Pd-list May 2007

pd-list@lists.iem.at

160 participants
312 discussions

GEM mapping units to pixels
by altern 13 May '07

13 May '07

hi I am trying to map GEM units to pixels so that i can position some videos in the GEM window using pixels values. For this I understand that i must match the projection values with the window size. So i am doing dimen 400 300 perspect 0 400 0 300 1 20 and i render all objects at z position 1 translateXYZ 100 100 1 However I am getting a weird result, the units are far smaller that pixels, so to move a video 100px in the x i need to change it x position by 300 units or something like this. So I am not sure about what i am doing wrong, I am familiar with OpenGL but i never played too much with GEM before so I am still getting into it. Another small issue is that I would also like to reverse the Y so that upper left is 0,0 and bottom left would be 0,200 for example, not sure about how to change this. I guess it is to do with the gemwin settings but i dont get it right. thanks enrike

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avifile-0.7 ppc
by peter boehm 13 May '07

13 May '07

hi everybody, compiling Gem from cvs on ppc i get the following error: ------- /usr/include/avifile-0.7/avm_stl.h:275: error: invalid use of constructor as a template /usr/include/avifile-0.7/avm_stl.h:275: note: use 'avm::vector<Type>::vector' instead of 'avm::vector<Type>::class avm::vector<Type>' to name the constructor in a qualified name make[2]: *** [filmAVIPLAY.o] Fehler 1 -------- i have: libavifile-0.7-dev 0.7.38.20030710-1.2 libavifile-0.7c102 0.7.38.20030710-1.2 and the same error was already posted by Peter Plessas http://lists.puredata.info/pipermail/pd-list/2006-10/043170.html thanks in advance for help Peter

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pix_film problems in Ubuntu
by Kristofer Hagbard 13 May '07

13 May '07

Hi Im trying to play an avi file under GEM 0.90 with the included example but i get this: pix_film:: quicktime support pix_film:: libmpeg3 support MPEG3: unsupported! error: GEM: pix_film: Unable to open file: test.avi I open it by sending a [open test.avi( and the avi is in the same folder as the patch. It works nicely under WinXP (gem 0.91 i think.) on another computer but not on my Ubuntu 7.04 with latest nvidia drivers for GeForce 8800 GTS. My color depth is set to 16 due to a crappy screen. I'll be very happy for any ideas what could be the problem. Thanks in advance! .kristofer

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Re: [PD] Zero delay feedback, with settable send?
by Kim Taylor 13 May '07

13 May '07

Thanks that was a well written explanation, it makes much more sense now. I read the help for [block~] about the catch~/throw~ 'weirdness'. And although it says... "Patches using send~/receive~ or throw~/catch~ to intercommunicate must have the same blocking..." ...If I create a patch with [throw~ X] and [catch~ X] and [block~ 4] (all in the *same* patch, so presumably with the *same* blocking) I still get an output saying "error: throw~ test: vector size mismatch" How bizarre and frustrating! K

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[OT] Pd in Cairo or Alexandria?
by Greg Pond 13 May '07

13 May '07

I have a friend who is living in Cairo and working at the library in Alexandria. He is also pursuing a master's degree in new media studies. I recently introduced him to Pd. He would like to find people in his country or otherwise somewhat nearby who use Pd. Anyone know of any Pd'ers out there? greg

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Re: [PD] Zero delay feedback, with settable send?
by Kim Taylor 13 May '07

13 May '07

OK- after realising that throw~ can be set to different destinations and operate at lower blocksizes, I tried to make a 0 length feedback system using throw~ and catch~ See attachment or this link: http://www.zen26398.zen.co.uk/temp/throwcatchfeedback6.pd In this patch, a triangular excitation is sent first to dummy inlet of 'catchmod' (to force order) and then to 'throwmod'. The signal gets thrown to a catch in 'catchmod' and this abstraction outputs the signal to a table graph. The graph is written upon triggering, so it shows any delays in the system. It seems to work, however: I get error messages at the output- >error: sigcatch A-test: unexpected vector size >error: throw~ A-test: vector size mismatch I didn't get these with a default 64 bit blocksize. Why would the vector size be unexpected or mismatched for a blocksize of 1? Anyone know if this is a problem? K

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Re: [PD] Zero delay feedback, with settable send?
by Kim Taylor 12 May '07

