Simple Stop Motion with ffmpeg

Andrew Lindesay has a nice script for simple script for using ffmpeg to do stop motion:


ffmpeg -framerate 10 \
-pattern_type glob -i '*.JPG' \
-vf scale=640:-1 -c:v libx264 -pix_fmt yuv420p \
out.mp4


This works great for compiling photos shot by a GoPro!
The shots are labelled chronologically by frame number:


G0107340.JPG
G0107341.JPG
G0107342.JPG
G0107343.JPG
G0107344.JPG
G0107345.JPG
G0107346.JPG
G0107347.JPG
G0107348.JPG
G0107349.JPG


So, the -pattern_type glob -i '*.JPG' argument picks them up in order.

The argument scale 640:-1 automatically resizes frames to 640xY and preserves the aspect ratio. This might not be what you want, but it makes for small videos.

Bruce and Katharine Cornwell Films

Bruce and Katharine Cornwell produced beautiful animations of mathematics back in the 1960s. I watched the first couple minutes of their film “Possibly So, Pythagoras” (1963) and learned half a dozen pleasant things.

Check out their films, available on Vimeo here.

You can read the memorial from Reed College here.

The Nature of Things: Martin Gardner

Polya on Guessing

Polya Guessing from ihor charischak on Vimeo.

STLHE 2018 — Day 1 — Pre-Conference

Lots of great ideas today! Ahg! It was amazing. I went to a workshop on conducting SoTL research. That was the first session of the pre-conference, and it made the whole conference worth while. I am thrilled.

Some great references and guides:

• Calgary Guide to SoTL (Yo! Mike Pawliuk!)
• Vanderbuilt Guide to SoTL

Journals that are highly connected to the conference:

• Canadian Journal for the Scholarship of Teaching and Learning
• Collected Essays on Learning and Teaching

Some reference to track down in Toronto:

• Creswell, J.W. (2013). Qualitative inquiry and research design: choosing among five approaches.
• Louis Cohen, Lawrence Manion, and Keith Morrison (2011). Research methods in education.
• Martella Ronald , Nelson J Ron , Morgan Robert et al. (2013). Understanding and Interpreting Educational Research

STLHE 2018 — Day 0 — Introduction

I am currently at Scholarship of Teaching and Learning in Higher Education 2018 in Sherbrooke, QC. The plan is to post a short little video everyday of the conference to keep people updated on how things are going. Stay tuned!

Final Poster Presentation Demo

String Figure: Outrigged Canoe

As part of my current highschool mentorship project on string figures, I’m recording string figures that we study. Here are two views of the figure, Outrigged Canoe, which one looks better to you?