Remove background The result is that the still image appears not to have been stored. What is stored is the first moment (frame?) of the live video, when it is first displayed in step 5. It seems like pix_background doesn't respond to still images. Do you need to convert the pix_image output to some sort of "video stream"? If so, how is done? Will paste the patch below in case the attachment doesn't arrive. Thanks - happy Easter! Iain #N canvas 541 183 872 614 10; #X obj 62 237 cnv 15 100 60 empty empty empty 20 12 0 14 -195568 -66577 0; #N canvas 1 58 450 300 gemwin 0; #X obj 132 136 gemwin; #X obj 67 89 outlet; #X obj 67 10 inlet; #X obj 67 41 route create; #X msg 67 70 set destroy; #X msg 142 68 set create; #X msg 132 112 create \, 1; #X msg 198 112 destroy; #X obj 189 -61 loadbang; #X msg 188 -38 create; #X connect 2 0 3 0; #X connect 3 0 4 0; #X connect 3 0 6 0; #X connect 3 1 5 0; #X connect 3 1 7 0; #X connect 4 0 1 0; #X connect 5 0 1 0; #X connect 6 0 0 0; #X connect 7 0 0 0; #X connect 8 0 9 0; #X connect 9 0 3 0; #X restore 67 277 pd gemwin; #X msg 67 257 destroy; #X obj 451 233 pix_texture; #X obj 451 255 square 3; #X msg 402 165 reset; #X text 598 188 threshold; #X obj 451 207 pix_background; #X msg 577 173 \$1 \$1 \$1; #X msg 574 101 0.5; #X floatatom 577 157 5 0 0 0 - - -; #X obj 395 86 pix_video; #X obj 201 165 switch 2; #X msg 149 36 1; #X msg 302 67 2; #X msg 640 133 0; #X obj 360 -93 gemhead 261; #X obj 174 94 t f b b; #X obj 38 27 pix_image; #X obj 304 -104 gemhead; #X obj 7 -115 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1 -1; #N canvas 0 0 450 300 openpanel 0; #X obj 114 62 inlet; #X obj 121 254 outlet; #X obj 114 125 openpanel; #X msg 114 162 set open \$1; #X obj 114 199 t b a; #X connect 0 0 2 0; #X connect 2 0 3 0; #X connect 3 0 4 0; #X connect 4 0 1 0; #X connect 4 1 1 0; #X restore 7 -94 pd openpanel; #X msg 6 -66 open /home/iain/projects/espelho/pd/background_stills/teste_low00000.tif ; #X msg 557 -52 device 1; #N canvas 166 121 570 420 device 0; #X obj 204 60 cnv 20 20 20 empty \$0-open-canvas 1 4 10 0 16 -233017 -1 0; #X obj 60 61 hradio 18 1 0 8 empty empty empty 0 -6 0 8 -225271 -1 -1 1; #X obj 60 13 inlet; #X msg 160 254 label \$1; #X obj 160 232 makefilename %d; #X obj 60 108 int; #X obj 60 337 outlet; #X obj 160 277 send \$0-open-canvas; #X msg 130 170 device \$1; #X obj 60 130 t b f; #X obj 130 192 t a a; #X obj 130 298 list prepend set; #X obj 130 320 list trim; #X obj 160 211 route device; #X obj 130 116 loadbang; #X msg 130 138 0; #X connect 1 0 5 0; #X connect 2 0 1 0; #X connect 3 0 7 0; #X connect 4 0 3 0; #X connect 5 0 9 0; #X connect 8 0 10 0; #X connect 9 0 6 0; #X connect 9 1 8 0; #X connect 10 0 11 0; #X connect 10 1 13 0; #X connect 11 0 12 0; #X connect 12 0 6 0; #X connect 13 0 4 0; #X connect 14 0 15 0; #X connect 15 0 8 0; #X coords 0 -1 1 1 165 20 1 60 60; #X restore 557 -76 pd device; #X text 371 147 4 Store image in pix_background; #X obj 279 2 loadbang; #X text 28 -115 2 Load still image; #X text 556 74 6 Remove background; #X text 563 -97 1 Select camera/device; #X text 63 236 comment; #X text 136 17 3 Display still image; #X text 302 44 5 Display video stream; #X connect 1 0 2 0; #X connect 2 0 1 0; #X connect 3 0 4 0; #X connect 5 0 7 0; #X connect 7 0 3 0; #X connect 8 0 7 1; #X connect 9 0 10 0; #X connect 10 0 8 0; #X connect 11 0 12 2; #X connect 12 0 7 0; #X connect 13 0 17 0; #X connect 14 0 12 0; #X connect 15 0 7 1; #X connect 17 0 12 0; #X connect 17 1 22 0; #X connect 17 2 15 0; #X connect 18 0 12 1; #X connect 19 0 11 0; #X connect 19 0 18 0; #X connect 20 0 21 0; #X connect 21 0 22 0; #X connect 22 0 18 0; #X connect 23 0 11 0; #X connect 24 0 23 0; #X connect 26 0 14 0;

