Unterschiede

Hier werden die Unterschiede zwischen zwei Versionen angezeigt.

--- multimedia:web_conferences_with_bigbluebutton:faq_about_bigbluebutton [17:40 24. May 2022 ] – Hans-Ulrich Kiel
+++ multimedia:web_conferences_with_bigbluebutton:faq_about_bigbluebutton [14:55 24. January 2024 ] (aktuell) – [How can I change the layout of the BBB interface?] Hans-Ulrich Kiel
@@ Zeile 6: / Zeile 6: @@
 Since Google Chrome browser offers the best support for BBB on all operating systems (except Apple iOS), we recommend using Chrome or another Chromium-based web browser for BBB conferences.
+==== Why is it not recommended to use Firefox? ====
+BBB is based on WebRTC. There are a few issues with the implementation in firefox which can negatively affect the quality of the conference:
+  * The volume of the microphone is not automatically regulated. Therefore, the audio transmission of individual participants can be either too loud or too quiet.
+  * Webcam images and audio transmission may not be in sync.
+  * Firefox always uses the default output device (speakers) of the operating system. It is not possible to manually set the output device.
+  * Images of presentations may lag.
+  * The quality of transmission is reduced when sharing your screen.
@@ Zeile 19: / Zeile 28: @@
 ==== Which webcam do you recommend? ====
-Current laptops are usually equipped with good webcams. However, when using a PC or external monitor, then a separate webcam is needed. The computing centre recommends the following Logitech webcams for individual work stations: models C925E and C930E for occasional use and model "Brio Ultra-HD Pro" for lecturers and frequent users. For an optimal setup, please install the associated software [[https://www.logitech.com/de-de/video-collaboration/software/logi-tune-software.html|Logi Tune]]. \\
+Current laptops are usually equipped with good webcams. However, when using a PC or external monitor, then a separate webcam is needed. The computing centre recommends the following Logitech webcams for individual work stations: model "Brio 500" and model "Brio Ultra-HD Pro" for advanced users. For an optimal setup, please install the associated software [[https://www.logitech.com/de-de/video-collaboration/software/logi-tune-software.html|Logi Tune]]. \\
 Note that webcams for individual work stations are not sufficient for the use in meeting rooms. Please contact the computing centre for advice on how to best equip your meeting room with video conferencing technology.
@@ Zeile 26: / Zeile 35: @@
 ==== Can I upload my own virtual background? ====
-From version 2.4, BBB offers virtual backgrounds for webcams. At present, these can only be provided centrally. They will occasionally be exchanged as part of system updates.
+From version 2.6 of BBB, you can upload your own images to be used as a virtual background. This can be done by clicking on the white check mark next to the camera icon, scrolling to the right under the „Virtual background settings“ section and then selecting „Upload from device“. Uploaded images are stored in your web browser's local storage and are available for future use when using the same PC.
 ==== I would like to record my meeting/event. ====
-At present, it is not possible to record meetings or events on BBB. To record a lecture in a lecture hall, please use the Opencast system. To create your own lecture video using screen recording on a PC, the computing centre offers a license for Camtasia. See [[multimedia:camtasia:start]] for more information.
+At present, it is not possible to record meetings or events on the BBB server at TU Clausthal. To record a lecture in a lecture hall, please use the Opencast system. To create your own lecture video using screen recording on a PC, the computing centre offers a license for Camtasia. See [[multimedia:camtasia:start]] for more information.
-==== BBB does not initially display a slide ====
+==== BBB does not initially display a slide. ====
-When we switched to BBB version 2.4, we decided to hide the start-up slide. This is because most participants are already familiar with BBB. By clicking the presentation button {{:multimedia:webkonferenzen_mit_bigbluebutton:button_praesentation_off.png}}, individual participants can view the start-up slide, if needed.  \\
+When we switched to BBB version 2.4, we decided to hide the start-up slide. This is because most participants are already familiar with BBB. By clicking the presentation button {{:multimedia:webkonferenzen_mit_bigbluebutton:button_praesentation_off.png?30}}, individual participants can view the start-up slide, if needed.  \\
-The start-up slide appears automatically for all participants when the presenter changes slides or zooms. Occasionally, newly uploaded slides will not be displayed automatically. In that case, please open the slides via the presentaton button after the conversion is complete. \\
+The start-up slide appears automatically for all participants when the presenter changes slides or zooms.  \\
-==== How many rooms can I create in BBB? ====
+==== How can I change the layout of the BBB interface? ====
-Each user can create ten rooms in BBB.
+BBB version 2.4 introduced a choice of layouts. The default layout is the "Smart layout" which automatically arranges the layout of the webcam images and presentation. Via the settings menu {{:multimedia:webkonferenzen_mit_bigbluebutton:menue.png?30}}, you can switch to "Custom layout". This layout lets you adjust the size and position of each section in the browser window.
