tallycom

Poll

Headsets mit button sind schwer zu finden / teuer

Schalter an Stativ muss jedes mal fest gemacht werden

Attach the button fixed to the tripod handle (endcap to leave room for zoom buttons on handle itself?) and connect it to the tally using connectors (something robust). Connecting button to the tally is a problem for each “solution”. (Bix)

Fussschalter brauch platz im case

TODOs

find better headsets (Im besten Fall geschloßen, mit stark gerichtetem Mikrophon und nur einer Ohrmuschel.)

find PTT buttons to be mounted on the tripod handle

Hardware

The current hardware is a Raspberry Pi 3, we need evaluate if the intercom part also works stable with an older pi.

1x RPI 3 ca 35€

1x RPI Case and power suppply + flash mount 10-20€

2x USB headset 50€ i.g. https://www.amazon.de/Logitech-960-Stereo-Headset-USB/dp/B0013N474I/

1x SD Card ~10€

1x LED + Resistor ~2€ (for voctolight)

~ 110€ per room

As alternative an orange pi zero or a nano pi could be used.

The pi can either use its build in wifi with the a wifi provided by the wrt or in case of congress could also use the WPA2-enterprise network.Alternative ethernet can be used

prototype alpha

5V from cam power supply for tallycom

Our JVC Cams run on 12V and the Panasonic on 7,5V, therefore we have a step-down converter which provides 5V for the tallycom.We use a LM2596S DC-DC stepdown converter which has an input voltage range from 1,5 - 35V and can provide up to 3A.This should work with most other cams to as long as you are not to close to 5V.

Software

voctolight

voctolight is a tellylight part of this project.It listens on the voctomix control channel.

The code is developed in the voctomix repository in the exemple scripts dir.

To get started you need a LED and a resistor. For a normal red LED this would be 330Ohm.Connect the LED with its + to pin 11 and with its - to GND (pin 6)

setup:

ssh voc@10.73.1.15
cd /opt/voctomix/release/example-scripts/voctolight/
vim config.ini
sudo systemctl restart voctolight.service

voctocom

To get a audio connection between mixer and camera operator we run a command line mumble client on an rasperrypi 2/3 connected to an USB Headset. For small events, this client connects to a mumble server on the voctogui laptop (or the cube / minion); for bigger event to, a central one running in the server case.Another option would be SIP, but mumble seems to better fit the requirements.

The mixer operator should be able to use push to talk with the keyboard of the mixer or an button in the UI. The camera operators should be able to use the button on the headset for push to talk.

It could be useful to let the mixer operator to switch the behavior of all clients to open mic.

Taliepi

c.f. https://github.com/dchote/talkiepi and https://github.com/dchote/talkiepi/tree/master/doc

To change the configuration edit /etc/systemd/system/mumble.service

TODO: check/fix systemd unit – workaround: run manually inside of screen

Does not

Setup

see https://github.com/dchote/talkiepi/tree/master/doc

You need to edit /usr/share/alsa/alsa.conf and change defaults.ctl.card 1 and defaults.pcm.card 1

barnard

This is based on a RasPi 3 and Raspian:

First, create /etc/asound.conf with the following contents:

pcm.!default {
type plug
slave.pcm {
@func getenv
vars [ ALSAPCM ]
default "hw:Headset"
}
}

This will map the Headset to be the default sink/source for audio. This app is written in Go, so we need to install go first, plus a few dependencies written in C, which we pull in via APT. They handle sound and opus encoding respectively:

cd ~
# Get golang for ARM: https://golang.org/dl/ (get go?.?.?.linux-armv6l.tar.gz)
tar xvfz go?.?.?.linux-armv6l.tar.gz
apt install libopus-dev libopenal-dev
export GOPATH=$HOME/gocode

Next, we can build barnard, a gui-based client, that you may want to run in a screen session for production purposes.

~/go/bin/go get github.com/layeh/barnard
~/go/bin/go compile github.com/layeh/barnard #set GOARM=7 to get ARMv7-optimized code
strip ~/gocode/gocode/src/github.com/layeh/barnard/main
sudo cp ~/gocode/gocode/src/github.com/layeh/barnard/main /usr/local/bin/barnard
# (exported.pem is the cert exported from the official mumble client as exported.p12,
# and then run thrugh "openssl pkcs12 -in ~/exported.p12 -out ~/exported.pem -nodes"
barnard server="mumble.server.example.net:64738" -username=cam1 -insecure=true -certificate=exported.pem

GUI shortcuts: F1 mutes/unmutes on a protocol level, F10 quits.