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| distributed-conference [2020/05/29 15:25] – derpeter | distributed-conference [2020/12/16 20:46] (current) – [OBS Operation] andi |
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| 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). |
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| == 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. |
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| 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". |
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| ==== Improving video and audio quality | ==== Improving video and audio quality |
| {{:telcocam.jpg?200 |}} | {{:telcocam.jpg?200 |}} |
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| 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** |
| * If a camera is at hand (e.g. DSLR), which is able to output HDMI (check using a TV / screen) or USB tethering, using it can improve the video quality drastically | * If a camera is at hand (e.g. DSLR), which is able to output HDMI (check using a TV / screen) or USB tethering, using it can improve the video quality drastically |
| * An affordable solution to connect this camera on Windows/Linux/MacOS is [[hardware:elgato-cam-link]] which needs no drivers or binary software to work | * An affordable solution to connect this camera on Windows/Linux/MacOS are [[hardware:usb3-capture-devices]] which need no drivers or binary software to work |
| * [[hardware:decklink]] are also a good option | * [[hardware:decklink]] are also a good option |
| * USB tethering (see below camera section) usualy provides a lower resolution and image quality than HDMI out but you still get better image as with most webcams. | * USB tethering (see below camera section) usualy provides a lower resolution and image quality than HDMI out but you still get better image as with most webcams. |
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| === 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. |
| For some cameras you can get firmware modifications that allow a clean feed output to be enabled. | For some cameras you can get firmware modifications that allow a clean feed output to be enabled. |
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| ^ Manufacturer ^ Model ^ Connector Video ^ USB tethering ^ Connector Audio ^ Clean Output ^ Maximum Resolution ^ 30 min rec limit ^ Comment ^ | ^ Manufacturer ^ Model ^ Connector Video ^ USB tethering ^ Connector Audio ^ Clean Output ^ Maximum Resolution ^ 30 min rec limit ^ Comment ^ |
| | BlackMagic | PocketCinema 4k | HDMI | no | mini XLR | Yes [1] | 1920x1080 (FullHD) | no | | | | BlackMagic | PocketCinema 4k | HDMI | no | mini XLR | Yes [1] | 1920x1080 (FullHD) | no | | |
| | BlackMagic | Pocket Cinema Camera 6K | HDMI | no | mini XLR | Yes [1] | 6144x3456 | no | | | | BlackMagic | Pocket Cinema Camera 6K | HDMI | no | mini XLR | Yes [1] | 6144x3456 | no | | |
| | Canon | 550D | Mini-HDMI | yes (1056x704) | 3.5 mm | Yes [1] [2] | 1920x1080 (FullHD) | yes | probably overheats after ~30 min when streaming via HDMI [[https://mastodon.social/@monoxyd/104086684739946568|tested by monoxyd]], with USB thethering and original canon firmware capture is possible for at least a hour (the battery didn't allow for longer tests) (tested with GPhoto) | | | Canon | 250D | Mini-HDMI | untested | 3.5 mm (Stereo) | Yes | 4K | yes | | |
