Automatically generate topic transition video segments programmatically

[StevenTammen]

Will be a bit involved.

I already programmatically generate topic transition slides with the with the remarkjs Markdown-based slides library. But to support automatically creating the topic transition video segments, I'll need to:

• Figure out how to generate a 16:9 image with the resolution of 1920 x 1080 for each slide
• Figure out how to create 3.00 second duration (adjustable) topic transition video segments. Will use ffmpeg to turn the static images into videos at the appropriate frame rate.
• Figure out how to update the function that combines video segments to give these topic transition segments a dummy audio track so that the video concatenation via ffmpeg filter will work properly
• Test thoroughly