These are materials from a lecture about realtime audio and video programming (using GEM and Pure Data) at the University of Applied Science, FH Joanneum, for the master programme Media and Interaction Design.
All patches and media files are attached to this post. Most of the files are not made by myself - main credits go to Derek Holzer, Aymeric Mansoux, IOhannes m Zmölnig, Max Neupert and Cyrille Henry - I added additional patches and modifications.
CONTENTS
General PD Introduction
Files in the directory 01.pd-control:
- 01.basics: hot, cold inlets; order of operations
- 02.events_over_time: counters, delays, lines, sequencer example
- 03.math_and_logic_operations: conditional tests, arithmetic, random
- 04.subpatches_and_abstractions: subpatches, send/receive, abstractions
GEM Introduction
Files in the directory 03.gem:
- 01.basics: gemwin, Geos
- 03.texture_processing: textures, gain, combination of images, pix effects
- 04.video: pix_film, perspective, video mixer, camera input, video effects
- 05.muppet_show/showcase: 3D objects in 03.army_of_buddies.pd + 04.singalong.pd
Audio Introduction
Files in the directory 02.pd-audio:
- general infos about digital audio
- simple audio generators and modulators
- samplers
- filters, effects and FFT
- pitch and beat detection
Motion Detection and Tracking
Files in the directory 03.gem/06.tracking:
- 01-02: movement extraction with pix_delay and pix_movement
- 03-04: motion tracking and movement detection with pix_blob
- 05: motion tracking by comparing to a static background
- 06: tracking with fiducial markers from the reacTIVision project (as used in the reacTable), the markers are also included (see fiducials.pdf)
- more advanced tracking, object recognition, face detection, ...: algorithms are available through the OpenCV library - see OpenCV in PureData
FURTHER MATERIALS
- Download the software for your operation system at http://puredata.info/downloads, or for the latest development version use http://autobuild.puredata.info/auto-build/
- Go through the patches which come with Pd: Help -> Browser -> Manuals: here you will find Intro, Sound, Image (GEM), ...
- Use Pd's help: right click -> Help on any object should give you the documentation for this object, right click -> Help on an empty patch shows you a list of all internal Pd objects
- Further documentation and tutorials can be found at http://puredata.info/docs
- Special documentation and info for GEM is at http://gem.iem.at/documentation/ and go through the patches in 04.gem-advanced
- Ask any kind of questions at the Pd mailinglist, the main communication channel for Pure Data: http://lists.puredata.info/listinfo/pd-list (english)
- Become a member of the local pd~graz Verein (http://pd-graz.mur.at) and discuss your ideas/problems - we also have a mailing list in german at http://lists.mur.at/mailman/listinfo/pd-graz
| Attachment | Size |
|---|---|
| PdJoanneumLecture.zip | 26.88 MB |

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