| | Canon | 600D | Mini-HDMI | yes (1056x704) | 3.5 mm | Yes [1] [2] | 1920x1080 (FullHD) | yes | Image has black borders which need to be cropped in software. Magic Lantern needed for clean view. Parallel recording on camera will reduce resolution on HDMI. Fake Battery with power supply needed to not run on battery | | | Canon | 550D | Mini-HDMI | yes (1056x704) | 3.5 mm | Yes [1] [2] | 1920x1080 (FullHD) | yes | probably overheats after ~30 min when streaming via HDMI [[https://mastodon.social/@monoxyd/104086684739946568|tested by monoxyd]], with USB thethering and original canon firmware capture is possible for at least a hour (the battery didn't allow for longer tests) (tested with GPhoto) | |
| | Canon | 70D | Mini-HDMI | yes (1104 x 736) | 3.5 mm | No | 1920x1080 (FullHD) | yes | Letterbox Overlay can't be turned off in Canon firmware. | | | Canon | 600D | Mini-HDMI | yes (1056x704) | 3.5 mm | Yes [1] [2] | 1920x1080 (FullHD) | yes | Image has black borders, with ML the image has smaler borders. Magic Lantern needed for clean view. Parallel recording on camera will reduce resolution on HDMI. Fake Battery with power supply needed to not run on battery | |
| | Canon | 5D Mark III | Mini-HDMI | ? | 3.5 mm | Yes [1] | 1920x1080 (FullHD) | ? | Since Firmware 1.2.1 5D Mark III can now be upgraded (for free) to capture clean, uncompressed YCbCr 4:2:2 8-bit digital video. Uncompressed footage will be sent with embedded time code over the camera’s HDMI output while it simultaneously displays the video on the rear LCD and records it to its memory cards. | | | Canon | 70D | Mini-HDMI | yes (1104 x 736) | 3.5 mm | No | 1920x1080 (FullHD) | yes | Letterbox Overlay can't be turned off in Canon firmware. | |
| | Fuji | X-T2 | Micro-HDMI | ? | ? | Yes | 1920x1080 (FullHD) | ? | Battery-Mode only. Mains current feed requires Fujifilm VG-XT2 battery handgrip. X-T3 is probably similar, but with UHD and normal HDMI connector (to be verified). | | | Canon | 5D Mark III | Mini-HDMI | ? | 3.5 mm | Yes [1] | 1920x1080 (FullHD) | ? | Since Firmware 1.2.1 5D Mark III can now be upgraded (for free) to capture clean, uncompressed YCbCr 4:2:2 8-bit digital video. Uncompressed footage will be sent with embedded time code over the camera’s HDMI output while it simultaneously displays the video on the rear LCD and records it to its memory cards. | |
| | Nikon | D750 | Mini-HDMI | ? | ? | Yes [1] | 1920x1080 (FullHD) | ? | | | | Fuji | X-T2 | Micro-HDMI | win / linux ? | ? | Yes | 1920x1080 (FullHD) | ? | Battery-Mode only. Mains current feed requires Fujifilm VG-XT2 battery handgrip. X-T3 is probably similar, but with UHD and normal HDMI connector (to be verified). | |
| | Panasonic | AG-UX90 | HDMI | no | XLR | Yes [1] | 3840 × 2160 (UHD 1) | no | During internal recording HDMI Resolution is limited to 1920x1080 (FullHD). | | | Nikon | D750 | Mini-HDMI | no | 3.5mm | Yes [1] | 1920x1080 (FullHD) | no | | |
| | Panasonic | HDC-SD66 | Mini-HDMI | no | none | Yes [1] | 1920x1080 (FullHD, Interlaced), 720x576 (DVD, progressive) | no | FullHD Signal is interlaced. No Microphone input. Icons can be turned off in Menu via Settigs > Ext-Display > Off. | | | Panasonic | AG-UX90 | HDMI | no | XLR | Yes [1] | 3840 × 2160 (UHD 1) | no | During internal recording HDMI Resolution is limited to 1920x1080 (FullHD). | |
| | Panasonic | HDC-SD909 | Mini-HDMI | no | 3.5 mm | Yes [1] | 1920x1080 (FullHD) | no | Camera icons displayed in HDMI-out can be hidden by pressing the 'EXT DISPLAY' button on the remote. Rotating the Display by 180 degree (so that the display is showing in direction of the camera lens) also turns off the overlay. This overrides the settinge set by remote. There seems to be no menu option for this. | | | Panasonic | HDC-SD66 | Mini-HDMI | no | none | Yes [1] | 1920x1080 (FullHD, Interlaced), 720x576 (DVD, progressive) | no | FullHD Signal is interlaced. No Microphone input. Icons can be turned off in Menu via Settigs > Ext-Display > Off. | |
