Pd-list April 2005

pd-list@lists.iem.at

141 participants
255 discussions

converting [pan~] from -45 - 45 to 0 - 1
by Hans-Christoph Steiner 12 Apr '05

12 Apr '05

I am writing a set of panning externals written in Pd that will have a standardized interface so that all of the pan objects use the same options, etc. I plan on implementing a number different algorithms (equal power, linear, etc.) and have them all use 0 as left and 1 as right. Also, they will all have the requisite [line~] inside as well. The idea is a set of complete pan control objects. The problem is that the motex lib has [pan~] and [pansig~], both of which use -45 as left and 45 as right. How much do people use these objects? AFAIK, motex is not maintained anymore (perhaps it doesn't need to be). Would it be a major hassle if these objects were deprecated, so that in future distros, you'd have to call the motex [pan~] by [motex/pan~] or set the -path option to include it? .hc ________________________________________________________________________ ____ Man has survived hitherto because he was too ignorant to know how to realize his wishes. Now that he can realize them, he must either change them, or perish. -William Carlos Williams

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pdp_ieee1394: grabber,initialization failed
by justin c. rounds 12 Apr '05

12 Apr '05

i found this on an old thread -- is this still the case? or is there another workaround besides rebooting? BEGIN QUOTE ----------- The nifty pdp_ieee1394 object looks like it isn't re-entrant yet (i.e., you can't create a second pdp_ieee1394 object, even in another patch after one has been destroyed). This might show up with a bunch of lines like "pdp_ieee1394: SGIdle failed." or "pdp_ieee1394: grabber initialization failed". If you run into this, I think the only way to fix it is to close pd and restart. It's not pretty, but from the commented- out code, it seems like there's some trouble with the implementation. --------- END QUOTE -- __________________________ justin c. rounds __ d..b /[]\ /\ [/(o)][:+:][/(o)] http://justincrounds.org/ __________________________

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Re: [PD] pdp2gem.pd_darwin?
by ydegoyon＠free.fr 12 Apr '05

12 Apr '05

ola, well, i'm sorry but it crashes on linux, with latest gem from cvs : > pdp2gem : a bridge between PDP/PiDiP and GEM v0.5 (ydegoyon(a)free.fr & tigital(a)mac.com) > pdp2gem: colorspace is unknown 1097859072 > pdp2gem: using default colorspace: YUV > pd_gui: pd process exited > ./start-pd: line 9: 6360 Segmentation fault and, also, the version number should be increased to 0.6 ( as well as in the CHANGES.LOG ) cheers, sevy james tittle wrote: > On Apr 10, 2005, at 10:02 PM, Patrick Pagano wrote: > >> >> Is there such a beast working? > > > > yup: just committed it to cvs, and also put a pre-compiled version on my ugly website: > > http://homepage.mac.com/tigital > > notes from the readme: > > notes: > > - now allows you to select the colorspace that pdp's yv12 image format is converted to. This means we can now request a YUV colorspace, which is computationally much faster than yv12 to RGB or RGBA (so much so that it is the default). Colorspace can be indicated on object creation (ie. [pdp2gem RGB]) or by message (ie. [colorspace YUV<) > > - now uses standardized color conversions found in GemPixUtil.cpp, which includes altivec speedups! These use formulae from http://www.poynton.com/notes/colour_and_gamma/ColorFAQ.html#RTFToC30 > > - please note that colorspace switching between objects is handled automatically by GEM unless specifically stated (ie. by [pix_yuv], [pix_rgba], [pix_grey]) > > enjoy! > > james > > > _______________________________________________ > PD-list(a)iem.at mailing list > UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list > >

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Re: [PD] pdp2gem.pd_darwin?
by shreeswifty 12 Apr '05

12 Apr '05

thanks i will try this. i was having funky results with pdp_iee1394, pdp_live~ and pdp_compose. I was hoping to chroma-key pick over a Quicktime. this stuff is gonna be very nice looking when it plays nice cheers~ On Tue Apr 12 09:25:51 EDT 2005, james tittle <tigital(a)mac.com> wrote: > On Apr 12, 2005, at 9:15 AM, Patrick Pagano wrote: > >> how do i properly apply this patch james? >> i have not done this for pd yet :-) > > ...place the patch in the the src directory and then go to > terminal, change into the pd/src dir, and type "patch -p0 < > nameofthepatch"...not that the -p0 is a zero...alternatively, you > could just copy paste it from the patch to s_loader.c: it's just > a few lines of code and should be fairly obvious...then recompile > pd and your good to go! > > james > > > Patrick Pagano, B.S.,M.F.A Candidate Research And Development Assistant Digital Worlds Institute University Of Florida (352) 294-2070

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pidip other question
by shreeswifty 12 Apr '05

