bad-apple-manim

Recreating Bad Apple in the style of a 3Blue1Brown video.

Final video: https://www.youtube.com/watch?v=t0N0dZTsn-w

Making the video:

video_to_svg.ipynb does the following:

• Uses OpenCV to convert the original Bad Apple video into a series of PNG files.
• Uses PIL to convert the PNGs into bitmaps
• Uses potrace (not pypotrace, the Python library was a nightmare) to convert the bitmaps into SVGs
• Adds a rectangle around each SVG frame to fix Manim's auto-scaling

Then, base_video.py uses Manim (3b1b's animation library) to render the SVGs into a video.

The command to render is manim -pqh base_video.py BadApple1261CirclesThickFillCentered --disable_caching.

This renders a preliminary video, to save time with processing for the greater video which has other effects.

The other video is rendered from main_advanced.py, using manim -pqh main_advanced.py MyScene, this is the one with all the mathematical effects like the differentiation, integration, fourier series, and vector fields.

Some other stuff in the order that they were used:

• I used https://github.com/xnx/circle-packing to generate the circle packing for level 2.
• quote.py: used to render the quote at the beginning of the video -center_of_masses.ipynb: used to pre-compute the center of masses of every frame to use in level 5 -fourier_series.ipynb: used to test the Fourier Series using the coordinate system of the video, for level 4
• efield-precompute.py: used to precompute the electric field vectors for the main video in level 6.
• lorentz-coulomb.ipynb and lorentz-coulomb.py: used to render the last section of the video, level 7. This particular section made me use finite difference methods and the Lienard-Wiechart potentials from Griffith's Electrodynamics book, which was simultaneously really fun and really hard.
• I tried doing a section with optical flow (optical_flow_test.py), but the algorithms didn't work well with the two-colored videos.

Making the audio:

• I split Bad Apple's audio into Vocals using a combination of mvsep.com and Ultimate Vocal Remover. Both are free.
• I created a model of 3b1b's voice using so-vits-svc-fork.
• Slapped it all together in Premiere Pro.