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Lecture Recordings from Home

You can provide contents of your course for students as audio recording or screen recording. In contrast to entire course recordings (lecture casts), it is advisable to divide the material into shorter sections with a total length of 5 to 15 minutes.

Recording audio

In the form of audio recordings, also called "audio podcasts", teaching contributions can be poduced straightforward, and students can access them easily.

For recording and editing of lectures without images (podcasts) the free version of the easy to use software  Lexis Audio Editor can be recommended. The software can be used on the smartphone / tablet (Android, iOS) or on the PC (Windows 10, a Microsoft account is necessary for the download).

The audio files can be saved as wav, wma oder m4a files, the mp3 file format is only available in the paid version (6,99€, as of 22 May 2020). If necessary, the audio file can be converted to the mp3 format with the free, web-based tool Audio Converter.

A step-by-step guide to use the Lexis Audio Editor can be downloaded as PDF LexisAudiorecording

Features of the Lexis Audio Editor:

  • language settings: German or English
  • audio recording, pause the recording
  • edit audio recordings
  • insert silence and convert sound to silence
  • improve sound, reduce noise etc.

For audio recordings on a Mac, the integrated tool GarageBand is recommendable. A tutorial to using it can be found here.


For those who want to devote themselves more intensively to the topic, the Open Source software Audacity, also available via the WU-Sofwarecenter, is recommended. A tutorial to guide you through the first steps can be found here.

PC screen recordings

Use the screen capture feature of your computer or tablet, to easily produce videos with the following content:

  • Personal address → use of webcam
  • Navigation in the internet → Screen recording of webbrowser
  • Use of software installed on the PC → Screen recording of software
  • Presentation with spoken comments → e.g. PowerPoint

This content can also be recorded in a mix, e.g. by starting with a personal address (webcam image) continued by a narrated PowerPoint presentation (screen image), and concluding with a final personal address (webcam image).

How can I record my screen without installing extra software?

Most computers already have an integrated screen recorder with which screen recordings can be easily produced.

Windows 10
  1. Open the window or program you want to record.
  2. Press the key combination [Windows] + [G].
  3. Confirm the question whether you want to open the (so-called) "game bar".
  4. Press the record button (dot) to start video recording.
  5. The recorder records a video of the active program as an MP4 file.
  6. After the recording is finished, the file is saved by default in C: \ Users \ <user name> \ Videos \ Captures.


By default, the screen recorder does not work in File Explorer or on the Windows desktop. To do this, you must first start the recording in an open program and then switch to the desktop or file explorer with the key combination [Alt] + [Tab].

  1. Open "QuickTime Player" and choose File | New screen capture to open the Screenshot screen.
  2. Under "Options", select how the screen capture should be controlled and saved.
  3. Start the screen recording with "Record".
  4. "Stop recording" ends the screen recording.

You can find more information here.

MacOS Mojave 
  1. Press the key combination [Shift] + [(⌘)-5].
  2. Choose to capture the entire screen or a selected area of the screen.
  3. After the recording is finished, the video is saved automatically.
  4. The video can still be edited before saving.

You can find more information here.

iOS (e.g. iPad, iPhone) 
  1. Choose Settings | Control Center | Customize Controls and add the Screen Capture feature.
  2. On any screen, swipe up from the bottom of the screen or down from the top right.
  3. Press the gray record icon and tap "Microphone".
  4. Select "Start recording".
  5. After a 3-second countdown, recording begins.
  6. Tap the red status bar at the top of the screen and then tap "Stop" to stop recording.
  7. After the recording is finished, the file is saved by default under "Photos".

You can find more information here.


Kazam is a program written in Python that uses a GTK3 interface. The sound is recorded when creating a screencast via PulseAudio.  

  1. Install Kazam and start it on Ubuntu and Ubuntu-GNOME by clicking on the logo. In Xubuntu you can find the program in the application menu in "Multimedia".
  2. After the first program call, the main window of the software will appear.
  3. Select "Screen recording", define the recording area as full screen or screen section and select the audio source (e.g. external microphone).
  4. Start the recording with a left click of the mouse button on "Capture".
  5. After you have finished recording, you can open the video with an external video editor or save it directly.

You can find more information here.

How can I record my PowerPoint presentation?

Find "Record Slide Show" on the "Slide Show" tab in PowerPoint. Before you start the recording, you can determine in the dialog what you want to record:

  • Display duration for slides and animations
  • Comments, freehand and laser pointer

With these options, you can customize the time period of the slide display and add audio comments to the slides (a microphone must be connected to the computer for this or you can use the integrated microphone which will affect the sound quality). For most tasks, it makes sense to activate both options.

After starting the recording, you can start your lecture. The display duration of the slides is recorded including your comments. The "Recording" toolbar appears in the upper left-hand area of ​​the screen, with which the recording can be stopped or restarted. Right-click on the slide during the recording (the recording is pausing at this moment) in order to obtain the desired tools in the context menu displayed under the menu item "Pointer options".