12 Apr '05

i compiled the mp4ip on OS X last night, how do i use the source tree for mp4player to work properly? On Tue Apr 12 09:25:51 EDT 2005, james tittle <tigital(a)mac.com> wrote: > On Apr 12, 2005, at 9:15 AM, Patrick Pagano wrote: > >> how do i properly apply this patch james? >> i have not done this for pd yet :-) > > ...place the patch in the the src directory and then go to > terminal, change into the pd/src dir, and type "patch -p0 < > nameofthepatch"...not that the -p0 is a zero...alternatively, you > could just copy paste it from the patch to s_loader.c: it's just > a few lines of code and should be fairly obvious...then recompile > pd and your good to go! > > james > > > _______________________________________________ > PD-list(a)iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > > Patrick Pagano, B.S.,M.F.A Candidate Research And Development Assistant Digital Worlds Institute University Of Florida (352) 294-2070

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processing
by Kyle Klipowicz 12 Apr '05

12 Apr '05

Hi list~ I was wondering if anyone had used processing (http://processing.org/) for interface work or algorithm programming. It is made by some people at MIT and is based in Java. It has libraries which allow UDP and OSC communication, as well as much video stuff. I have just grown curious about it, so any comments from experienced users would be appreciated. ~Kyle -- http://perhapsidid.blogspot.org (((())))(()()((((((((()())))()(((((((())()()())()))) (())))))(()))))))))))))(((((((((((()()))))))))((()))) ))(((((((((((())))())))))))))))))))__________ _____())))))(((((((((((((()))))))))))_______ ((((((())))))))))))((((((((000)))oOOOOOO

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gem: newWave and textures
by Thoralf Schulze 12 Apr '05

12 Apr '05

Hi list, applying textures to a newWave geo is a bit like a game of hazard: it sometimes works okay, but most of the time it doesn't. The object tangles gem in a way that it doesn't even apply the same texture to a straight geo (like a cube) in the right way anymore, the whole renderchain gets twisted somehow ... It looks like the texture is being blowed up by an enormous amount. I fooled around with different texture sizes (power of 2 / non-pow2), newWaves creation arguments and the grid size, but their influence on this behaviour seems to be erratic at best. It would be really great if someone could come up with a workaround that cures this behaviour - I really like newWaves look ... thanks in advance, Thoralf. Strangely enough, if this happens with one renderchain (say, dv-cam -> newWave), activating another (usb -> different newWave) makes everything straight again. ___________________________________________________________ Gesendet von Yahoo! Mail - Jetzt mit 250MB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de

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framesynced midi recorder/player
by wolfgang schwarzenbrunner 12 Apr '05

12 Apr '05

hi list... here is the question: since quiet a time i am working on project which simply generates bw lines in dv resolution and higher. those lines are midi controlled from a logic environment. now - as the stuff finally looks the way i want, i am looking for a way to capture it. to get it on tape in dv res is an easy task to do but the most parts of it only work out in higher resolutions (hd). if i want to capture in resolutions like 1080 x 720 or even 1920 x 1080 i need to use pix_write -- and this -- off course -- is not working in realtime. i thought of a little workaround which could work out: in a first run i run the stuff without any video capturing. only the midi data should be captured to a kind of timeline which is rasterized to 25 fps. in a second run the captured midi data is played back by a player which goes 1 frame forward each time pix write has finished rendering 1 frame. i think this would be a possibility for a nice off-line rendering system. somehow... did anyone ever tried to build a system like this? does anybody have a tip or a glue how to do? i think a thing like that might be useful for a lot of users anyway. regards wolfgang

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Downsampling to 8KHz
by Iain Mott 12 Apr '05

12 Apr '05

hello list! I'd like to be able to downsample to 8000Hz in a sub-patch in order to save a file at that rate and encode it in the "speex" format (speex is optimised to deal with 8k files). Because block~ and switch~ specify the downsampling factor in reciprocal form (eg. 0.5 is a factor of 2, 0.25 a factor of 4 etc), I find i'm stuck specifying a factor of 6 (running Pd at 48k a 6-fold downsample will give me 8k). Because the reciprocal of 6 is a recurring number and there's no quantising of values in the source to find the nearest multiple of 2, errors result when trying to specify a 6-fold downsample (eg. a number like 0.16666). Can anyone see a solution to this - besides altering the source or using a utility such as sox to do the conversion to 8k (which i'm doing presently). Would it be useful to anyone else if block~ and switch~ could quantise to multiples of 2? ie. could this be included in subsequent pd releases? cheers, iain _________ Iain Mott www.reverberant.com

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Chroma key Gem
by Thomas O Fredericks 11 Apr '05

11 Apr '05

Hi list. I want to do a bit of chroma key with Gem but the pix_chroma_key object is not what I need. pix_chroma_key will mix 2 pixes together along a chroma value. I need to transform a certain chroma range into transparent pixels so that certain parts of the texture a see through. Any suggestions? Tom

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Pd-list April 2005