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feat: add Manim promo video generation workflow
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‎.github/workflows/video-build.yml‎

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name: Build Promo Video
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on:
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push:
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branches: [master, main]
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paths:
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- 'promo/**'
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release:
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types: [published]
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workflow_dispatch:
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concurrency:
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group: video-${{ github.ref }}
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cancel-in-progress: true
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permissions:
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contents: write
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jobs:
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render-video:
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name: Render Promo Video
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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- name: Set up Python
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uses: actions/setup-python@v5
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with:
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python-version: '3.11'
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- name: Install Manim & dependencies
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run: |
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sudo apt-get update
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sudo apt-get install -y ffmpeg libcairo2-dev libpango1.0-dev
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pip install manim==0.18.1
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- name: Render promo video (1080p)
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run: |
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cd promo
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manim render -qh --format mp4 promo_scene.py ProductPromo
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echo "Video rendered"
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- name: Render social media variants
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run: |
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cd promo
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# Square (1080x1080) for Instagram/LinkedIn
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manim render -qh --format mp4 \
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--resolution 1080,1080 \
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promo_scene.py ProductPromo \
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-o ebuild_square.mp4 || true
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echo "Social variants rendered"
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- name: List outputs
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run: |
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echo "=== Generated Videos ==="
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find promo/media -name "*.mp4" -exec ls -lh {} \;
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- name: Upload video artifacts
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uses: actions/upload-artifact@v4
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with:
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name: promo-videos
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path: promo/media/videos/**/*.mp4
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retention-days: 90
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- name: Attach to release
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if: github.event_name == 'release'
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uses: softprops/action-gh-release@v2
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with:
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files: promo/media/videos/**/*.mp4
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tag_name: ${{ github.event.release.tag_name }}
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fail_on_unmatched_files: false
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env:
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GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
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summary:
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name: Video Build Summary
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runs-on: ubuntu-latest
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needs: render-video
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if: always()
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steps:
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- name: Report
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run: |
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echo "## Promo Video Build" >> $GITHUB_STEP_SUMMARY
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echo "" >> $GITHUB_STEP_SUMMARY
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echo "| Detail | Value |" >> $GITHUB_STEP_SUMMARY
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echo "|--------|-------|" >> $GITHUB_STEP_SUMMARY
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echo "| Product | ebuild |" >> $GITHUB_STEP_SUMMARY
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echo "| Render | ${{ needs.render-video.result }} |" >> $GITHUB_STEP_SUMMARY
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echo "| Trigger | ${{ github.event_name }} |" >> $GITHUB_STEP_SUMMARY

‎promo/promo_scene.py‎

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from manim import *
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class ProductPromo(Scene):
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"""ebuild — promotional video."""
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def construct(self):
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self.camera.background_color = "#0f172a"
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accent = "#16a34a"
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# ── Scene 1: Logo Reveal ──
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title = Text("ebuild", font_size=96, color=WHITE, weight=BOLD)
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tagline = Text(
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"EoS Embedded Build System",
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font_size=32, color=GRAY_B,
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)
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tagline.next_to(title, DOWN, buff=0.6)
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self.play(Write(title), run_time=1.5)
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self.play(FadeIn(tagline, shift=UP * 0.3), run_time=0.8)
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self.wait(2)
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self.play(FadeOut(title), FadeOut(tagline))
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# ── Scene 2: Feature Showcase ──
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features = [
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"Cross-Compilation Toolchains",
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"Incremental Builds",
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"Dependency Resolution",
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]
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for i, feat in enumerate(features):
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num = Text(
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f"0{i+1}", font_size=120, color=accent, weight=BOLD, font="Monospace",
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).set_opacity(0.15)
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num.to_edge(LEFT, buff=1.5).shift(UP * 0.5)
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feat_text = Text(feat, font_size=52, color=WHITE, weight=BOLD)
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feat_text.next_to(num, RIGHT, buff=0.8).align_to(num, UP)
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bar = Rectangle(
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width=8, height=0.06, color=accent, fill_opacity=1,
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)
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bar.next_to(feat_text, DOWN, buff=0.3, aligned_edge=LEFT)
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self.play(
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FadeIn(num, shift=RIGHT * 0.5),
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Write(feat_text),
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GrowFromEdge(bar, LEFT),
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run_time=1.0,
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)
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self.wait(1.5)
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self.play(FadeOut(num), FadeOut(feat_text), FadeOut(bar), run_time=0.5)
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# ── Scene 3: Architecture Flash ──
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arch_title = Text("Architecture", font_size=28, color=GRAY_B)
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arch_title.to_edge(UP, buff=0.8)
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boxes = VGroup()
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labels = ["Core", "API", "Runtime"]
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for j, lbl in enumerate(labels):
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box = RoundedRectangle(
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corner_radius=0.15, width=2.5, height=1.2,
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stroke_color=accent, fill_color="#1e293b", fill_opacity=1,
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)
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box_label = Text(lbl, font_size=22, color=WHITE)
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box_label.move_to(box)
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grp = VGroup(box, box_label)
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boxes.add(grp)
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boxes.arrange(RIGHT, buff=0.6)
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arrows = VGroup()
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for j in range(len(boxes) - 1):
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arr = Arrow(
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boxes[j].get_right(), boxes[j + 1].get_left(),
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color=accent, buff=0.1, stroke_width=2,
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)
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arrows.add(arr)
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self.play(FadeIn(arch_title))
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self.play(LaggedStart(*[FadeIn(b, shift=UP * 0.3) for b in boxes], lag_ratio=0.2))
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self.play(LaggedStart(*[GrowArrow(a) for a in arrows], lag_ratio=0.15))
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self.wait(2)
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self.play(FadeOut(arch_title), FadeOut(boxes), FadeOut(arrows))
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# ── Scene 4: CTA ──
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cta = Text("ebuild", font_size=72, color=WHITE, weight=BOLD)
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url = Text(
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"github.com/embeddedos-org/ebuild",
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font_size=24, color=accent,
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)
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url.next_to(cta, DOWN, buff=0.5)
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badge = Text("Open Source", font_size=18, color=GRAY_B)
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badge.next_to(url, DOWN, buff=0.4)
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self.play(Write(cta), run_time=1.0)
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self.play(FadeIn(url, shift=UP * 0.2))
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self.play(FadeIn(badge, shift=UP * 0.2))
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self.wait(3)

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