[PD] gem - feedback & perspective
hi there, i'm stuck with a problem that really drives me nuts: i have a fairly complex 3d scene. my aim is to take a snapshot of a part of this scene via pix_snap2tex, render this texture on a rectangle that covers exactly the same area where the snapshot has been taken and do this over and over again to create trails of objects moving over this part of the scene. now, no matter what i do, the positions of the moving objects and their representations in the snapshots are always slightly off. as a result, the trails are not what they are supposed to be - they tend to vanish in the middle of the snapshot, instead of representing the motion of the moving objects. everything is perfectly fine when doing the same thing with just a single [rectangle 5.3 4] filling the whole screen, so it works in principle. but i do need to have other parts of the scene visible as well ... i guess that OpenGL's perspective calculations are kicking in here - is there any way of preventing this? i extensively played around to get this straight: among other things, i tried [ortho], another attempt was to make the single rectangle partly transparent with [alpha], but none of these ideas worked. i greatly appreciate any help - thank you, thoralf. ___ New Yahoo! Mail is the ultimate force in competitive emailing. Find out more at the Yahoo! Mail Championships. Plus: play games and win prizes. http://uk.rd.yahoo.com/evt=44106/*http://mail.yahoo.net/uk ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
[PD] RE: [GEM-dev] Re: pix_video and dv1394 capture on Edgy
hi ivica/all, --- Ivica Ico Bukvic <[EMAIL PROTECTED]> wrote: > Based on my tests I am suspecting that this is a > lib/distro-independent > issue, and as such am also wondering what will > happen with pd/gem on Linux > in 6 months when most of the other distros pump out > their next release with > libs similar to Edgy (maybe some of them already > are?) leaving gem video for hey, this prophecy became true here on gentoo yesterday: same symptoms as you described, dv input hardly worked at all: doing the driver 1 / open /dev/1394 magic made it work sometimes, altough the chroma and luma planes were appearantly swapped (red became blue and vice versa, pix_colormatrix with a 0 0 1 0 1 0 1 0 0 matrix corrected this). today i re-compiled gem from cvs, and now it doesn't work at all :-( i had the idea to frameserve video into gem, but that concept doesn't seem to exist on linux yet. both ffmpeg and dvgrab are able to output to a pipe, but that doesn't help very much in this case. hopefully avisynth 3 will become usable soon, making gem gstreamer-aware might also be a good idea ... I've read that you also tried vloopback, have you had any success with this? with kind regards, thoralf. ___ New Yahoo! Mail is the ultimate force in competitive emailing. Find out more at the Yahoo! Mail Championships. Plus: play games and win prizes. http://uk.rd.yahoo.com/evt=44106/*http://mail.yahoo.net/uk ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] gem - feedback & perspective
hi erich, --- Erich Berger <[EMAIL PROTECTED]> wrote: > why - i dont know - and was also back then not > answerd. thank you ... i got it to work by grabbing the whole gemwin with pix_snap rather than pix_snap2tex, applying an pix_alpha to make any black pixels in the snapshot transparent and texturing on a full-screen rectangle afterwards. however, due to its high ressource consumption, this workaround is almost good for nothing :-( with kind regards, thoralf. ___ Now you can scan emails quickly with a reading pane. Get the new Yahoo! Mail. http://uk.docs.yahoo.com/nowyoucan.html ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
[PD] RE: [GEM-dev] Re: pix_video and dv1394 capture on linux
hi ivica, > one. The solution actually > is quite simple: not in my case, unfortunately. i cannot get the dv cam to deliver any frames at all right now. sending |device /dev/raw1394( to pix_video only gives [pix_videoNEW]: device-err: 0 DV4L: closed in the pd window and initializing: Invalid argument on the console. dvgrab and kino are working fine. since v4l input seems to be way less problematic, i'm thinking about looping /dev/raw1394 to a v4l device with vloopback - but you wrote that didn't work either. vloopback is also not maintained anymore, so this would probably be only a temporarily solution ... thanks, thoralf. ___ All New Yahoo! Mail Tired of unwanted email come-ons? Let our SpamGuard protect you. http://uk.docs.yahoo.com/nowyoucan.html ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
[PD] RE: [GEM-dev] Re: pix_video and dv1394 capture on linux
hi ivica, --- Ivica Ico Bukvic <[EMAIL PROTECTED]> wrote: > Did you select the right device? man, you're right ... /dev/dv1394/0 is the one to use. sorry for the noise, thoralf. ___ Yahoo! Messenger - with free PC-PC calling and photo sharing. http://uk.messenger.yahoo.com ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] gem - feedback & perspective
hi, just realised that anti-aliasing settings also tend to interfere with feedback: enabling any sort of anti-aliasing via |FSAA x( fscks up clean feedback on my geforce 5700 with the 1.0.8776 driver blob. with kind regards, thoralf. ___ What kind of emailer are you? Find out today - get a free analysis of your email personality. Take the quiz at the Yahoo! Mail Championship. http://uk.rd.yahoo.com/evt=44106/*http://mail.yahoo.net/uk ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
[PD] gem: framerate / quality of pix_video with dv and linux
hi there, when capturing dv with the linux version of gem's pix_video, this object emits frames about every 1/10th of a second only, no matter what framerate gem is running at. when using an usb camera, the behaviour of pix_video is as expected: it delivers one frame with every render cycle. this is a bit less-than-ideal from my point of view, since fast movements won't be continously anymore. is there any way of changing this behaviour? also, while we are at it: the resulting images are really blocky sometimes, especially when capturing motion. it looks like some parts of the image consist of another frame than the rest of the image ... this issue does not exist when capturing dv with dvgrab or kino. while working on this, i found myself craving for the windows version of pix_video: not only do these ugly blocks not appear, it is also possible to change the resolution of the captured video with messages (dv res xxx, iirc). this becomes important when doing other stuff besides capturing video: pix_video and the according pix_texture take up about 50% on my computer :-( thre is indeed a quality-message, but this one doesn't seem to affect the resolution of the captured frames, only their overall quality. with kind regards, thoralf. ___ New Yahoo! Mail is the ultimate force in competitive emailing. Find out more at the Yahoo! Mail Championships. Plus: play games and win prizes. http://uk.rd.yahoo.com/evt=44106/*http://mail.yahoo.net/uk ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] Mplayer video into PDP/Gem
hi thomas, > is there a way to route the video output of mplayer > (or any other oss > available for Linux) into Pd via PDP or Gem? AFAIK there used to be a patch that made mplayer aware of vloopback-devices (http://www.lavrsen.dk/twiki/bin/view/Motion/VideoFourLinuxLoopbackDevice) - maybe that's what you are looking for. however, you should note that vloopback is video4linux (which seems to be deprecated by now). furthermore, it seems to be abandonware. another option could be named pipes, but i never got those working, either. hope this helps, thoralf. ___ What kind of emailer are you? Find out today - get a free analysis of your email personality. Take the quiz at the Yahoo! Mail Championship. http://uk.rd.yahoo.com/evt=44106/*http://mail.yahoo.net/uk ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
