Motivation, History

• illustration of abstract concepts from math/physics/chemistry
• writing educational computer animations started about 20 years back
• all recordings were made live in the lecture hall in 2021/2022 winter's and summer's term (except animations Pinball, Spin Sorting Maching, Double Slit Experiment)
• video recording was initiated due to corona pandemia

Hardware

• recording
• laptop, (4 cores, 32 GByte RAM, made in 2015)
• 4K consumer camera
• wireless mic-headset
• audio AD-converter
• production
• desktop PC (10 cores, 32 GByte RAM, made in 2021)

Software

• foils
• TeX
• beamer (see also here)
• tikz (see also here)
• xfig
• gnuplot
• graphviz
• diag2ps
• computer animations
• own developments for education, using
• C++ (std=c++17, partially c++20 (concepts))
• gcc 11
• gmake
• git (initially subversion)
• unix tools
• nedit, kwrite, ctags (no IDE)
• used libraries
• gcc's libstdc++, STL (see also here), filesystem
• pthread, OMP, libtbb
• X11
• Qt
• OpenGL, freeGLUT
• mkl, aocl
• BLAS, LAPACK
• convolution, cross correlation, Fourier transformation
• vector math
• GSL (numerical integration, non-linear equation solvers)
• GMP (rational and arbitrary precision numbers)
• boost (ublas, random numbers, template meta programming, rational and arbitrary precision)
• liboctave
• libpng, libasound
• liblzma, libzstd
• fftw3
• marching cube algorithm
• audacity, jaaa (sound editor and realtime 1D Fourier transformation in excursion on music)
• vis5d (animated electromagnetic wave)
• video/audio processing
• Recording
• ffmpeg (laptop screen)
• jack (audio from AD-Converter)
• Preprocessing
• video
• mplayer (slightly modified to assist handmade selection of regions from 4K material to zoom to active part of board)
• ffmpeg (x265 compression, selection, overlay, blending, concatenation of scenes)
• scripting (generation of ffmpeg filter complexes)
• audio
• C++ (vocal filter, cross corellation to camera audio recording => detect shift and jitter)
• sox (noise gate, compressor, resampling from 48kHz to 41kHz (from camera), adapt jitter)
• lame (mp3 compression)
• cut
• kdenlive
• postprocessing
• ffmpeg (higher x264/YUV420 compression for web publication, mp4 container)
• video collages
• ffmpeg
• scripting (generation of ffmpeg filter complexes)
• web page generation (HTML and CSS only)
• scripting
• miscellanous
• Eigen3 (experimental module)
• gimp (collages of still images)
• povray (non-realtime high quality 3D rendering)

general scripting: perl, regex (see also here), bash, awk (see also here), sed (see also here), unix command line tools

Acknowledgements to free and open source software projects, particularly: Linux