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Keystone correction
by Charles Goyard 07 Apr '12

07 Apr '12

Hi list, this is very basic, in fact so basic no one ever asked it seems :) I need to correct the trapezoidal/keystone deformation of a video. The beamer I use can't correct enough, so I need to do that with GEM. I heard of a keystone library but could not find it. I tried various rotate/scale/translate without getting good enough results. So I thought I could have a polygon with a texture mapped on it, and the stretch the corners. The problem I have is that my patch is as follows: [pix_image test.png] | [pix_texture] | [circle 4] (The circle is used to make a mask so the video boundaries are round.) Adding a polygon after the circle does not seem to work. Any advice welcome. -- Charlot

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[PD-announce] LoMus 2012
by Thierry Coduys 06 Apr '12

06 Apr '12

Appel à contribution / Call for participation Désolé en cas d’envois multiples / sorry for possible crossposting LoMus 2012 À la recherche des logiciels libres pour la création sonore et intermedia Pour sa quatrième édition, Lomus 2012 s’adresse à tous ceux qui s’aventurent dans le développement de logiciels libres musicaux ou de logiciels libres qui peuvent contribuer au processus de la création musicale. Un prix sera remis aux logiciels qui font preuve non seulement d’innovation, mais notamment d’inventivité face aux enjeux actuels de la création musicale. Calendrier 6 avril 2012 - Appel à soumissions 25 avril 2012 - Date limite de soumission des logiciels 30 avril 2012 - Notification d'acceptation 11 mai 2012 - Remise du prix lors des JIM 2012 Info : http://concours.afim-asso.org/ JIM2012 : http://www.jim2012.be LoMus 2012 In search of open-source software for musical and intermedia creation For its fourth edition, Lomus 2012 invites music and audio open-source software creators to submit original projects that either directly or indirectly contribute to musical creation. A prize will be awarded to open-source sofware that proves to be not only innovatory but also inventive in the present context of music and audio creation. Calendar April 6, 2012 - Call for submissions April 25, 2012 - Submission deadline April 30, 2012 - Admission notification May 11, 2012 - JIM Awards Ceremony Info: http://concours.afim-asso.org/ JIM2012 : http://www.jim2012.be _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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Make magazine
by Pierre Massat 06 Apr '12

06 Apr '12

Dear list, I just wanted to let you know that somebody at Make wrote a post about my blog yesterday. This caused a sudden burst of visits, and will hopefully turn a few people on to Pd :) . Anyways, I'm very happy right now and I wanted to share the news with you. A warm thank you to everyone in the list who's helped me put my setup together! Cheers, Pierre. http://blog.makezine.com/2012/04/04/guitarextended-uses-arduino-and-pd-to-c…

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Pd-list April 2012