| | Panasonic | HC-X1 | HDMI | no | XLR | Yes [1] | 3840 × 2160 (UHD 1), 4096 × 2160 (4K) | no | During internal recording HDMI Resolution is limited to 1920x1080 (FullHD). Probably the same as AG-UX180. | | | Panasonic | HDC-SD909 | Mini-HDMI | no | 3.5 mm | Yes [1] | 1920x1080 (FullHD) | no | Camera icons displayed in HDMI-out can be hidden by pressing the 'EXT DISPLAY' button on the remote. Rotating the Display by 180 degree (so that the display is showing in direction of the camera lens) also turns off the overlay. This overrides the settinge set by remote. There seems to be no menu option for this. | |
| | Panasonic | DC-S1 | HDMI | ? | 3.5 mm / XLR | Yes [1] | 3840 × 2160 (UHD 1) | no | Optional dual XLR audio preamp. | | | Panasonic | HC-X909 | Mini-HDMI | no | 3.5 mm | Yes [1] | 1920x1080 (FullHD) | no | Camera icons displayed in HDMI-out can be hidden by pressing the 'EXT DISPLAY' button on the remote. Rotating the Display by 180 degree (so that the display is showing in direction of the camera lens) also turns off the overlay. This overrides the settinge set by remote. There seems to be no menu option for this. | |
| | Panasonic | DC-GH4 | Micro-HDMI | photo only | 3.5 mm / XLR | Yes [1] | 3840 × 2160 (UHD 1) | yes | Dual SD slot. Optional dual XLR audio preamp. 4:2:2 10-bit or 8-bit HDMI. Optional SDI / XLR kit | | | Panasonic | HC-X1 | HDMI | no | XLR | Yes [1] | 3840 × 2160 (UHD 1), 4096 × 2160 (4K) | no | During internal recording HDMI Resolution is limited to 1920x1080 (FullHD). Probably the same as AG-UX180. | |
| | Panasonic | DC-GH4R | Micro-HDMI | photo only | 3.5 mm / XLR | Yes [1] | 3840 × 2160 (UHD 1) | yes | Dual SD slot. Optional dual XLR audio preamp. 4:2:2 10-bit or 8-bit HDMI. Optional SDI / XLR kit | | | Panasonic | DC-S1 | HDMI | win / linux inital support | 3.5 mm / XLR | Yes [1] | 3840 × 2160 (UHD 1) | no | Optional dual XLR audio preamp. | |
| | Panasonic | DC-GH5 | HDMI | photo only | 3.5 mm / XLR | Yes [1] | 3840 × 2160 (UHD 1) | no | Dual SD slot. Optional dual XLR audio preamp. 4:2:2 10-bit or 8-bit HDMI, https://www.youtube.com/watch?v=oqWofspD6BA | | | Panasonic | DC-S5 | Micro-HDMI | win / linux inital support | 3.5 mm / XLR | Yes [1] | 3840 × 2160 (UHD 1) | for 4k 10bit | Optional dual XLR audio preamp. | |
| | Panasonic | DC-GX80 | Micro-HDMI | ? | 3.5 mm | Yes [1] | 3840 × 2160 (UHD 1) | ? | | | | Panasonic | DC-GH4 | Micro-HDMI | photo only | 3.5 mm / XLR | Yes [1] | 3840 × 2160 (UHD 1) | yes | Dual SD slot. Optional dual XLR audio preamp. 4:2:2 10-bit or 8-bit HDMI. Optional SDI / XLR kit | |
| | Sony | Alpha III | Micro-HDMI | ? | 3.5 mm | Yes [1] | 3840 × 2160 (UHD 1) | yes | Gets very hot over time. | | | Panasonic | DC-GH4R | Micro-HDMI | photo only | 3.5 mm / XLR | Yes [1] | 3840 × 2160 (UHD 1) | yes | Dual SD slot. Optional dual XLR audio preamp. 4:2:2 10-bit or 8-bit HDMI. Optional SDI / XLR kit | |
| | Sony | FDR-AX100E | Micro-HDMI | ? | ? | Yes [1] | 3840 × 2160 (UHD 1) | ? | During internal recording, HDMI-out is blank in UHD -> Change resolution to 1920x1080 (FullHD), HDMI out is active during recording | | | Panasonic | DC-GH5 | HDMI | win / linux ? / osx ? | 3.5 mm / XLR | Yes [1] | 3840 × 2160 (UHD 1) | no | Dual SD slot. Optional dual XLR audio preamp. 4:2:2 10-bit or 8-bit HDMI, https://www.youtube.com/watch?v=oqWofspD6BA | |
| | | Panasonic | DC-GX80 | Micro-HDMI | ? | 3.5 mm | Yes [1] | 3840 × 2160 (UHD 1) | ? | | |
| | | Sony | Alpha III | Micro-HDMI | ? | 3.5 mm | Yes [1] | 3840 × 2160 (UHD 1) | yes | Gets very hot over time. | |
| | | Sony | FDR-AX100E | Micro-HDMI | ? | ? | Yes [1] | 3840 × 2160 (UHD 1) | ? | During internal recording, HDMI-out is blank in UHD -> Change resolution to 1920x1080 (FullHD), HDMI out is active during recording | |