+==== When sharing my screen, the size of my webcam image is reduced.  ====
+Shared images are shown to the presenter in reduced size to avoid video loops and their resulting high data usage. If needed, they can be expanded to full size via the full screen icon {{:multimedia:webkonferenzen_mit_bigbluebutton:fullscreen-bbb-t.png?30}} at the top right of the image.
+==== How many rooms can I create in BBB? ====
+Via [[https://webconf.tu-clausthal.de/|Webconf]], each user can create as many rooms as they wish.
 ==== I am organising a larger event. How many participants can partake in BBB? ====
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 ==== The voice quality varies greatly - sometimes individual participants cannot be understood at all. ====
-The sound quality heavily depends on the quality of microphone being used. If several participants speak at the same time, it becomes incomprehensible. Therefore, we recommend to turn microphones off when not speaking. Background noises may also cause disruptions. As participants often do not notice these themselves, please inform them discreetly.
+The sound quality heavily depends on the quality of microphone being used. If several participants speak at the same time, it becomes incomprehensible. Therefore, we recommend to turn microphones off when not speaking. Background noises may also cause disruptions. As participants often do not notice these themselves, please inform them discreetly. In addition, it is recommended to use Google Chrome as it has shown to produce a more balanced volume.
@@ Zeile 74: / Zeile 86: @@
 Real time audio and video transmissions place a significantly higher demand on the quality of network connections and performance of end devices than regular websites. This means that audio and video dropouts are typically the result of an unstable network connection or an overloaded PC, so please check your CPU utilization and your network connection. It is recommended to use a wired network connection instead of WiFi, if possible.  You can test the speed of your network connection at [[https://speedtest.rz.tu-clausthal.de/]].
+==== Is the transmission quality worse when using VPN? ====
+The transmission quality was reportedly worse when using VPN. Therefore, it was initially recommended to disconnect all VPN connections before joining a BBB conference. However, the optimization of the VPN Server on July 15, 2022, eliminated this problem. This means that VPN can now be used for all video conferences.
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 In order to enable audio and video transmissions on your PC, you must first activate the webcam and microphone via the Windows Control Panel. Then you have to grant your browser permission to access them. If you have accidentally turned off permission, then you must first undo this as described in the instructions.
+==== Firefox does not detect any output device (speakers). ====
+Firefox cannot automatically detect and switch output devices. It uses the default device of the operating system. If the output device of the operating system is correctly set up, then the audio output will work regardless of Firefox claiming that no device was found. However, we recommend using Google Chrome instead of Firefox.
 ==== BBB uses a different audio device than intended. ====
-You can change audio devices by clicking the white check mark next to the speaker icon. It is also possible to set default audio devices in Windows by right-clicking the speaker icon on the taskbar and then opening the sound settings. The browser should then automatically use your default devices. \\
+You can change audio devices by clicking the white check mark next to the microphone icon. It is also possible to set default audio devices in Windows by right-clicking the speaker icon on the taskbar and then opening the sound settings. The browser should then automatically use your default devices. \\
 Note that your default devices may be unintentionally changed due to the sequence in which they are switched on, reconnecting devices or driver updates. Therefore, we recommend to disable any unwanted devices in Windows via “manage audio devices”.
@@ Zeile 109: / Zeile 131: @@
 ==== How can I transfer images from a visualizer? ====
-If a PC has multiple video sources, such as a webcam and a visualizer, then it is possible for BBB to transmit two video images at the same time, up to a maximum resolution of 1920×1080 with 30 frames/s.  Unfortunately, this means that data will be compressed which leads to a loss of quality. Therefore, the display of detail is limited.
+If a PC has multiple video sources, such as a webcam and a visualizer, then it is possible for BBB to transmit two video images at the same time. From BBB version 2.7, the function "Camera as content" can be used to display the visualizer image instead of the presentation with a resolution of 1920×1080 at 30 frames/s. Unfortunately, this means that data will be compressed which leads to a loss of quality. Therefore, the display of detail is limited.
-==== In breakout rooms, students should use more than one slide to jointly create a presentation ====
+==== In breakout rooms, students should use more than one slide to jointly create a presentation. ====
-In breakout rooms, BBB provides only one page on the whiteboard. It is therefore recommended that students create presentations using several blank pages and uploading them to the breakout room. At present, any work which is undertaken in a breakout room is not saved and cannot be transferred to the main room. Please advise your students to document their work using screenshots.
+In breakout rooms, BBB provides only one page on the whiteboard. It is therefore recommended that students create presentations using several blank pages and uploading them to the breakout room.
+From BBB version 2.6, it is possible to transfer the results from breakout rooms to the main room via PDF files. This option must be selected when creating breakout rooms. The PDF files are then available to the presenter via the plus button once the breakout rooms close.
 ==== The playback of videos from the TU Clausthal video server does not work. ====