distributed-conference

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision		 Previous revision
distributed-conference [2020/12/01 23:07] – [Table] no_maamdistributed-conference [2020/12/16 20:46] (current) – [OBS Operation] andi
Line 5: Line 5:
 The setup below also works with commercial streaming service like YouTube or self hosted solution. This means it can be used without any dependencies on VOC infrastructure. One can also (at least on linux and windows) use it with telco services like jistsi, NextCloud Talk or Zoom, Skype,... (more on that under Fake Webcam).   The setup below also works with commercial streaming service like YouTube or self hosted solution. This means it can be used without any dependencies on VOC infrastructure. One can also (at least on linux and windows) use it with telco services like jistsi, NextCloud Talk or Zoom, Skype,... (more on that under Fake Webcam).  
  
-== Basic setup for Speakers+== Basic setup for speakers
 For an optimal setup a speaker needs two screens. The speaker should position one screen at the same height as the camera, close to or below it. This screen should display the slides. This way the speaker, looking at their slides and notes, will also look at the camera. For an optimal setup a speaker needs two screens. The speaker should position one screen at the same height as the camera, close to or below it. This screen should display the slides. This way the speaker, looking at their slides and notes, will also look at the camera.
      
Line 19: Line 19:
  
 The following sections describe some of the finer points of your new "studio" skip those that are not relevant to you. You find a summary in the section "Your Studio". The following sections describe some of the finer points of your new "studio" skip those that are not relevant to you. You find a summary in the section "Your Studio".
 +
 ==== Improving video and audio quality ==== Improving video and audio quality
 {{:telcocam.jpg?200 |}} {{:telcocam.jpg?200 |}}
 +
 Here are some hints to improve the audience experience or work around missing hardware parts: Here are some hints to improve the audience experience or work around missing hardware parts:
   * **Camera**   * **Camera**
Line 46: Line 48:
  
 === Recommended Hardware === Recommended Hardware
-==== Webcams with Decent Quality+ 
 +==== Webcams with decent quality
 Webcams nowadays usually come with a built-in microphone. This is usually a step up compared with laptop microphones / cameras. Webcams nowadays usually come with a built-in microphone. This is usually a step up compared with laptop microphones / cameras.
 Some webcams can output the video already in H.264/H.265 compressed, JPEG compressed or RAW video format.   Some webcams can output the video already in H.264/H.265 compressed, JPEG compressed or RAW video format.  
Line 92: Line 95:
 | Sony          | Alpha 6600               | Micro-HDMI       | ?                           | 3.5 mm microphone in and monitor out  | Yes [1]       | 3840 × 2160 (UHD 1) 30 fps / 1920x1080 (FullHD) 60 fps      | no                |                                                                                                                                                                                                                                                                                                                             | | Sony          | Alpha 6600               | Micro-HDMI       | ?                           | 3.5 mm microphone in and monitor out  | Yes [1]       | 3840 × 2160 (UHD 1) 30 fps / 1920x1080 (FullHD) 60 fps      | no                |                                                                                                                                                                                                                                                                                                                             |
  
-[1] Camera icons displayed in HDMI-out can be hidden by menu.    +[1] camera icons displayed in HDMI-out can be hidden by menu.    
-[2] Needs Magic Lantern  +[2] needs Magic Lantern  
      
 For more information on cameras supporting clean output over HDMI see also:  For more information on cameras supporting clean output over HDMI see also: 
Line 115: Line 118:
   * [[https://sparkosoft.com/sparkocam | sparkocam (Win) for Canon and Nikon]]   * [[https://sparkosoft.com/sparkocam | sparkocam (Win) for Canon and Nikon]]
   * [[https://github.com/v002/v002-Camera-Live | v002 Camera Live (OSX) Canon]]   * [[https://github.com/v002/v002-Camera-Live | v002 Camera Live (OSX) Canon]]
 +
  
 ==== Headsets and Microphones ==== Headsets and Microphones
 +
 In most situations a headset gives the speaker the most freedom to move while keeping the microphone at the correct (or at least constant) distance to his mouth.   In most situations a headset gives the speaker the most freedom to move while keeping the microphone at the correct (or at least constant) distance to his mouth.  
 The main draw break is the viewer can see it. Depending if a talk back to the speaker e.g. for Q&A should be possible a headset is the best option.   The main draw break is the viewer can see it. Depending if a talk back to the speaker e.g. for Q&A should be possible a headset is the best option.  
Line 135: Line 140:
  
 === Open Broadcast Software (OBS) === Open Broadcast Software (OBS)
 +
 ==== OBS Operation ==== OBS Operation
-Within OBS we provide three composite modes which the speaker can choose from.   +Within [[howto:OBS|OBS]] we provide three composite modes which the speaker can choose from.   
 We aim here for simplicity while also delivering a similar experience to the stream viewers "as usual".   We aim here for simplicity while also delivering a similar experience to the stream viewers "as usual".  
 (NOTE: the files for this are not ready yet but feel free to play around and design some your self in the meantime) (NOTE: the files for this are not ready yet but feel free to play around and design some your self in the meantime)
Line 149: Line 155:
 {{::slides.png?400|}}   {{::slides.png?400|}}  
      
