Pd-list July 2005

pd-list@lists.iem.at

116 participants
170 discussions

gradients in gem?
by chukku 07 Jul '05

07 Jul '05

Hi, is it possible to make gradients in gem? ? thankx -- chukku chukkku(a)fastmail.fm -- http://www.fastmail.fm - Faster than the air-speed velocity of an unladen european swallow

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PDP Webcam problem
by Andrew Cavers 07 Jul '05

07 Jul '05

List, I'm having a peculiar problem accessing my webcam within PD using PDP. The camera works fine outwith PD (using mplayer, for example). My camera is a Logitech Quickcam Pro 4000 and I'm running PDP 0.12.2 (from the sourceforge CVS - I had the same problem with 0.13), PD 0.38-4 and the most recent pwc driver (10.0.7a) on a 2.6.12 kernel. The symptoms: as soon as I try to open the device from within PD and send the output to pdp_xv, top says PD is using 60% of the cpu, an xv window is created but is black. I get the following message in the PD window: pdp_xvideo: grabbed port 64 on adaptor 0 pdp_v4l: no device opened pdp_v4l: attempting auto open pdp_v4l: opening /dev/video0 pdp_v4l: cap: name Logitech QuickCam Pro 4000 type 1 channels 1 maxw 640 maxh 480 minw 160 minh 120 pdp_v4l: picture: brightness 36864 depth 24 palette 15 pdp_v4l: channel 0 name Webcam type 2 flags 0 pdp_v4l: switched to channel 0 pdp_v4l: buffer size 925696, frames 2, offset 0 462848 pdp_v4l: using VIDEO_PALETTE_YUV420P pdp_v4l: frame 0 0, format 15, width 320, height 240 pdp_v4l: Opened video connection (320x240) pdp_v4l: detected pwc pdp_v4l: camera framerate set to 27 fps This all looks pretty good does it not?! PD CPU usage stays at 60% until I quit the patch. When I use mplayer to access the device at the same resolution and fps (320x240 @ 27fps), it uses about the same amount of CPU. (I'm using a 600mhz machine). But, dmesg shows that my webcam driver was giving the following output: pwc set_video_mode(320x240 @ 27, palette 15). pwc decode_size = 3. pwc Using alternate setting 6. pwc frame_size=31800, vframes=27, vsize=3, vsnapshot=0, vbandlength=530 pwc Frame buffer underflow (31808 bytes); discarded. pwc Frame buffer underflow (4 bytes); discarded. pwc Frame buffer underflow (29692 bytes); discarded. pwc Frame buffer underflow (15520 bytes); discarded. pwc Frame buffer underflow (31808 bytes); discarded. pwc Frame buffer underflow (4 bytes); discarded. ... [and so on while the patch is running, I guess] ... pwc Frame buffer underflow (16205 bytes); discarded. pwc Closing video device: 2424 frames received, dumped 0 frames, 180 frames with errors. I don't get these errors when accessing the device using mplayer. So - I think the problem lies with pdp_xv. It outputs video from pdp_noise fine, but only if I have not yet tried to output pdp_v4l in that session. pdp_glx, does produce output from the camera but increases my cpu usage to 100% and makes the system extremely unresponsive. Any ideas?! I hope that this is enough information for someone to have an idea about what's going wrong. Any help would be much appreciated! Cheers, Andrew. -- Andrew Cavers andy(a)mution.com www.mution.com

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pix_sig2pix, block size and audio in a patch
by Paris Treantafeles 07 Jul '05

07 Jul '05

Hi List, I have been creating several patches using pix_sig2pix and using block~ 4096 to create some visuals that i really like. Now, I've run into a slight problem.... Rather than using oscillators as inputs to pix_sig2pix, I'd like to use a sound file in a patch. To hear the sound file, it appears that I have to use a default block size of 64, but then the pix_sig2pix gives only 64 pixels of data. Is there a work around so that one can read a sound file into a patch and send it to dac and have pix_sig2pix use some value greater than 64? A somewhat cheesy but interesting result occurs by living with pix_sig2pix at 64 and using pix_crop to stretch the image to the full window. Thanks, p