Video Tutorial (Office 2019 / 365). Find PPP-Screen Recording here.

Step-by-step instruction

  1. Go to "Record Slide Show", under "Slide Show".
  2. Keep “Comments, Freehand and Laser Pointer” activated.
  3. Start the presentation.
  4. Click through the presentation to activate animations and slide transitions and add audio comments to each page.
  5. End the screen recording by clicking on ESC.
  6. When you are finished, click Export | Create video.
  7. Keep all suggested settings for an export of the video.

You can find more information here.

How can I record my Keynote presentation?

In Keynote you can record your presentation and add narrative text to your slides. To record a narrative text, you can speak the accompanying text to your presentation as normal as you scroll from slide to slide. The voice and speed at which you scroll through the slides are recorded and retained for playback.

Step-by-step instruction

  1. Click on "Show" | "Record presentation" in the menu bar.
  2. The capture window will appear. You can use the icon at the top right to determine what you will see (only current slide, next slide, moderation notes, etc.).
  3. Click at the bottom of the window to start recording the presentation. The timer counts down from 3 before the recording starts.
  4. Speak the text to be recorded into the microphone.
  5. In the capture window, click the slide or press the right arrow on the keyboard to continue with the next slide.
  6. Click the "Pause" button to pause the recording and then click the red dot again to continue recording.
  7. To stop recording, click the red dot again.
  8. Press the "ESC" key to save the recording and end the presentation
  9. Go to "Demonstrate" | "Play recorded presentation" to listen to the recording again.
  10. Export the presentation via "File" | "Export" | "Quicktime" to save the recording in a video format.


A new recording can only be saved if you delete an existing recording.

You can find more information here.

What software is recommended by the WU for screen-recordings?

The Open Broadcast Software (OBS) can be downloaded from the WU software center and can also be installed as free software on private devices (private download:

Step 1: set up the program
  1. Install the software
  2. Go to Settings | Audio to select your preferred microphone.
  3. Go to Settings | Output to select where the recording will be saved.
  4. Go to Settings | Output and change the recording format to mp4.
  5. Go to Settings | Hotkeys to set hotkeys for e.g. Start / Stop and Pause.
  6. Confirm your selection with "Okay" and "Apply".
Step 2: Select scenes and sources 

By default, OBS only transmits a black image. Change this setting. In the lower part of the main window you will see the boxes "Scenes", "Sources", "Mixer", etc. Click on the + under "Sources" in order to select a source to be displayed in your image. Possible sources are:

  • Window recording for programs, e.g. if you want to demonstrate the use of a software.
  • Video recording device, e.g. the PC camera or a connected webcam.
  • Browser window if something is to be shown directly on the Internet.

Enter a unique name for the selected sources, this makes it easier to select this source again later. You can also define "scenes" here later. Scenes allow you to adapt the software to different recordings situations and to switch between them (eg: Scene 1 "Exclusive Screen Recording", Scene 2: Recording of Screen and Webcam").

Step 3: Check sound and picture settings

In the lower area of ​​the main window you will see the "Mixer" box. Here you can check on which audio sources are currently selected. Here you can also adjust the volume of these sources or mute them. Start a recording and check whether the sound and image match.


You can find more information here.

How do I prepare and conduct a screen recording?

Before the screen recording
  • Test in advance whether the image and sound recording work as expected.
  • Have a glass of water ready for you.
  • Provide a quiet recording environment and also switch off interference sources on the computer (background processes, ad blockers, noise sources, system programs, etc.).
  • Limit the size and duration of your recording (ideally to 10-15 minutes). This makes it easier to do a good recording and it keeps the size of the MP4-file handy for upload and download.
Format of screen recording
  • Choose the recording area carefully to ensure that movements while recording wont be necessary. Avoid zooming and scrolling..
  • Select 16: 9 as image ratio. In PowerPoint this can be accomplished in "Draft | Video Size | Widescreen (16: 9).
  • Choose a video resolution that is above 640px360p, because too low a resolution is not suitable for a full screen view.
  • Save the videos preferably as an Mp4 file. 
While screen recording
  • After starting the recording, check whether the recording is really running (recording symbol).
  • Move the mouse cursor at a natural speed.
  • It is best to record one piece so that the timbre of the voice is uniform throughout the video.

How do I make the screen recording available to students?

You have the following options for integrating a screen-recording into MyLEARN:

  •     Upload it to the Lecturecasts application.
  •     Upload it directly into a learning activity via Media Insert | Upload media.
  •     Upload the video somewhere else (e.g. YouTube or Vimeo) and embed it in a learning activity using Media | Embed media.

Find detailed step-by-step instructions for this in the MyLEARN-Guide Chapter Lecturecasts.


A 3-minute screen capture video usually has a size of 200 MB. Videos up to 2GB (2048 MB) per video can be uploaded to MyLEARN. The speed of the upload to MyLEARN depends on your own bandwidth. The upload can take a few minutes or up to an hour for larger video files.