Pd-list March 2015

pd-list@lists.iem.at

68 participants
80 discussions

Re: [PD] OSC over netsend -u -b
by Dan Wilcox 13 Mar '15

13 Mar '15

If you're using Pd 0.4.6+, look at the help for [oscformat] which you can use in place of mrpeach packOSC. Basically: [1.23 < <-- message or list to send | [oscformat /osc/address] <- set address and format incoming data | [list prepend send] | [list trim] | [netsend -u -b] From: "Peter P." <peterparker(a)fastmail.com> > To: "pd-list(a)iem.at" <pd-list(a)iem.at> > Cc: > Date: Thu, 12 Mar 2015 17:09:40 +0100 > Subject: [PD] OSC over netsend -u -b > Hi list, > > I am trying to send OSC messages over [netsend -u -b] which I formatted > using [packOSC] from mrpeach net library without any further > modification (as I would do using [udpsend]). > > I get on the console: > netsend: no method for 'float' > supposedly because [netsend] expects the keyword "send" followed by a > list of numbers to send. > > Since OSC messages formatted by packOSC vary in length, how could I send > data over [netsend -u -b]? > > Thanks for any ideas! > P > -- Dan Wilcox @danomatika danomatika.com robotcowboy.com

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GEM Motion Capture
by Joshua Curley 13 Mar '15

13 Mar '15

Hello! I am new to Puredata extended. I wanted to set up a motion control patch and I found a few online to try out. I used these patches. https://sites.google.com/site/skriyl/Home/pd-projects <https://sites.google.com/site/skriyl/Home/pd-projects> For some reason I am getting this red error message when I try to “create.” could not make new SG channnel error -9405 [pix_video]: no valid video backend found I am using GEM: ver: 0.93.3 and Pd version 0.43.4-extended. I also am using the latest updated from Apple: Yosemite If anyone has any tips or advice for working my way around this problem it would be greatly appreciate. My goal ultimately is to use motion capture and sound generation to do live sound mashing using motion from ym webcam. Thanks Josh

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Pd performance relationship to CPU model
by Roman Haefeli 13 Mar '15

13 Mar '15

Hi all I've been using Pd and having netpd sessions on my 8 year old Laptop happily ever since. Recently, I was doing a session on my much newer (1 year old) work computer and I was hitting the CPU limit much quicker than I'd expected. I booted my old laptop and loaded the session there and the Pd load on a core was around 55%. The old laptop has Core 2 Duo T8300 (2.4GHz) CPU, the newer one a i5-3427U (1.8GHz) CPU. Admittedly, the newer model goes under 'ultrabook' while the old one is a classic old-school quite heavy laptop. Still, I'm surprised to see that the per-Core performance has _decreased_ over the time. It seems that (mobile) CPU development is focused on "more cores" and "less power" and less on "more performance per core". Which is probably a good thing in general, but not quite what would benefit Pd. Now, what should I do when my beloved thinkpad dies? Asking naively: Do I need to buy another ugly|bulky|heavy laptop to get the performance I got used to? A thing I'm wondering about is that a CPU benchmarking website [1] lists for the i5-3427U a single thread rating of 1435 and for the T8300 a rating of 934. So, according to this benchmark, the newer model is supposed to be faster, even when running single-threaded applications. Obviously, benchmark results most likely depend on the type of test load and running many Pd patches is a different kind of load from what was used to do the benchmarking. Maybe I'm asking naive questions, but are there CPU models known to be good for DSP-like workloads? Would Pd's performance benefit from those? How can one identify "good" models? What happened to the "newer = faster" rule? [1] http://www.cpubenchmark.net Roman

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svg script (with pdlua?)
by João Pais 13 Mar '15

13 Mar '15

Hello list, I wanted to create an svg file using Pd, but it's a bit hard, as the character "," can't be used by [textfile]. There could be some ways to circumvent this such as using another character and change it in a text editor. But I would like to ask if there is any other examples, e.g. about using [pdlua] or something else to create the file. The file to be created would look a bit like this: <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="400">  <g stroke="black" transform="translate(20,20) scale(.78)" font-size="10" font-family="Courier"> <line x1="0" x2="390"/> <g transform="translate(0,0)"> <text x="5" y="-5">V0</text> <line y1="-5" y2="5"/> </g> <g transform="translate(180,0)"> <text>V1</text> <line y1="-5" y2="5"/> </g> <g transform="translate(250,0)"> <text>V2</text> <line y1="-5" y2="5"/> </g> <g transform="translate(300,0)"> <text>V3</text> <line y1="-5" y2="5"/> </g> <g transform="translate(390,0)"> <line y1="-5" y2="5"/> </g> </g> </svg> Thanks, jmmmp