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[PD-announce] py/pyext 0.2.0 - python script objects
by Thomas Grill 06 Jul '05

06 Jul '05

Hi all, here's just another one: a new major release of the python script objects. List of changes: - support for Max/MSP 4.5 (OSX and Windows) - handling of Python threads - new detach mechanism (call queue) - output of single atoms instead of 1-element lists - enabled "int"-tags for pyext class functions - Python symbol type (convertible to string with str()) - py: when no function is given on the command line, let it be selected by message tag - fixed that__init__ wasn't called on reload - _del method in pyext-derived class can be used to clean up things on exit - solved py->py messaging problem with lock count instead of message queuing (much faster) - buffer and dsp support via numarray module (if present) - new objects for dsp processing: pyext~,pyx~,pyext.~,pyx.~ - correctly report Python errors while constructing the object download as usual from: http://grrrr.org/ext/py best future, Thomas

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Why does the Gem lib not load on 0.38-4 (OSX 10.3.9)
by Jan Meinema 06 Jul '05

06 Jul '05

Hi, I have installed PD-0.38-4 - extended version on OSX 10.3.9. PD seems to work but it does not load the GEM Library. Do I still need to start PD from the terminal if I want to use Gem? Or can I change the App to always load Gem. Best Wishes, Jan Meinema

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flext 0.5.0 - c++ layer for cross-platform external development
by Thomas Grill 06 Jul '05

06 Jul '05

Hi all, i just uploaded a new release of flext, a c++ layer for cross-platform development of PD and Max/MSP externals. Several bugs have been fixed and some features been added. - new build system for flext and flext-based externals - added lock-free Lifo and Fifo structures and used it with message queueing and thread management - eliminated default "help" (m_help) method... should be implemented in the flext-based object - changed virtual callback names m_loadbang, m_method_, m_dsp, m_signal, m_click to CbLoadbang, CbMethodResort, CbDsp, CbSignal, CbClick (but kept compatibility methods) - removed virtual m_assist function (which was only useful for Max)... stick to static assist strings - removed virtual flext_dsp::m_enable function (which wasn't present for Max/MSP) - added m_click method which gets called on alt-click (PD) resp. double clicks (Max) onto the object box - replaced memory-intensive STL maps by custom-made vector/map-monster (should be fast!) - better timers for Windows - slimmed down object data structures and changed initialization code accordingly - fixed the attribute editor for 0.38, stopped redundant transfer of script code - fix for long attribute dialogs - show saveable attributes on object select (edit mode) - flags for object construction and destruction phase (Initing() and Exiting()) - enhanced buffer handling - use new PD idle callback for queues messages (currently in devel_0_38) - eliminated misleading flext_dsp::ChannelsIn and ChannelsOut - fixed bug for symbol messages into non-left inlets - digest one-element float/int/symbol/pointer list messages as single atoms - simplified message analysis - made flext::Forward thread safe - added some more SIMD functionality - some fixes for 64 bit builds (finally working?) ... and more Download as usual from http://grrrr.org/ext/flext have fun, Thomas

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joystick external windows
by Urs Liska 06 Jul '05

06 Jul '05

Hi, I'm rather new to Pd and new to this list and would like to post a first question. (Fortunately I could cancel all the previous mails starting with this sentence because I found solutions earlier, but this time I have to ask.) I am looking for a windows joystick external that supports the 'point-of-view' switch. After nearly 20 years accompanied by computers, Pd for the first time justified buying a joystick ;-) And I think it was really a good idea. I then installed the pd_joystick external by J. Sarlo which works very well except for the mentioned 'pov'-switch (which is - for those who don't know - a button that can be pushed to 8 directions). I asked J.Sarlo if there is any chance for an update, but he told me he doesn't work on this external anymore. Additionally he told me there were several externals available (for Linux and Windows), but I wasn't able to find anything on the net. So the question is: does anybody know of a newer joystick external that works in Windows XP? Thanks a lot Urs

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video acquisition cards, dual streams
by jasch 06 Jul '05