| | | Sony | Alpha 6100 | Micro-HDMI | ? | 3.5 mm microphone | 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 | | |
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| [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 |
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| For more information on cameras supporting clean output over HDMI see also: | For more information on cameras supporting clean output over HDMI see also: |
| * [[http://gphoto.sourceforge.net/doc/remote/ | list of cameras supported by libgphoto2 for USB tethering]] | * [[http://gphoto.sourceforge.net/doc/remote/ | list of cameras supported by libgphoto2 for USB tethering]] |
| * [[https://github.com/Atterratio/obs-gphoto | OBS plugin (Linux) for gphoto2]] | * [[https://github.com/Atterratio/obs-gphoto | OBS plugin (Linux) for gphoto2]] |
| * [[https://sparkosoft.com/sparkocam | sparkocam (Win) for Canon and Nikon]] | * [[https://fujifilm-x.com/de-de/support/download/software/x-webcam/ | offical Fuji webcam tool (win/osx)]] |
| * [[https://github.com/v002/v002-Camera-Live | v002 Camera Live (OSX) Canon]] | * [[https://www.usa.canon.com/internet/portal/us/home/support/self-help-center/eos-webcam-utility/ | offical Canon EOS webcam tool (win/osx)]] |
| * [[https://fujifilm-x.com/de-de/support/download/software/x-webcam/]] Fuji webcam tool | * [[https://www.panasonic.com/global/consumer/lumix/lumixtether.html | offical Panasonic Lumix webcam tool (win) ]] |
| * [[https://www.usa.canon.com/internet/portal/us/home/support/self-help-center/eos-webcam-utility/]] Canon EOS webcam tool | * third party tools for win/osx |
| | * [[https://sparkosoft.com/sparkocam | sparkocam (Win) for Canon and Nikon]] |
| | * [[https://github.com/v002/v002-Camera-Live | v002 Camera Live (OSX) Canon]] |
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| ==== Headsets and Microphones | ==== Headsets and Microphones |
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| 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. |
| if you have a huge beards that interferes with the headset and you don't have a directed mic. | if you have a huge beards that interferes with the headset and you don't have a directed mic. |
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| ^ Type ^ Manufacturer ^ Model ^ Connector ^ Capsule Typ ^ Comment ^ Link ^ | ^ Type ^ Manufacturer ^ Model ^ Connector ^ Capsule Typ ^ Comment ^ Link ^ |
| | headset | logitech | h370 | USB | | decent entry level USB headset for quiet rooms | https://www.logitech.com/en-us/product/h370-usb-headset-noise-canceling-mic | | | headset | logitech | h370 | USB | | decent entry level USB headset for quiet rooms | https://www.logitech.com/en-us/product/h370-usb-headset-noise-canceling-mic | |
| | directed | Røde | videomic | 3.5 mm jack | cardioid condenser microphone capsule | decent on cam mic for about 40€, comes with decoupling holder and windshield | https://www.rode.com/microphones/videomicro | | | directed | Røde | videomic | 3.5 mm jack | cardioid condenser microphone capsule | decent on cam mic for about 40€, comes with decoupling holder and windshield | https://www.rode.com/microphones/videomicro | |
| | lavalier | Røde | Røde Wireless GO | 3.5 mm jack | omnidirectional | wireless set: lightweight transmitter with microphone and receiver ~180€ | https://www.thomann.de/de/rode_wireless_go.htm | | | lavalier | Røde | Røde Wireless GO | 3.5 mm jack | omnidirectional | wireless set: lightweight transmitter with microphone and receiver ~180€ | https://www.thomann.de/de/rode_wireless_go.htm | |
