manim-video

Manim Video Production Pipeline

When to use

Use when users request: animated explanations, math animations, concept visualizations, algorithm walkthroughs, technical explainers, 3Blue1Brown style videos, or any programmatic animation with geometric/mathematical content. Creates 3Blue1Brown-style explainer videos, algorithm visualizations, equation derivations, architecture diagrams, and data stories using Manim Community Edition.

Creative Standard

This is educational cinema. Every frame teaches. Every animation reveals structure.

Before writing a single line of code, articulate the narrative arc. What misconception does this correct? What is the "aha moment"? What visual story takes the viewer from confusion to understanding? The user's prompt is a starting point — interpret it with pedagogical ambition.

Geometry before algebra. Show the shape first, the equation second. Visual memory encodes faster than symbolic memory. When the viewer sees the geometric pattern before the formula, the equation feels earned.

First-render excellence is non-negotiable. The output must be visually clear and aesthetically cohesive without revision rounds. If something looks cluttered, poorly timed, or like "AI-generated slides," it is wrong.

Opacity layering directs attention. Never show everything at full brightness. Primary elements at 1.0, contextual elements at 0.4, structural elements (axes, grids) at 0.15. The brain processes visual salience in layers.

Breathing room. Every animation needs self.wait() after it. The viewer needs time to absorb what just appeared. Never rush from one animation to the next. A 2-second pause after a key reveal is never wasted.

Cohesive visual language. All scenes share a color palette, consistent typography sizing, matching animation speeds. A technically correct video where every scene uses random different colors is an aesthetic failure.

Prerequisites

Run scripts/setup.sh to verify all dependencies. Requires: Python 3.10+, Manim Community Edition v0.20+ (pip install manim), LaTeX (texlive-full on Linux, mactex on macOS), and ffmpeg. Reference docs tested against Manim CE v0.20.1.

Modes

| Mode | Input | Output | Reference | |------|-------|--------|-----------| | Concept explainer | Topic/concept | Animated explanation with geometric intuition | references/scene-planning.md | | Equation derivation | Math expressions | Step-by-step animated proof | references/equations.md | | Algorithm visualization | Algorithm description | Step-by-step execution with data structures | references/graphs-and-data.md | | Data story | Data/metrics | Animated charts, comparisons, counters | references/graphs-and-data.md | | Architecture diagram | System description | Components building up with connections | references/mobjects.md | | Paper explainer | Research paper | Key findings and methods animated | references/scene-planning.md | | 3D visualization | 3D concept | Rotating surfaces, parametric curves, spatial geometry | references/camera-and-3d.md |

Stack

Single Python script per project. No browser, no Node.js, no GPU required.

| Layer | Tool | Purpose | |-------|------|---------| | Core | Manim Community Edition | Scene rendering, animation engine | | Math | LaTeX (texlive/MiKTeX) | Equation rendering via MathTex | | Video I/O | ffmpeg | Scene stitching, format conversion, audio muxing | | TTS | ElevenLabs / Qwen3-TTS (optional) | Narration voiceover |

Pipeline

PLAN --> CODE --> RENDER --> STITCH --> AUDIO (optional) --> REVIEW

1. PLAN — Write plan.md with narrative arc, scene list, visual elements, color palette, voiceover script
2. CODE — Write script.py with one class per scene, each independently renderable
3. RENDER — manim -ql script.py Scene1 Scene2 ... for draft, -qh for production
4. STITCH — ffmpeg concat of scene clips into final.mp4
5. AUDIO (optional) — Add voiceover and/or background music via ffmpeg. See references/rendering.md
6. REVIEW — Render preview stills, verify against plan, adjust

Project Structure

project-name/
  plan.md                # Narrative arc, scene breakdown
  script.py              # All scenes in one file
  concat.txt             # ffmpeg scene list
  final.mp4              # Stitched output
  media/                 # Auto-generated by Manim
    videos/script/480p15/

Creative Direction

Color Palettes

| Palette | Background | Primary | Secondary | Accent | Use case | |---------|-----------|---------|-----------|--------|----------| | Classic 3B1B | #1C1C1C | #58C4DD (BLUE) | #83C167 (GREEN) | #FFFF00 (YELLOW) | General math/CS | | Warm academic | #2D2B55 | #FF6B6B | #FFD93D | #6BCB77 | Approachable | | Neon tech | #0A0A0A | #00F5FF | #FF00FF | #39FF14 | Systems, architecture | | Monochrome | #1A1A2E | #EAEAEA | #888888 | #FFFFFF | Minimalist |

Animation Speed

| Context | run_time | self.wait() after | |---------|----------|-------------------| | Title/intro appear | 1.5s | 1.0s | | Key equation reveal | 2.0s | 2.0s | | Transform/morph | 1.5s | 1.5s | | Supporting label | 0.8s | 0.5s | | FadeOut cleanup | 0.5s | 0.3s | | "Aha moment" reveal | 2.5s | 3.0s |

Typography Scale

| Role | Font size | Usage | |------|-----------|-------| | Title | 48 | Scene titles, opening text | | Heading | 36 | Section headers within a scene | | Body | 30 | Explanatory text | | Label | 24 | Annotations, axis labels | | Caption | 20 | Subtitles, fine print |

Fonts

Use monospace fonts for all text. Manim's Pango renderer produces broken kerning with proportional fonts at all sizes. See references/visual-design.md for full recommendations.

MONO = "Menlo"  # define once at top of file

Text("Fourier Series", font_size=48, font=MONO, weight=BOLD)  # titles
Text("n=1: sin(x)", font_size=20, font=MONO)                  # labels
MathTex(r"\nabla L")                                            # math (uses LaTeX)

Minimum font_size=18 for readability.

Per-Scene Variation

Never use identical config for all scenes. For each scene:

• Different dominant color from the palette
• Different layout — don't always center everything
• Different animation entry — vary between Write, FadeIn, GrowFromCenter, Create
• Different visual weight — some scenes dense, others sparse

Workflow

Step 1: Plan (plan.md)

Before any code, write plan.md. See references/scene-planning.md for the comprehensive template.

Step 2: Code (script.py)

One class per scene. Every scene is independently renderable.

from manim import *

BG = "#1C1C1C"
PRIMARY = "#58C4DD"
SECONDARY = "#83C167"
ACCENT = "#FFFF00"
MONO = "Menlo"

class Scene1_Introduction(Scene):
    def construct(self):
        self.camera.background_color = BG
        title = Text("Why Does This Work?", font_size=48, color=PRIMARY, weight=BOLD, font=MONO)
        self.add_subcaption("Why does this work?", duration=2)
        self.play(Write(title), run_time=1.5)
        self.wait(1.0)
        self.play(FadeOut(title), run_time=0.5)

Key patterns:

• Subtitles on every animation: self.add_subcaption("text", duration=N) or subcaption="text" on self.play()
• Shared color constants at file top for cross-scene consistency
• self.camera.background_color set in every scene
• Clean exits — FadeOut all mobjects at scene end: self.play(FadeOut(Group(*self.mobjects)))

Step 3: Render

manim -ql script.py Scene1_Introduction Scene2_CoreConcept  # draft
manim -qh script.py Scene1_Introduction Scene2_CoreConcept  # production

Step 4: Stitch

cat > concat.txt << 'EOF'
file 'media/videos/script/480p15/Scene1_Introduction.mp4'
file 'media/videos/script/480p15/Scene2_CoreConcept.mp4'
EOF
ffmpeg -y -f concat -safe 0 -i concat.txt -c copy final.mp4

Step