| Vimalkumar Velayudhan
I published my first online course on Udemy recently. It is about creating a website and blog (like this one) using programs written in Python. This post is about the software I used for creating course content - screencasts with audio, lecture notes and an eBook. This was done on an Ubuntu Linux machine with free and open source software.
This course is now published on this website. You can access it by visiting Build & Deploy a Website using Pelican.
Recording Screencasts with Kazam
For recording screencasts (recording actions on the desktop), I used Kazam. It is available in the Ubuntu software center. I saved the output as H264 (MP4).
These shorcuts were useful
CTRL + Super (Win) + R - Start recording
CTRL + SUPER (Win) + F - Finish recording
Recording Audio with Sound Recorder
For recording audio, I used the sound recorder app on my Phone. Here are the settings I used
Editing Audio with Audacity
I imported the *.ogg files produced from the recording into Audacity. Audacity is available in the Ubuntu software center. For Windows, you can download the installation package from Audacity's website.
For processing the audio, I followed instructions from this youtube video. At times, noise removal alone was sufficient to get nice sounding audio. I also removed (CTRL + X) or silenced (Edit --> Remove Audio or Labels --> Silence Audio) parts of the audio that I didn't need.
Editing Videos with Blender
Blender could be overwhelming at first. Here is a tutorial on using the video editing feature.
- Right click to select a clip (video or audio).
- Right click and drag to move a clip.
- Use mouse wheel to Zoom in/out.
- Use CTRL + mouse wheel to move the view port.
- X to remove a clip (when selected with a right click).
- K to soft trim a clip. The clip can then be resized later.
- SHIFT + K to trim a clip.
eBook and Lecture Notes
For the slide presentation in the promo/intro video, I used reveal.js.