multimedia:web_conferences_with_bigbluebutton:faq_about_bigbluebutton
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multimedia:web_conferences_with_bigbluebutton:faq_about_bigbluebutton [15:45 16. April 2020 ] – Sebastian Klepatz | 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 | ||
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- | ====== FAQ/Q&A about BigBlueButton ====== | + | ====== FAQ - BigBlueButton ====== |
- | [[multimedia: | + | |
- | === Which browser do I use optimally for video conferences with BBB? === | + | |
- | Preferably, please use Mozilla Firefox; we have not received any requests for difficulties with this, and the product is also regularly used in the data center by employees for conferences via BBB, so that the greatest experience is available. | + | |
- | \\ \\ | + | |
- | At present (as of 31.03.20) we have reported difficulties in using the Safari browser under MacOS. One workaround is the installation of Firefox for Mac; we are not yet aware of any other ways to fix the problem. | + | |
- | === I would like to record my meeting/ | + | [[multimedia: |
- | Recording of conferences on the BBB server is not provided and is technically disabled.\\ | + | |
- | For lectures, the recording of the lecture in a classroom is available as usual (lecturer and slides in OpenCast). For the development of dynamic lecture materials (on screen, for example: PowerPoint slides with insertions and annotations in the video, parallel to audio explanations by the lecturer), the computing center offers licenses from Camtasia for screen recording. Please send us an e-mail for the allocation of a license to [[support@rz.tu-clausthal.de|support@rz.tu-clausthal.de]] | + | |
+ | ==== Which browser works best with BBB? ==== | ||
- | === How many rooms can I create and share with others? === | + | 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. |
- | Ten rooms can be created per user. | + | |
+ | ==== Why is it not recommended to use Firefox? ==== | ||
- | === The quality of the image transmission | + | 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 BBB conference system is designed to enable video conferences | + | * The volume of the microphone |
+ | * Webcam images and audio transmission may not be in sync. | ||
+ | * Firefox always uses the default output device | ||
+ | * Images | ||
+ | * The quality | ||
- | === I want to upload a presentation, | + | ==== What internet connection do I need for using BBB? ==== |
- | The uploaded PDF files must not exceed 200 pages, the file size is limited to 30 MB and the conversion of the document on the server must not take longer than five minutes. If necessary, please split your files to be uploaded and publish them one by one. | + | |
+ | Real-time audio and video transmissions place significantly higher demands on network connections than regular websites. | ||
+ | * Download > 10 Mbps | ||
+ | * Upload > 2 Mbps | ||
+ | * Ping < 100 ms | ||
+ | * Jitter < 20 ms | ||
- | === It is difficult and confusing to react to feedback from the participants in a lecture === | ||
- | During an event, the lecturer should give a lecture and an assistant should monitor the chat as well as supervise the technical settings and prepare surveys, for example. In principle, it can be worth asking questions about speed and comprehensibility in the meantime. | ||
+ | ==== Which webcam do you recommend? ==== | ||
- | === I have a larger event, how many participants can BBB handle? === | + | Current laptops are usually equipped with good webcams. However, when using a PC or external monitor, then a separate webcam is needed. |
- | The BBB server is primarily intended | + | |
+ | 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. | ||
- | === The voice quality fluctuates greatly, sometimes individual participants cannot be understood at all === | ||
- | In video conferences, | ||
+ | ==== Can I upload my own virtual background? ==== | ||
- | === How do I use BBB in my lectures or how do I invite students | + | 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' |
+ | ==== I would like to record | ||
- | An integration in Stud.IP is already available, an integration in Moodle | + | At present, it is not possible to record meetings or events on the BBB server at TU Clausthal. To record a lecture |
- | === BBB does not work properly in Rocket.chat/when I open a BBB conference via the chat server | + | ==== BBB does not initially display a slide. ==== |
- | Depending on the browser you are using or the Rocket.chat client, difficulties may occur. Preferably please use the systems chat.tu-clausthal.de and the BBB server webconf.tu-clausthal.de independently of each other: The integration of the BBB server in the rooms of the chat server is not fully compatible with all browsers. | + | |
+ | 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 {{: | ||
- | === I cannot share my microphone or camera in the browser as described in the manual === | + | The start-up slide appears automatically for all participants when the presenter changes slides or zooms. \\ |
- | The webcam and microphone must be enabled both in the Windows Control Panel and in the browser to enable audio and video transmissions from your own computer. Therefore, please also check in the system settings whether these devices can be enabled. | + | |
- | === When using BBB with your smartphone, it will warm up significantly and the battery will discharge very quickly | + | ==== How can I change the layout of the BBB interface? ==== |
- | Mobile devices like smartphones need a lot of energy/get warm when used in video chat. Please ensure that charging facilities are available/ | + | |
+ | BBB version 2.4 introduced a choice of layouts. The default layout is the "Smart layout" | ||
