Daily Archives: August 17, 2018

How I Record My MOOC Lectures (Updated)

I am often asked how I record and produce my MOOC lectures.  I have used various technologies over time, but this is my current setup:

Video: Sony CX650 HD Camcorder

Set the camera’s “Micref level” to “Low” on the camcorder to avoid automatic gain control – and adjust audio in FCP/X.

My most recent audio setup uses an inexpensive shotgun microphone connected using a microphone arm .  I have done some experimentation with several mics of various brands and they all have too much noise during silent periods that is exacerbated because my camcorder has auto gain control.   But since I use Final Cut Pro anyways – the built in noise filter does a *really good job* cleaning up the noise.  Which makes recording really convenient.  I still use the built in Mac microphone for streaming and for screen recording – because its noise processing is better than my shotgun mic, camcorder or Final Cut pro.

Some of my previous approaches to audio include (1) Audio-Technica ATR3350 with a 3.5mm mono to 3.5mm stereo adapter so the camera records the mono microphone to both channels  to avoid a time consuming step in post or (2) just use the built-in Macintosh microphone, or (3) when I got tired of taking my microphone on and off when I need to get up and walk around I used a (very expensive) Sennheiser Omni-directional Wireless Lavalier Microphone.

Lighting is very important.  You need daylight balanced lights (blueish) because the cameras get their best video with these lights. If you want to soften your color balance – do it in post production.  Also if a little outside light leaks in – it blends better with daylight balanced lights.  I use Neewer 2×160 LED Dimmable lights.  The Softbox and ability to dim are both very important features because otherwise the shadows are very harsh.  With the softbox you can have the lights pretty close to you without weird shadows.  I set up the lights in a three point setup with the key light above and to the left of my camera.  I bought plug-in adapters because I did not want to mess with rechargeable lights.

Monitor: Wacom Cintiq 13HD – Allows me to scribble on the text

Screen Recording: Quicktime on the Mac – I always record in 720p resolution so the fonts and top nav bar are as visible as they can be.

Scribbling Software: My preference is OmniDazzle, but it is no longer available and each upgrade of MacOS/X breaks it in a different way.   My second choice is Ink2Go.  I want to be able to select a pen, change its color, and clear the screen all with keystrokes that I can program into the Wacom.  Ink2Go insists on leaving its UI somewhere on the screen – which is frustrating.  If Ink2Go cannot scribble on PowerPoint slides I use the built-in pen for PowerPoint – which is horrible – the lines are too thin and cannot be adjusted and colors cannot be changed with a hot key.  But it is better than nothing.

I edit everything on the Mac using Final Cut Pro. I switch between several views depending on the content.  I always use free / no attribution music available on the YouTube Audio Library – I prefer no acknowledgement required music and then I add an acknowledgment :)

In terms of shot selection, if I have powerpoint that is low complexity and I will be weaving a story I like split screen.  If the slide has material that I want the students to really focus on, I make the slide full screen.  If I am going to get philosophical or make a mini speech I take the video full screen.  I like full screen video towards the end as I wrap up.   In the last few seconds, I slip in some music and then add a slide at the end with a picture and pointer to my course web site and bring the music up full.  Watch from here to the end to see how I wrap up a video.

For demonstration videos I do everything 720P with full screen on the demo to maximize readability.  I don’t show any video of me during demos but I add music and the picture / web site slide at the end of each video to tie back to my web site.

I record all lectures twice.   I first record and edit my own copy of the lectures and publish them on YouTube with CC-BY and then when we move a course to Coursera we re-record the videos using the University of Michigan style.  The University of Michigan style goes back and forth between full-screen lecturer and full screen slides – they are optimizing for a smaller screen.  Their videos carry a CC-BY-NC license which is too limiting for me to achieve my Open Educational Resources goals.

I record my copies lectures in my home office, my work office and even sometimes in a hotel room or at a beach.  I think it adds intimacy and interest.   The University of Michigan lectures are all in a studio with the same camera framing, perfect lighting and nothing in the background.  The UM quality is very high and results in a more polished video.   Ultimately there is much to like in both styles of videos.

I record the demos once and use them both in my open courses and Coursera.  It turns out that with the right microphones, you can get decent audio – but pretty video is much harder.   So the “no instructor video” strategy works well for demos.

I know this sounds like a lot of effort – but the resulting videos have a very long shelf life and the videos I produce and own can be published through a wide range of outlets to accomplish my sharing of OER content goals.

I hope you find this useful for your own lecture recording.