12 May '07

>... The time it takes > logically is zero: The full block is written into the delay line > immediatly (that is: at the same time, delread~ reads it, see below). OK, But how can a full block be written to a delay line before it has happened? You say the time it takes is logically zero, but in order to write a full block of samples to a delayline, 64 bits of the input signal would have to have elapsed before this can happen surely? For example: lets say there is an input signal to the explicitly defined sequence of delwrite~ - delread~ - output At t=0 the sample starts playing. Surely only until t=64 can a block be written by delwrite~ (immediately), and read (immediately) by delread~? I think I am thinking about this in the wrong way. Sorry for being slow :p K

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Gigaport AG multiple channel output doesn´t work
by pony＠mrpony.com 12 May '07

12 May '07

Hi, this is my first time here, allthough I´ve been searching thru the archives for solutions many times. Great list, very helpful! Now to my issue: I´m making a project with a Gigaport AG with 8 analog out´s, and I want to run all outputs in the same time. On -asio -listdev it says (I only take the outputs now..): output devices: 0. Microsoft Soundmapper - Output 1. AudioDevice on USB Bus 2. SoundMAX Digital Audio 3. ASIO DirectX Full Duplex Driver 4. ASIO Multimedia Driver 5. GIGAPort AG ASIO driver API number 4 The only time it works is when I´m writing -asio -audiooutdev 2 (weirdly enough, to me it seems as AudioDevice on USB Bus is on 1, but the "0" counts as the first..) -outchannels 2, then I get 2 channels only. When I´m trying to write more than 2 channels, or when I´m trying to start audiooutdev 6 (GIGAPort AG ASIO driver), nothing works. It´s nothing wrong with the card, as it is working in other applications. I searched for the problem in other places, and I found one interesting thing, here is what another guy on a forum writes (it is not specifically about PD, I skip some unimportant parts, but you get my point..): ----------------------------------------- "I bought a gigaport AG to use with my laptop. It's a USB to 8 channel analog device. I could not get it to work with Mixmeister. I could only get 2 of the 8 channels of the gigaport to work. I posted this question on the ESI Forum (Gigaport manufacturer.........So, I installed Gigaport per the directions. It uses ASIO 2.0 Drivers V2.61. Mixmeister only sees "Gigaport AG" in the audio output selection boxes, as opposed to 8 virtual outputs (4 stereo)...........It only works from outputs 1 and 2, but nothing else. Is the gigaport 'application sensitive', in other words, somehow Mixmeister have to support it? Any suggestions? And here was their reply: GIGAPort AG can send out 8 audio channels ... - with applications supporting ASIO when our ASIO driver is installed (= 1 ASIO device for all 8 channels) - with applications supporting multichannel MME (WDM) when our ASIO driver is not installed (= 1 wave device for all 8 channels) GIGAPort AG does not provide separate MME devices as often used by older Windows 9x/Me compatible audio applications. In case such applications are used, only 2 channel playback is possible and it would be wise to check if there is an update of the software available that either supports multichannel MME devices according to the WDM standard from Microsoft or -even better- ASIO." --------------------------------------- I hope someone could confirm that the Gigaport doesnt work with PD, so I can find some other solution. Thank you very much/ Simon (Mr Pony).

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Re: [PD] Zero delay feedback, with settable send?
by Kim Taylor 12 May '07

12 May '07

> You cannot get a zero-size feedback delay in Pd at all, regardless of > subpatch ordering or creation order. The subpatch-stuff only is valid > for non-feedback connections. The best you can do is do a [block~ 1] > or [block~ 8] Sorry, I forgot to mention that I used [block~ 1] objects within the throw and catch modules. I found that the creation order was important though: The patch wouldn't work unless I instantiated the abstraction with 'catch~' in first- I guess because data cannot be 'thrown' to a bus without it existing first... K

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Re: [PD] Zero delay feedback, with settable send?
by Kim Taylor 12 May '07

12 May '07

> > I have had success using throw~ and catch~, as the destination bus can > > be changed by setting throw~, BUT- throw and catch use a minimum block > > size of 64. > > Hm? They don't, unless you do feedbacks, but then everyhting~ in Pd > has a delay of one block. How true, I must have overlooked this... Fantastic news Thanks K

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Pd-list May 2007