- | === How can I switch BBB to English? | + | ==== When sharing my screen, |
- | BBB works completely in English if your own browser is installed in the English language version or the " | + | |
+ | 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 {{: | ||
+ | ==== How many rooms can I create in BBB? ==== | ||
- | === I have an unlisted error, which is not listed here === | + | Via [[https:// |
- | For errors | + | ==== I am organising a larger event. How many participants can partake in BBB? ==== |
+ | |||
+ | Based on our own experience and those from other universities, we expect meetings with one to three presenters and approximately 500 listeners to be possible without any problems. It is further possible to have meetings with more than 50 participants who all use video. As the number of participants increases, the webcam resolution, refresh rate, and data rate are automatically reduced. This prevents overloading end devices. Once the number of participants reaches 16*, BBB changes to a page-by-page display (*32 for moderators). | ||
+ | |||
+ | |||
+ | ==== Is it possible to get an exclusive server for a BBB event? ==== | ||
+ | |||
+ | When we started using BBB in 2020, it was not always very reliable and efficient. In addition, there was little experience with hosting larger events. Because | ||
+ | |||
+ | |||
+ | ==== I would like to upload a presentation but I keep getting an error message. ==== | ||
+ | |||
+ | If possible, please upload files using PDF format. PDF files should be a maximum of 200 pages long, have a maximum size of up to 30 MB, and their conversion should take a maximum of five minutes. If necessary, please split your files into several parts and upload them one by one. | ||
+ | |||
+ | |||
+ | ==== The presentation I uploaded looks different - fonts are incorrect and image errors are displayed. ==== | ||
+ | |||
+ | When uploading MS Office files such as Word or PowerPoint, BBB automatically converts these files to PDF format using LibreOffice. Because of this, it is possible that fonts, symbols, drawings, and formatting are affected. Animations are typically not supported. Please convert any files to PDF format using the programme in which they were created, and check your results prior to uploading. If content or animations are missing, you can use screen sharing for the presentation instead. | ||
+ | |||
+ | |||
+ | ==== 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. In addition, it is recommended to use Google Chrome as it has shown to produce a more balanced volume. | ||
+ | |||
+ | |||
+ | ==== I keep experiencing dropouts in audio and video. ==== | ||
+ | |||
+ | 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 | ||
+ | |||
+ | |||
+ | ==== 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. | ||
+ | |||
+ | |||
+ | ==== I cannot enable the microphone | ||
+ | |||
+ | In order to enable audio and video transmissions on your PC, you must first activate the webcam and microphone | ||
+ | |||
+ | |||
+ | ==== 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 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”. | ||
+ | |||
+ | |||
+ | ==== It is difficult and confusing | ||
+ | |||
+ | During a lecture, it is recommended to have an assistant who can observe chat messages and take care of participants. | ||
+ | |||
+ | |||
+ | ==== How do I use BBB in my courses? Or how do I invite the students to my BBB room? ==== | ||
+ | |||
+ | BBB is integrated into Stud.IP and Moodle via plugins. Please use either LMS to create and configure a BBB room for your course. See [[multimedia: | ||
+ | |||
+ | |||
+ | ==== How can I use BBB in lecture halls and seminar rooms? ==== | ||
+ | |||
+ | In large lecture halls at TU Clausthal, provisions have been made to transfer lectures from a PC to BBB. Audio transmissions from the audience are only possible to a limited extent. See [[multimedia: | ||
+ | |||
+ | Seminar rooms often do not supply fixed audio equipment. To use BBB in seminar rooms, you can hire audio equipment from the equipment loan service in the computing centre. Again, audio transmissions from the audience are only possible to a limited extent and questions may have to be repeated by the speaker. \\ | ||
+ | |||
+ | Some rooms, such as the Senate Meeting Room (A1-177) and the seminar room in the computing centre (B5-119), are equipped | ||
+ | |||
+ | |||
+ | ==== 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. From BBB version 2.7, the function " | ||
+ | |||
+ | |||
+ | ==== 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. | ||
+ | |||
+ | |||
+ | 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. ==== | ||
+ | |||
+ | Unfortunately, | ||
+ | |||
+ | |||
+ | ==== In a meeting with external partners, some cannot join the BBB room. ==== | ||
+ | |||
+ | Some companies and countries (for example, China) have sealed themselves off with firewalls in such a way that it is not possible to establish a connection to the BBB server at TU Clausthal. The website then still loads but audio and video connections fail. You can ask your external partner if they can set up a meeting room on their video conference platform, or else, you can contact the RZ support team for an alternative. | ||
+ | |||
+ | |||
+ | ==== How can I switch BBB to English? ==== | ||
+ | |||
+ | BBB is, by default, displayed in the same language as your browser. You can change the language via “settings” in the main menu of BBB. | ||
+ | |||
+ | |||
+ | ==== The answer to my question is not listed above. ==== | ||
+ | |||
+ | If your web browser or connected | ||
+ | |||
+ | |||
+ | {{tag> |
multimedia/web_conferences_with_bigbluebutton/faq_about_bigbluebutton.1587044750.txt.gz · Zuletzt geändert: 15:45 16. April 2020 von Sebastian Klepatz