Вярнуцца да пачатку

Spell Time Alpha

  • AV Installation
  • 2201 Праглядаў
  • Падабаецца
Spell Time Alpha
[Тэкст даступны толькі на англійскай мове] As beeing powered by Corona, I had time to develop things in the time of the pandemic.

Spell Time Alpha is an interactive Videoinstallation with multi-AV output, that transforms words into video clips to spell them letter by letter. As it is a skeleton system, everything is scalable from input to output. If there is no interactivity, the many independent AV channels loose sync after a while and give the installation the impression of a babbling choir. The showed content will be locally extended all the time in a system to record the videoclips with fresh faces of the venue in a light box.

The face and setup you see in the picture is meant as demo content I made to give an idea of Spell Time Alpha's possibilities.

The advanced input options developed by now range from speech recognition with selected old analog phones, over handwritten text-recognition, throughout reading twitter messages by hashtag.

Customization for an exhibition topic is intended. Multiple types of locally available displays might be used also in the installation. It's flexible.


Technologies that have been used:

Linux, Windows, RouterOS, Raspberry Pi, vvvv, ffmpeg, mpv, Avahi/Bonjour, NFS, Asterisk, Kaldi, Twarc, Sane, Tesseract OCR, Socat, Oracle Virtualbox.

The parts of the Spell Time Alpha Installation are developed in diverse environments.

To drive the displays Rasperry Pis with Linux and the mpv player are used. The controller for it has been developed in vvvv on Windows. Likewise the recorder logic, which additionally uses ffmpeg to record the videos.

The recording box consist of a big lightbox to sit in, a footswitch for controlling, a HDMI camera with directional mic and a preview screen to show the output of vvvv.

All already developed input options run on Linux with the use of tools, bash-scripting and socat, as the storage server does also. The controller is hosted in a VM on the Linux machine too. The Players announce themselves on the network with Zeroconf technology and have no fixed adress.

To maintain mobility for everything laptops have been used.

The network to connect everything uses gigabit technology, several dumb switches and a router from Mikrotik.

All system components can be adapted and extended in terms of numbers and data throughput.

Працягласць (хвілін)


Што трэба

For the Recording-Studio:
I need a closed room to place the lighbox, as it is fragile and the person that acts in front of the camera needs silence. Here also Power, a Table, a high place to put the preview monitor on.

For the Displays:
As it's flexible we will find screens to reuse, and additionally desks, boxes or other places to put them.

This means I am in need of all TVs and HDMI/DVI to be found with accessible AV input. Then I will see how and where to put them.

Right now, I can drive up to 11 screens. More of them with more Raspberry Pis and SD-Cards, if we find. VGA only screens dont work.

Power needs: I have Siemens/Schuko/CEE 7/4/Type F plugs. Also many multiplugs like that for the screens.

Што мастакі прыносяць

I will bring all the special things that are needed to run the infrastructure: Server, Controller, Players, Input devices, Networking. Plus cabeling for A/V, network and power.

Except TVs and Monitors, these we have to find locally.

  • AV Installation


Tim Vis
Tim Vis

Germany Heidelberg


LPM 2021 Apulia
LPM 2021 Apulia
26 // 29 жніўня 2021