Numm installation and usage
numm is a python library – the bastard child of Processing.org and MATLAB, if you will – that fuses python, numpy, and gstreamer together to create a numerical-computing environment for multimedia generation, analysis, and interaction.
A Debian package is provided for ease of installation on Debian and derivative operating systems, such as Ubuntu; we recommend you abandon alternative systems and install Debian, but in the interim direct your attention to virtualization software such as VirtualBox.
Numm is available as a package in Debian and Ubuntu:
% sudo apt-get install python-numm
At its simplest, numm provides three pairs of invertable functions that connect common media formats with numpy:
Images represented as (height, width, color) numpy.uint8 arrays.
image2np(path) \(-> np
Sounds as (frames, channels) numpy.int16s
sound2np(path) \(-> np
Videos as (frames, height, width, color) numpy.uint8s
video2np(path) \(-> np
Additionally, iterators are provided for incremental loading of media files:
sound_chunks(path) \(-> np iterator
video_frames(path) \(-> np iterator (by frame)
For rapid-prototyping of interactive numpy-based audio-visual experiments, the numm package has a real-time mode. The numm package installs a program named numm-run, which launches (and reloads on modification) python scripts that may implement any subset of the following functions, which are asynchronously called as needed:
video_in(a) # webcam
video_out(a) # mutate a in-place to set video
audio_in(a) # mic
audio_out(a) # mutate a for audio output
mouse_in(type, px, py, button)
numm-run(1), numm.one-bit-instrument(7), numm.spectral-analysis(7)