You cannot create a white screen during the recording (but you can do so during a live presentation). Using the hotkeys for drawing pen and the “laser” pointer is helpful during recording.The editing you can do this way is quite limited, and often causes a crash of PPT (at least in my case). You can trim the voice recording on each slide by clicking the speaker icon on the slide and use Audio Tools -> Playback.If you want to just change the recording for one item on the slide, it is basically impossible without recording the whole thing again. However, I do not recommend doing so in general, since the narration in the same slide is recorded as a single file. To overcome the above drawback, you may make serval images appear one after another in one slide by animation upon clicks.This becomes more noticeable if you use lots of \pause for your listed items in the beamer-based PDF slides. There is a short gap in voice recording during the transitions of the slides.Powerpoint itself can convert the narrated file into a reasonable MP4 video, and the PPT file (much smaller than the video) is also helpful for many since it can be played in Powerpoint.A slide is simply an image thus you don’t have the trouble of converting -generated formulas, compared to methods turning a beamer-generated PDF into a PPT file directly.The video camera can be turned on and off as you wish (at a corner of your slides). You can record/edit each slide individually.No video editing experience/software is required.Compress (or adjust slightly) the video using some (open-source) software like HandBrake, if needed.You can stop at any moment, and redo any slide individually. *Record your lecture using Slide Show -> Record Slide Show with your drawings (and the camera video of yourself).Delete the title page of the album, and make the images full-page by adjusting the size of the slides by Design -> Slide Size.*Create a new presentation in Powerpoint and import the image files by Insert -> Photo Album (a new page for each picture).You can choose the suitable resolution of the exported JPGs. Export the slides as a collection of JPG image files.Prepare your slides in PDF using (usually beamerclass).See below the tips for Mac users about the touch screen. Preferably a pen tablet or a touch screen (for drawings/writings to explain the technical/mathematical contents).For Mac users, it perhaps worths installing a Windows 10 virtual machine. The latest Mac version (16.35) still lacks features that are crucial for recording a technical lecture (the stared steps below). Powerpoint ( Windows version, preferably Office 2019 edition).Many thanks! BTW our university bought group licenses of the relevant Microsoft software mentioned below.) (The general method of using PPT with exported images of a PDF was recommended to me by my colleague Shengyang Zhong based on a Zhihu post. The results have not been that great but some students do appreciate the video lectures: at least they can double or triple the playing speed if bored… Respect to all the MOOC teachers…Īnyway, after recording my lectures on Modal Logic for almost the whole semester, below is what I have settled down with… It is perhaps the simplest but easy-to-edit solution for recording ( -generated) technical lectures (on a Mac) without requiring any experience in video editing (though see tips below for tricky things). It took me much much more time than I expected to record the lectures. about the preferred teaching method during the outbreak. ![]() ![]() ![]() Retrospectively, I chose the “wrong” option of recording my lectures than simply doing live online teaching when the university asked us in Feb.
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