-==== OBS Settings + 
 +==== OBS Settings 
 + 
 If possible a GPU / hardware video encoder should be used to make sure we don't run into a high CPU load. On nearly all modern Intel CPUs this just works. If possible a GPU / hardware video encoder should be used to make sure we don't run into a high CPU load. On nearly all modern Intel CPUs this just works.
 NVidia and AMD(ATI) GPUs might or might not work. Have a look at [[hardware:en-decoder]].   NVidia and AMD(ATI) GPUs might or might not work. Have a look at [[hardware:en-decoder]].  
Line 170: Line 178:
 To send your talk out into the interwebs you also need to configure the streaming endpoint. You will get a URL from us / the event organisation to fill in here.   To send your talk out into the interwebs you also need to configure the streaming endpoint. You will get a URL from us / the event organisation to fill in here.  
 {{::stream.png?400|}} {{::stream.png?400|}}
 +
  
 ==== Fake Webcam ==== Fake Webcam
 +
 If you want to use the ouput of OBS in a group telco solution like jitsi you can do this with a "fake webcam". Depending on your OS there are different solutions for this: If you want to use the ouput of OBS in a group telco solution like jitsi you can do this with a "fake webcam". Depending on your OS there are different solutions for this:
 * [[https://github.com/CatxFish/obs-v4l2sink/blob/master/README.md | Linux]] * [[https://github.com/CatxFish/obs-v4l2sink/blob/master/README.md | Linux]]
Line 194: Line 204:
  
 Heralds will stream their feed to the same endpoint as the speakers. At the endpoint directing decision (which feed to show) can be made. Heralds will stream their feed to the same endpoint as the speakers. At the endpoint directing decision (which feed to show) can be made.
 +
 +
 == For providers of RTMP Endpoints  == For providers of RTMP Endpoints 
 +
 **The following instructions are for those who want to operate their own streaming server. Speakers or Heralds at distributed events do not need this.** **The following instructions are for those who want to operate their own streaming server. Speakers or Heralds at distributed events do not need this.**
 +
 +<hidden>
 +
 === Simple HLS streaming platform with nginx-rtmp === Simple HLS streaming platform with nginx-rtmp
 +
 +
   * possible sources: OBS, FFmpeg,...   * possible sources: OBS, FFmpeg,...
   * install nxing-rtmp:   * install nxing-rtmp:
Line 336: Line 354:
  * Configure OBS to push via RTMP to ```rtmp://<yourdomain>/show``` with a stream key of "stream" (after things are running, do some resarch for protecting RTMP via a secret in RTMP URL!)  * Configure OBS to push via RTMP to ```rtmp://<yourdomain>/show``` with a stream key of "stream" (after things are running, do some resarch for protecting RTMP via a secret in RTMP URL!)
  * Also see OBS settings section above  * Also see OBS settings section above
 +
 +</hidden>
  
 == But why not use... == But why not use...
-But first a few words on "why not use skype/gotomeeting/jitsi/Cisco ...". What all this services have in common is that they are designed as many-to-many communication tools.   + 
-How this is implemented differs from solution to solution but they all have in common that they alter resolution / bit-rate and other parameters as they think it's best.   +But first a few words on "Why not use Skype/GotoMeeting/Jitsi/Cisco ...": What all this services have in common is that they are designed as many-to-many communication tools.   
-This results in our test always in sub-optimal video quality. These solutions also need either a central server that does the video relaying or work on a peer-2-peer base which   +The implementation differs from solution to solution, but they all have in common that they alter resolution / bit-rate and other parameters as they think it's best. In our tests this always resulted in sub-optimal video quality.  
-means a lot of upload bandwidth is needed on the presenter side. They also run usually in the browser which is just not the perfect place to handle video.   +They also need either a central server relaying the video, or work on a peer-2-peer base which means a lot of upload bandwidth is needed on the presenter side.  
-Therefore we recommend a solution where the speaker streams their video to a distribution server with a fixed video quality and a CDN does the distribution.   + 
-In our case it's our own CDN but you can e.g. use the YouTube streaming service for free.  +Therefore we recommend solutions where speakers stream their video in a fixed video quality to a distribution server, and a CDN does the distribution. In our case it's our own CDN, but you can e.g. use the YouTube streaming service for free.  
      
-But if you just looking for a video telco solution have a look at [[https://jitsi.org/]] and host an instance your self. Below you find some hints how to connect the setup described here to  +If you just looking for a video telco solution have a look at [[https://jitsi.org/]] or [[https://bigbluebutton.org|BBB]] and host an instance yourself. Below you find some hints how to connect the setup described here to any telco solution.  
-any telco solution.  +
  
  • distributed-conference.txt
  • Last modified: 2020/12/16 20:46
  • by andi