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OSC over netsend -u -b
by Peter P. 12 Mar '15

12 Mar '15

Hi list, I am trying to send OSC messages over [netsend -u -b] which I formatted using [packOSC] from mrpeach net library without any further modification (as I would do using [udpsend]). I get on the console: netsend: no method for 'float' supposedly because [netsend] expects the keyword "send" followed by a list of numbers to send. Since OSC messages formatted by packOSC vary in length, how could I send data over [netsend -u -b]? Thanks for any ideas! P

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[GEM] Latest OS X version working with GEM
by Dan Wilcox 12 Mar '15

12 Mar '15

The plan so far seems to be "hope somebody will update GEM with the new OS X frameworks". Obviously that hasn't happened. I feel a little guilty in having started working on it last year but then it became low priority with work and everything else pretty quickly. I simply don't use GEM that much to where it was super important to me. OTOH I'll look to see (aka ask friends at institutions) if I can find some funding to support working on it, probably in the summer That would be worth my time (aka I don't have to do it for free). I've worked with the native Mac stuff now for a few years so I have a pretty good understanding of them now. From: Jaime E Oliver <jaime.oliver2(a)gmail.com> > To: "IOhannes zmölnig" <zmoelnig(a)iem.at> > Cc: pd-list(a)lists.iem.at > Date: Thu, 12 Mar 2015 08:57:39 -0400 > Subject: [PD] [GEM] Latest OS X version working with GEM > Well, it's good to know for teaching… > So I wonder what is the plan to keep compatibility with OS X moving > forward... > Thanks! > J > > On Mar 12, 2015, at 1:39 AM, IOhannes zmölnig <zmoelnig(a)iem.at> wrote: > > Am 11. März 2015 23:24:29 MEZ, schrieb Jaime E Oliver < > jaime.oliver2(a)gmail.com>: > >> So what is the newest version of OS X with which GEM will work? > >> > > > > I have mavericks installation that appears to work fine, but i'm no > expert in the shallow depths of osx > > > > mfg.ugd.fhj > > IOhannes > > > > -- > > Sent from my pdp-11 > -- Dan Wilcox @danomatika danomatika.com robotcowboy.com

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communicating with c++ app using OSC
by Paul Keyes 12 Mar '15

12 Mar '15

Hi, I'm sending a list from pd to a c++/liblo app like so: [mylist] | [list prepend /osc_addr] | [list trim] | [packOSC] ... How can I read this list into an array or vector in the c++ app? There seems to be lots of libraries, I've been testing liblo, but nothing straightforward for receiving a list. Any help is greatly appreciated!

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Re: [PD] Pd-list Digest, Vol 120, Issue 36
by Dan Wilcox 11 Mar '15