06 Jul '05

my apologies for cross-posting. ------ hello, for a very long term installation (i.e. permanent 24/7) i need to receive 2 streams of video on a single machine. the video is component/analog, VGA at 25fps or thereabouts and the card(s) would be on the PCI-bus (PCI-X?). my questions: what products are there that have: a) two analog inputs or b) allow for 2 cards in the same machine with the same driver accessed twice? do i have to c) use two different products? this would be on a dual Powermac G5 running either PD, softVNS, Jitter etc., so the drivers would have to be OS X compatible (Quicktime...). i read about osprey cards (are there OS X drivers?), i know about the imaging source boxes/cards (allows for 2 cards ?), i've heard about the miglia alchemyTV card (allows for 2 cards? the website says so). i'm gladly seeking any type of advice, ideas, products, comments, personal experiences, etc. on or off-list thank you jasch

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controlling pd with OSC
by Marco Kuhn 06 Jul '05

06 Jul '05

Hi List, I had develop an 3d motion tracking application and i will extend it with osc to get an 3d music controller. i'm not familiar with dealing OSC messages . i will use pd as an OSC server and my 3d_mtrack application as an OSC client. Could anyone give me an example to get an OSC Server in pd? Does anyone have experience with an OSC-Client in C and could give an implementation example? My program is written in C. It's an Client -/ Server App.I got the tracking position with 2 webcams at each client which send the coordinate's with UDP to the SERVER where i transform the coordinates to an 3d vector with coordinate range from 0 to 1.I visualize it with opengl and it works in realtime. I have the pd externals with OSCx and the OSC-Kit. I'm in hurry, because that's an student project and it should be ready the next week. Thanks in advance Marco

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Re: [PD] on a continuing pidip install
by Andrew Cavers 06 Jul '05