| | headset | Røde | Røde HS2-P Large | 3.5 mm jack | omnidirectional | headset fits to Røde Wireless GO ~240€ | https://www.thomann.de/de/rode_hs2_p_large.htm | | | headset | Røde | Røde HS2-P Large | 3.5 mm jack | omnidirectional | headset fits to Røde Wireless GO ~240€ | https://www.thomann.de/de/rode_hs2_p_large.htm | |
| | directed | Røde | Røde podcaster | USB | Niere | Table / Arm mic, ~220€ so only if you need it often | https://de.rode.com/microphones/podcaster | | | directed | Røde | Røde podcaster | USB | Niere | Table / Arm mic, ~220€ so only if you need it often | https://de.rode.com/microphones/podcaster | |
| | headset | HyperX | Cloud Alpha S | USB | bidirektional | Gaming Headset, but very good mic quality ~100€ | https://www.hyperxgaming.com/de/headsets/cloud-alpha-s-gaming-headset | | | headset | HyperX | Cloud Alpha S | USB | bidirektional | Gaming Headset, but very good mic quality ~100€ | https://www.hyperxgaming.com/de/headsets/cloud-alpha-s-gaming-headset | |
| | headset | HyperX | Cloud II | USB / 3.5mm jack (Speaker / Mic combined) | condenser (back electret) | Gaming Headset, but very good mic quality ~100€ | https://www.hyperxgaming.com/de/headsets/cloud-gaming-headset | | | headset | HyperX | Cloud II | USB / 3.5mm jack (Speaker / Mic combined) | condenser (back electret) | Gaming Headset, but very good mic quality ~100€ | https://www.hyperxgaming.com/de/headsets/cloud-gaming-headset | |
| | directed | M-Audio | Uber Mic | USB | 3-capsule condenser | Table / Arm mic, ~100€ | https://m-audio.com/ubermic | | | directed | M-Audio | Uber Mic | USB | 3-capsule condenser | Table / Arm mic, ~100€ | https://m-audio.com/ubermic | |
| | | lavailer | Sennheiser | AVX-MKE2 set | XLR with 3.5mm adapter included | omnidirectional | wireless headset using DECT, excellent quality but expensive | https://en-de.sennheiser.com/camera-wireless-lavalier-microphone-system-set-avx-mke2 | |
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| === Open Broadcast Software (OBS) | === Open Broadcast Software (OBS) |
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| ==== 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) |
| {{::slides.png?400|}} | {{::slides.png?400|}} |
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| ==== OBS Settings | |
| | ==== OBS Settings |
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| 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]]. |
| 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|}} |
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| ==== Fake Webcam | ==== Fake Webcam |
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| 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]] |
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| 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. |
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| == For providers of RTMP Endpoints | == For providers of RTMP Endpoints |
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| **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.** |
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| | <hidden> |
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| === Simple HLS streaming platform with nginx-rtmp | === Simple HLS streaming platform with nginx-rtmp |
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| * possible sources: OBS, FFmpeg,... | * possible sources: OBS, FFmpeg,... |
| * install nxing-rtmp: | * install nxing-rtmp: |
| * 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> |
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| == 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. |
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| 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. | |
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