11 Mar '15

If you're already using liblo (which is a great library BTW), you don't need oscpack. They both work with OSC. I think you're missing some understanding on the fundamentals of OSC. An OSC message has an address and a number of arguments, so a "list" in OSC will just be a message with that number of arguments. To read them out in C++ with liblo (or pretty much any other OSC library), you get the message and check that the address is what you expect, check the number of arguments, and for each argument, you check the type (int, float, stirring, etc), and then pull the actual value as the type you want out. Basically something like this in pseudo C++ : if (message.address == "/expected/path" ){ vector<float> list; for( int i = 0; i < message.numArguments; ++i) { if (message.argumentType(i) == FLOAT) { list.push_back(message.argumentAsFloat(i)) } } liblo is a C library and what I wrote above is more applicable to oscpack which uses classes, but the liblo function calls do exactly the same thing. Also, you can check agains the type string as well which has 1 char per type aka sending a message for pd like "/hello" 1.2 2.3 4.5 will have the types string of "fff" for 3 float arguments. On a related point, I have a C++ wrapper liblo library that makes it work like oscpack :D https://github.com/danomatika/oscframework ---------- Forwarded message ---------- > From: Py Fave <pyfave(a)gmail.com> > To: > Cc: "pd-list(a)lists.iem.at" <pd-list(a)lists.iem.at> > Date: Wed, 11 Mar 2015 15:42:11 +0100 > Subject: Re: [PD] communicating with c++ app using OSC > i have seen this used successfully on c++ side > > oscpack -- Open Sound Control packet manipulation library > http://www.audiomulch.com/~rossb/code/oscpack > > > > 2015-03-11 8:56 GMT+01:00 Jamie Bullock <jamie(a)jamiebullock.com>: > >> >> Hi Paul, >> >> std::vector doesn't make a good container for OSC messages, as message >> argument types aren't generally contiguous (a message could be two ints >> and a float, for example). >> >> Instead you need some intermediate data structures to handle argument >> lists, introspecting types from arguments and unpacking values. This is >> what oscpack does: >> >> >> https://code.google.com/p/oscpack/source/browse/trunk/examples/SimpleReceiv… >> >> It's straightforward to use and I've found it reliable. >> >> Jamie >> >> >> On Tue, Mar 10, 2015 at 7:42 pm, Paul Keyes <spskeyes(a)gmail.com> wrote: >> >> If I really want to use OSC is there a simple way to do it? >> >> On Fri, Oct 24, 2014 at 4:10 PM, Miller Puckette <msp(a)ucsd.edu> wrote: >> >>> Hi Paul - >>> >>> No need to use OSC for this - you can just use "netsend". THere's sample >>> code for receiving from netsend in pd/src/u_pdreceive.c. >>> >>> cheers >>> Miller >>> >>> On Fri, Oct 24, 2014 at 03:21:22PM -0300, Paul Keyes wrote: >>> > Hi, >>> > >>> > I'm sending a list from pd to a c++/liblo app like so: >>> > >>> > [mylist] >>> > | >>> > [list prepend /osc_addr] >>> > | >>> > [list trim] >>> > | >>> > [packOSC] >>> > >>> > ... >>> > >>> > How can I read this list into an array or vector in the c++ app? >>> > There seems to be lots of libraries, I've been testing liblo, but >>> nothing >>> > straightforward for receiving a list. >>> > >>> > Any help is greatly appreciated! >>> >> -- Dan Wilcox @danomatika danomatika.com robotcowboy.com

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VLC 2.1.x and Gem
by Etienne Landon 10 Mar '15

10 Mar '15

Hi list, I want to get web camera streams into Gem, with different streaming formats (mainly http and rtmp). VLC plugin seems like the perfect way to handle that, but I can't get it to work with Gem. I know pdgst could be a solution but vlc has the advantage that I could handle any stream type the same way (where gst needs a different pipe). On Mint17 and Ubuntu 14.04 Gem crashes with segfault as soon as I try to open anything with VLC (like |driver vlc, screen://( ) Both use vlc 2.1.4, I also tried 2.1.6 (vlc stable-daily ppa), same behaviour. Having seen this thread <http://sourceforge.net/p/pd-gem/bugs/211/>, I tried the symlink removal without success, so made a gdb backtrace (attached with this message, usefull information are in the last lines) Config for this backtrace is : Freshly installed, updated Ubuntu 14.04.1 VLC 2.1.4 pd-extended 0.43.4 Gem 0.93.git 374f713 freshly compiled I had success regarding VLC and Gem on Ubuntu 13.10, which uses vlc 2.0.8. But with that vlc version, my stream is really long to start and stops after one minute or so. VLC behaviour between 2.0.8 and 2.1.4 regarding rtmp looks very different, in vlc 2.1.x changelog they say "New RTMP input module, using libavformat!", which might explain that (seems that it was ffmpeg before). Has anyone successfully compiled vlc plugin for gem with recent vlc version ? Or any idea what other solution I could try ?

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[GEM] Latest gem?
by Jaime E Oliver 10 Mar '15

10 Mar '15

Hi everyone, I am getting errors when running: sudo apt-get build-dep gem a few libraries are not installing and I think I might have an older version of gem. So, I wonder where is the latest gem lately? Is it on git still?(git clone git://git.code.sf.net/p/pd-gem/gem)? best, J

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Pd-list March 2015