06 Jul '05

Dominic, You quitter you! I'm not giving up on my current Slack installation just yet. It's taken me a month to get as many things installed on it as I have so far and PiDiP is about the last thing I need to get working! Installing the latest version of ImageMagick solved the compile problem. It all compiled fine. Then when I loaded pd with -lib pdp /path/to/pdp and -lib pidip /path/to/pidip I get: /home/andy/pidip-0.12.19/pidip.pd_linux: /home/andy/pidip-0.12.19/pidip.pd_linux: undefined symbol: quicktime_close pidip: can't load library The problem now was clearly with the quicktime install. I then realised that the version of PDP that PD was loading was one I compiled a while ago without quicktime support. I deleted that, made sure that PD loaded the version of PDP with quicktime support and: PDP: pure data packet PiDiP : additional video processing objects for PDP : version 0.12.19 ( ydegoyon(a)free.fr ) pdp_colorgrid: version 0.4, written by Yves Degoyon (ydegoyon(a)free.fr) & Lluis Gomez i Bigorda (lluis(a)artefacte.org) Looks like it's working! Haven't tried any patches yet. I'll save that excitement for tomorrow. I still need to get my webcam working anyway... Yves - thanks a lot for your help! Andrew. On 7/5/05, dominic <samuraiskillz(a)blueyonder.co.uk> wrote: > hi there, > > I gave up on pidip in fedora3 (ccrma). I run it in debian, demudi. Its > very simple to apt-get by adding the following to your sources list:- > > deb http://sindominio.net/~caedes/debian/ unstable main > deb ftp://ftp.nerim.net/debian-marillat/ unstable main > > I'm building another demudi box this week for a supercollider workshop we are running. I'll make a record of all the stages I go through and mail you a copy if you want to give it a go. > > good luck > > Dominic > > > > On Tue, 2005-07-05 at 20:21 +0100, Andrew Cavers wrote: > > Yves, list, > > > > Thanks for the reply. I have ImageMagick 6.1.9. I see in the > > CHANGES.LOG file that it 0.12.19 has been adapted for Image Magick > > >6.1.9. Do you mean >=6.1.9 or should I upgrade?! My error message is > > copied below. Now I look at it again I see it can't find a file > > (magick/xwindow.h) - maybe I should reinstall/install ImageMagick? > > > > I am trying to install 0.12.19 downloaded from your webpage. > > > > Cheers, > > > > Andrew. > > > > pdp_capture.c:35:28: magick/xwindow.h: No such file or directory > > pdp_capture.c: In function `XMyGetWindowImage': > > pdp_capture.c:207: warning: dereferencing type-punned pointer will > > break strict-aliasing rules > > pdp_capture.c:539: warning: dereferencing type-punned pointer will > > break strict-aliasing rules > > pdp_capture.c:545: warning: dereferencing type-punned pointer will > > break strict-aliasing rules > > pdp_capture.c: In function `pdp_capture_sendpacket': > > pdp_capture.c:796: warning: passing arg 2 of > > `pdp_packet_pass_if_valid' from incompatible pointer type > > make[1]: *** [pdp_capture.o] Error 1 > > make[1]: Leaving directory `/home/andy/pidip-0.12.19/modules' > > make: *** [pdp_pidip_all] Error 2 > > > > On 7/5/05, Yves Degoyon <ydegoyon(a)free.fr> wrote: > > > which version of ImageMagick is it? > > > > > > anyway, is it the latest pidip - 0.12.19 ?? ( it should be fixed ) > > > > > > saluti, > > > sevy > > > > > > Andrew Cavers wrote: > > > > > > >Dominic, list, > > > > > > > >I second your request for help at this point of the pidip install! I > > > >only just got that far; came across that problem; searched the > > > >mailing-list archive for a solution and found your message that went > > > >unanswered. Have you managed to get pidip installed yet? > > > > > > > >I'm running Slack 10.1 with 2.6.12. PD 0.38-4 and PDP and PiDiP from > > > >the sourceforge CVS. > > > > > > > >I'm also currently having problems with accessing my webcam in PDP, > > > >but I'll start a new thread for that! > > > > > > > >Andrew. > > > > > > > >On 6/20/05, dominic <samuraiskillz(a)blueyonder.co.uk> wrote: > > > > > > > > > > > >>Hi List, > > > >> > > > >>Ok nearly there making pidip on an fc3 ccrma machine. > > > >> > > > >>I uncompressed the pd source and the ffmpeg source and the configure > > > >>when well. > > > >> > > > >>I did make clean. It went ok > > > >> > > > >>I did make and it went ok until I got this:- > > > >> > > > >>pdp_capture.c: In function `XMyClientWindow': > > > >>pdp_capture.c:123: warning: implicit declaration of function > > > >>`XWindowByProperty'pdp_capture.c: In function `XMyGetWindowImage': > > > >>pdp_capture.c:201: warning: dereferencing type-punned pointer will break > > > >>strict-aliasing rules > > > >>pdp_capture.c:329: warning: implicit declaration of function > > > >>`XDestroyImage' > > > >>pdp_capture.c:433: warning: implicit declaration of function `XGetPixel' > > > >>pdp_capture.c:533: warning: dereferencing type-punned pointer will break > > > >>strict-aliasing rules > > > >>pdp_capture.c:539: warning: dereferencing type-punned pointer will break > > > >>strict-aliasing rules > > > >>pdp_capture.c: In function `pdp_capture_do_capture': > > > >>pdp_capture.c:562: error: `XTextProperty' undeclared (first use in this > > > >>function) > > > >>pdp_capture.c:562: error: (Each undeclared identifier is reported only > > > >>once > > > >>pdp_capture.c:562: error: for each function it appears in.) > > > >>pdp_capture.c:562: error: syntax error before "window_name" > > > >>pdp_capture.c:574: error: `XError' undeclared (first use in this > > > >>function) > > > >>pdp_capture.c:655: warning: implicit declaration of function > > > >>`XGetWMName' > > > >>pdp_capture.c:655: error: `window_name' undeclared (first use in this > > > >>function) > > > >>make[1]: *** [pdp_capture.o] Error 1 > > > >>make[1]: Leaving directory `/usr/lib/pd/externs/pidip/modules' > > > >>make: *** [pdp_pidip_all] Error 2 > > > >>[root@localhost pidip]# > > > >> > > > >>Can anyone help me out here? what does it mean? > > > >> > > > >>dominic > > > >> > > > >> > > > >>_______________________________________________ > > > >>PD-list(a)iem.at mailing list > > > >>UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list > > > >> > > > >> > > > >> > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- -- Andrew Cavers andy(a)mution.com www.mution.com

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Pd-list July 2005