Video Team Hardware

Work In Progress

Kit list per talk room

Audio

2x Headset Radio Mic
2x Hand-held Radio Mic (omnidirectional, because people hold them the wrong way)
2x Mic Stands (Good for getting people to queue up to ask questions - use with hand-held mics)
4x 2m XLR cable (mic receiver to snake)

• Radio Mics need to be licence free in all 3 ITU regions
• We need to be able to change frequency to avoid interference with other users
• Radio Mics are a minefield regarding licence and available frequencies we can use, the licence exempt spectrum (not 2.4GHz/5GHz) is not wide enough and does not permit more than 2 mics to be used.
• We should purchase only 1 room worth of kit NOW and re-examine later...

Tasks:

1. Identify suitable radio mic systems (farm off to QAV)
   • Possible Open Hardware project?

   • https://www.shure.com.cn/dmsfiles/default/shure/support_downloads/frequencies/pdf_quides/Shure-Wireless-Freq-Guide---Nov-2011-0917b7e02b1d85068f3e3326b985b04e.pdf

   • applies to UK

2x Ambient Mic (pick up audience chatter / shout out questions)
2x Microphone stand (for ambient mics)
2x 20m XLR cable (to run from ambient mic to desk)

1x 5m 3.5mm stereo Jack to 2x 1/4" mono jacks (PC Audio to DI Box)
1x stereo DI box (2x 1/4" socket In to 2x XLR-M) active / phantom powered (PC audio)
2x 2m XLR cable (DI to snake)

1x 25m Mic 'snake' reel - 6 in 2 out

• http://www.ebay.co.uk/p/xlr-multicore-6-2-way-25m-drum-stagebox-stage-snake-pa-band-stage-theatre/1040025707?_trksid=p2047675.l2644 or similar

1x 8 channel mixing desk

• Requires minimum 8 XLR input channels
• Requires main and aux outputs (I am going to assume XLR for both of these - for this shopping list)
• main XLR goes to Main Camera
• Aux Send goes to house PA (preferably as a slide fader)

• https://www.amazon.co.uk/Behringer-X2442USB-Xenyx-Input-Mixer/dp/B0037036QA/ref=sr_1_1?ie=UTF8&qid=1479550944&sr=8-1&keywords=x2442usb

• https://www.amazon.co.uk/Behringer-UB2442FX-PRO-UB2442FX-Pro-Mixer/dp/B000CCS3U0/ref=sr_1_10?ie=UTF8&qid=1479480226&sr=8-10&keywords=sound+mixer looks good

2x 5m XLR cable mixing desk to Main camera
2x 20m XLR cable mixing desk to PA (potentially via snake)

1x Balanced to unbalanced stereo balun transformer (XLR-F in to 1/4" Socket Out)
2x 2m 1/4" Mono Jack to Jack
1x 2m 1/4" Mono Jack to stereo 3.5mm jack
1x 2m 1/4" Mono Jack to RCA phono plug
1x 3.5mm Socket to 1/4" mono jack adapter

Camera

• DSLR sounds nice nut are not suitable for our application because we need units to run for long periods (DSLRs can't keep the CCD cool enough for continuous operation)
• We are using SDI as our video interface and really DO NOT want to use adapters.
• Camera will be used indoors (low light)
• Optical zoom for head shots at 25m away
• XLR Audio Input

• Camera cable. SDI cable on a reusable reel something like:
  

http://www.ebay.co.uk/itm/3x-CABLE-DRUM-ROLLER-REEL-HEAVY-DUTY-SPOOL-STEEL-FRAME-HANDLE-SET-EMPTY-BLACK-/282208316457?hash=item41b4ed2c29:g:pIYAAOSw4shX9P-x

• Possibly run Ethernet alongside?
• Cable needs to be very flexible and suitable for 'hard' re-use (i.e. multiple install / un-install, across floors etc)

Opsis: Presentation capture

• Opsis FPGA Video to USB
• 1U case

• ?MinnowBoard Turbot (Micro PC)

  • http://wiki.minnowboard.org/MinnowBoard_Turbot

  • Works well - confirmed at Video Team Sprint Paris 2016-11-18
• Small SSD

  • https://www.scan.co.uk/products/120gb-sandisk-z410-25-ssd-sata-iii-6gb-s-slc-tlc-read-540mb-s-write-405mb-s-35k-55k-iops - or similar

Tasks:

1. Confirm that the Turbot is a suitable PC system Done - works fine
2. Update to fanless PSU
3. mount into 1U case with the following connection setup
   1. Connection to outside world
      1. Common
         • IEC power
         • Power Switch
         • LED from nRST of OPSIS
      2. Opsis
         • HDMI IN (from Presentation laptop)
         • HDMI Out (to Projector)
         • HDMI Out (to confidence screen)
         • Reset (+remote from minno board)

      3. ?MinnowBoard

         • Ethernet (to Mixer PC)
         • USB sockets 1 (or 2 if available)
         • Reset

         • GPIO out from ?MinnowBoard to LED

   2. Connections internally
      • Power switch to power supply

      • Power supply to ?MinnowBoard (& SSD)

      • Power supply to Opsis VIA GPIO Controlled Relay from ?MinnowBoard

      • HDMI Out from ?MinnowBoard to Opsis

      • JTAG from ?MinnowBoard to Opsis

      • GPIO out from ?MinnowBoard to relay to power sequence Opsis

      • GPIO out from ?MinnowBoard to relay to switch P18 / K2 (DPDT)

Video Mix PC

• PC Able to host video mixing for 1 room
• For single room events (i.e. a miniconf) this is the only PC needed on site
• Vocto Mix video mixer software
• 2x Black Magic SDI Capture Cards
• 2x NIC (1GBit/s)
• current generation i7
• 16 GB RAM
• 120GB SSD - System
• 2 x 3TB HDD (Mirrored)
• Silent (at least very quite fans)
• 4U Rack Case NOT to be shipped for miniconf (local miniconf team can supply this!) We ship this as a single case for debconf (n x Talkrooms + 1)
• Keyboard
• Mouse
• Monitor

Kit list VideoTeam Operations Room

Video Master PC

• Video Master PC is used during debconf only. It is responsible for:
• local backup
• local ICEcast Master
• local vypar
• Gate way for Talk rooms
• Same HW as Talk room PC but with 4x3TB spinning disks and 32GB RAM
• Packet Switch