project:presentationcenter:start
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project:presentationcenter [2013/06/26 11:01] – [Analog Mixer] kxt | project:presentationcenter:start [2016/11/28 02:03] – ruza | ||
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+ | ====== Presentation Center ====== | ||
+ | {{template> | ||
+ | name=Presentation Center| | ||
+ | image=dummy_project_icon.png? | ||
+ | founder=[[user: | ||
+ | interested=[[user: | ||
+ | status=active}} | ||
+ | |||
+ | ~~META: | ||
+ | status = active | ||
+ | & | ||
+ | ~~ | ||
+ | |||
+ | Presentation center setup in the big room that is easy and comfy to use - with direct A/V output to the sound system/ | ||
+ | |||
+ | ===== Status ===== | ||
+ | |||
+ | * [DONE] We have set up a brmvid.brm computer in the large room dedicated for this purpose. | ||
+ | * [DONE] We have streaming setup ready and activated/ | ||
+ | * [IN PROGRESS] Seamless Powerpoint/ | ||
+ | * [IN PROGRESS] Easy recording + streamlined postprocessing (long videos to data storage, short videos to youtube) | ||
+ | |||
+ | ===== How To Use ===== | ||
+ | |||
+ | ==== Streaming using Magic Button™ ==== | ||
+ | |||
+ | * You will find the camera somewhere near brmvid. | ||
+ | * Put the camera out there, make sure it's connected to the computer (FireWire on the LCD side). | ||
+ | * We have to reset it, because the firmware freezes: | ||
+ | * Turn camera OFF (silver round switch). | ||
+ | * Disconnect the power supply. | ||
+ | * Wait ~10 secs. | ||
+ | * Connect the power supply | ||
+ | * Turn the camera to AUTO mode. | ||
+ | * Flip stream switch (white with orange LED) on [[project: | ||
+ | * Point your browser to http:// | ||
+ | |||
+ | ==== Manual streaming using VLC (usually for debugging) ==== | ||
+ | |||
+ | FFserver seems to be a bit unstable, so we decided to try VLC. Connect camera to brmvid, turn it to AUTO mode and run | ||
+ | |||
+ | < | ||
+ | --audio-filter=normalize : | ||
+ | "# | ||
+ | duplicate{dst=http{mux=ffmpeg{mux=flv}, | ||
+ | , | ||
+ | |||
+ | And then point your browser to https:// | ||
+ | |||
+ | Technical background: see / | ||
+ | |||
+ | ==== Restreaming using VLC ==== | ||
+ | |||
+ | Because of broken multicast in current internet implementation :) with a 600 kb/s stream and our 15 Mb/s line we can handle about two dozens of clients. | ||
+ | However, for example with [[event: | ||
+ | |||
+ | Therefore, if you have a server with good connectivity, | ||
+ | |||
+ | < | ||
+ | | ||
+ | or with stream dumping | ||
+ | < | ||
+ | {dst=/ | ||
+ | | ||
+ | |||
+ | There will be probably restream at http:// | ||
+ | |||
+ | Restreaming with retry: | ||
+ | |||
+ | <code bash> | ||
+ | cvlc -L --sout "# | ||
+ | | ||
+ | </ | ||
+ | |||
+ | ==== Higher quality recording with wireless microphone ==== | ||
+ | |||
+ | Wireless port by [[user: | ||
+ | |||
+ | You will find the transceiver in the box under the plotter. | ||
+ | |||
+ | Settings that seem to be good: | ||
+ | |||
+ | * Tx microphone sensitivity: | ||
+ | * Rx AF Out -6 dB | ||
+ | * ALSA input on brmvid 100 % | ||
+ | |||
+ | < | ||
+ | |||
+ | Try it: | ||
+ | < | ||
+ | |||
+ | Muxing with ffmpeg: | ||
+ | < | ||
+ | -vcodec mpeg4 -acodec libmp3lame -b:v 2000k -b:a 192k -y - |\ | ||
+ | tee / | ||
+ | | ||
+ | : | ||
+ | , | ||
+ | Trolling :-) | ||
+ | < | ||
+ | |||
+ | ==== Streaming using DVSwitch ==== | ||
+ | |||
+ | DVSwtich allows you to alter the stream on-the-fly, switch audio (integrated microphone/ | ||
+ | |||
+ | To start streaming using DVSwitch, run the dvsw.sh script in brmlab user home. It will open dvswitch UI and setup some sources (camera, brmlab logo and microport). You can switch them in the GUI. | ||
+ | |||
+ | To kill all these things, run kill_sw.sh. | ||
+ | |||
+ | ==== Streaming the screen ==== | ||
+ | |||
+ | < | ||
+ | | dvsource-file -h 192.168.77.30 -p 5024 / | ||
+ | |||
+ | ==== Recording, postprocessing and publishing ==== | ||
+ | |||
+ | Stream is automatically dumped to brmvid:/ | ||
+ | < | ||
+ | or | ||
+ | < | ||
+ | </ | ||
+ | where -ss is position in recording where to start and -t is the duration (end_pos - start_pos). | ||
+ | |||
+ | ===== Analog Mixer ===== | ||
+ | |||
+ | We have [[http:// | ||
+ | |||
+ | {{: | ||
+ | |||
+ | So basically that means 4x mono inputs (XLR+TRS) and 4x stereo inputs (TRS) or 6x stereo inputs (2x XLR+TRS, 4x TRS). All inputs have equalizer corrections, | ||
+ | ===== Light Control ===== | ||
+ | |||
+ | Reflectors are installed in front of the room, controllable by the artnet protocol. E.g. install libartnet and artnet-examples (http:// | ||
+ | |||
+ | Channel assignment: | ||
+ | * 01-04 Dimmer (01 halogen, others unused) | ||
+ | * 08-09 Stroboscope (08 frequency, 09 power) | ||
+ | * 16-21 ADJ Par 1 | ||
+ | * 32-37 ADJ Par 2 | ||
+ | * 40-43 RGB dimmer 1 | ||
+ | * 50-53 RGB dimmer 2 | ||
+ | |||
+ | Example: | ||
+ | * artnet_setdmx -c 1 -d 80 | ||
+ | |||
+ | ===== Future Ideas ===== | ||
+ | |||
+ | ==== Digital Whiteboard ==== | ||
+ | Something like multitouch ([[project: | ||
+ | |||
+ | To allow wiimote input to the computer, we just need to get a USB bluetooth dongle AIUI. | ||
+ | |||
+ | ==== BrmReport ==== | ||
+ | Fancy software to allow extremely easy and fast online reports of whatever cool you have done in brmlab. Right now, barely anyone bothers tweeting and souping stuff because it's so tedious process to log on, click at a lot of stuff etc. You should be able to pop a window open, take a picture on your cellphone/ | ||
+ | |||
+ | ==== Presentation tips ==== | ||
+ | |||
+ | [[http:// |
project/presentationcenter/start.txt · Last modified: 2017/06/01 22:26 by ruza