multimedia:web_conferences_with_bigbluebutton:faq_about_bigbluebutton
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multimedia:web_conferences_with_bigbluebutton:faq_about_bigbluebutton [14:39 15. July 2020 ] – Martin Diedrich | multimedia:web_conferences_with_bigbluebutton:faq_about_bigbluebutton [16:57 25. September 2024 ] (aktuell) – [In breakout rooms, students should use more than one slide to jointly create a presentation.] Hans-Ulrich Kiel | ||
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- | ====== FAQ/Q&A about BigBlueButton ====== | + | ====== FAQ - BigBlueButton ====== |
[[multimedia: | [[multimedia: | ||
- | === Which browser do I use optimally for video conferences with BBB? === | ||
- | We receive constantly changing reports on our experiences almost every day. We can therefore only recommend that you test the browser of your choice and change your browser if there are any errors. | ||
- | === I would like to record my meeting/ | + | ==== Which browser works best with BBB? ==== |
- | Recording of conferences | + | |
- | For lectures, | + | 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. | ||
+ | |||
+ | |||
+ | ==== What internet connection do I need for using BBB? ==== | ||
+ | |||
+ | 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 | ||
+ | |||
+ | |||
+ | ==== 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: model "Brio 500" and model "Brio Ultra-HD Pro" for advanced users. For an optimal setup, please install the associated software [[https:// | ||
+ | |||
+ | 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. | ||
+ | |||
+ | |||
+ | ==== Can I upload my own virtual background? ==== | ||
+ | |||
+ | 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 my meeting/ | ||
+ | |||
+ | At present, it is not possible to record meetings or events | ||
+ | |||
+ | |||
+ | ==== 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 {{: | ||
+ | |||
+ | The start-up slide appears automatically for all participants when the presenter changes slides or zooms. | ||
+ | |||
+ | |||
+ | ==== How can I change the layout | ||
+ | |||
+ | BBB version 2.4 introduced | ||
+ | |||
+ | ==== When sharing my screen, | ||
+ | |||
+ | 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: | ||
+ | ==== How many rooms can I create in BBB? ==== | ||
+ | |||
+ | Via [[https:// | ||
+ | ==== I am organising a larger event. How many participants can partake in BBB? ==== | ||
+ | |||
+ | Based on our own experience and those from other universities, | ||
+ | |||
+ | |||
+ | ==== 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 of that, we had exclusive servers | ||
+ | |||
+ | |||
+ | ==== I would like to upload a presentation but I keep getting | ||
+ | |||
+ | 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 | ||
+ | |||
+ | 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 | ||
+ | |||
+ | |||
+ | ==== The voice quality varies greatly - sometimes individual participants cannot be understood at all. ==== | ||
+ | |||
+ | The sound quality heavily depends on the quality | ||
+ | |||
+ | |||
+ | ==== 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 or an overloaded PC, so please check your CPU utilization and your network connection. It is recommended | ||
+ | |||
+ | |||
+ | ==== 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 or camera as described in the instructions. ==== | ||
+ | |||
+ | 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 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”. | ||
- | === How many rooms can I create and share with others? === | ||
- | Ten rooms can be created per user. | ||
+ | ==== It is difficult and confusing to react to feedback during a lecture. ==== | ||
- | === The quality of the image transmission is not good enough, e.g. when using a document camera === | + | During a lecture, it is recommended |
- | The BBB conference system | + | |
- | === I want to upload a presentation, | + | ==== How do I use BBB in my courses? Or how do I invite the students |
- | 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. | + | |
- | === The uploaded presentation looks different - fonts are not correct, images have errors === | + | BBB is integrated into Stud.IP |
- | Uploading a presentation in a format other than PDF is not reliable: When uploading a file in a format other than PDF, a conversion is performed by BBB, fonts, symbols | + | |
- | === Drawings on a presentation uploaded by me appear blurry/ | + | ==== How can I use BBB in lecture halls and seminar rooms? ==== |
- | Depending on the size of the document used (length and width/ | + | |
+ | 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: | ||
- | === It is difficult and confusing to react to feedback | + | Seminar rooms often do not supply fixed audio equipment. To use BBB in seminar rooms, you can hire audio equipment |
- | During an event, the lecturer should give a lecture | + | |
+ | Some rooms, such as the Senate Meeting Room (A1-177) and the seminar room in the computing centre (B5-119), are equipped with microphones which allow audio transmissions without restrictions. | ||
- | === I have a larger event, how many participants can BBB handle? === | ||
- | The BBB server is primarily intended for the coordination of working groups and for courses in small groups with the active participation of students. Seminar presentations are also imaginable in this context. To what extent an event including interaction with the audience in groups of more than twenty people is technically stable is not yet reliably known. The computer center has not configured an upper limit. However, it is to be expected that low-performance PCs of individual participants will be overstrained if too many video images are transmitted. This is shown by picture and sound disturbances among the affected participants. Restrictions may need to be made (e.g. not all participants should activate their webcam at the same time, reduce the quality of the transmission, | ||
+ | ==== How can I transfer images from a visualizer? ==== | ||
- | === The voice quality fluctuates greatly, sometimes individual participants cannot be understood at all === | + | If a PC has multiple |
- | In video conferences, the general rule is that the simultaneous speech of several participants becomes unintelligible | + | |
- | === Occasional dropouts in audio and/or video === | + | ==== In breakout rooms, students |
- | We are aware of individual cases in which an activated VPN connection may have led to interruptions / dropouts of video and/or audio streams. Despite intensive investigation, we could neither prove this nor find the cause - nor could we prove the contrary. We therefore recommend that in the event of an error, conferences | + | |
+ | From BBB version 2.7.13, different documents can be selected for each room when creating breakout rooms, which are then loaded onto the whiteboard. These documents can also have multiple pages. They must first be uploaded to the main room using the ‘+’ button. | ||
- | === How do I use BBB in my lectures or how do I invite students | + | From BBB version 2.6, it is possible |
+ | ==== The playback of videos from the TU Clausthal video server does not work. ==== | ||
- | An integration in Stud.IP is already available, an integration | + | Unfortunately, the playback of videos from the TU Clausthal video server via the “external video” function |
- | === BBB does not work properly in Rocket.chat/when I open a BBB conference via the chat server | + | ==== In a meeting with external partners, some cannot join the BBB room. ==== |
- | 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. | + | |
+ | 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. | ||
- | === I cannot share my microphone or camera in the browser as described in the manual === | ||
- | 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. | ||
+ | ==== How can I switch BBB to English? ==== | ||
- | === When using BBB with your smartphone, it will warm up significantly and the battery will discharge very quickly === | + | BBB is, by default, displayed |
- | Mobile devices like smartphones need a lot of energy/get warm when used in video chat. Please ensure that charging facilities are available/ | + | |
- | === How can I switch BBB to English? | + | ==== The answer |
- | BBB works completely in English if your own browser is installed in the English language version or the " | + | |
+ | If your web browser or connected device malfunctions, | ||
- | === I have an unlisted error, which is not listed here === | ||
- | For errors of any kind: Please check whether a logout from the BBB server and, if necessary, a restart of your computer can help with sound or transmission problems. Especially when several conference rooms are used in quick succession or the microphone/ | ||
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multimedia/web_conferences_with_bigbluebutton/faq_about_bigbluebutton.1594816788.txt.gz · Zuletzt geändert: 14:39 15. July 2020 von Martin Diedrich