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説明動画制作ガイド

スクリプト作成から最終編集までの説明動画制作を支援します。スクリプトの公式、ペーシングルール、シーン計画、マルチツールパイプラインをカバー。製品デモ、仕組み紹介、オンボーディング動画、ソーシャル解説動画に最適です。

説明動画制作ガイド とは?

このスキルは、belt CLIとinference.shの各種AIアプリを活用して、高品質な説明動画を効率的に制作するための包括的なガイドです。PAS(問題-扇動-解決)やBAB(Before-After-Bridge)といった実績のあるスクリプトフレームワーク、コンテンツタイプ別の適切な話速、シーン継続時間の目安など、プロの動画制作に必要な知識を体系的に提供します。Visual Production、Voiceover Production、Music & Audio、Assembly Pipelineの各セクションでは、具体的なコマンド例とともに、動画生成、音声合成、BGM作成、合成処理といった各工程をbelt CLIで完結させる方法を示しています。特に、複数のシーンを並行生成し、後工程で結合するパイプラインは、大規模な動画制作の工数を大幅に削減できます。対応プラットフォームはinference.sh CLIであり、Google Veo、ByteDance Seedance、Fal AI Flux、Dia TTSなど、最先端のAIモデルをワンストップで利用できます。よくある失敗例やその対策、プラットフォーム別の推奨尺など、実践的な知見も豊富に含まれており、初心者からプロまで幅広く活用できます。

対応~Claude Code~Codex CLI~Cursor
npx skills add https://github.com/101-skills/superpowers/tree/HEAD/guides/video/explainer-video-guide

お気に入りのAIに質問する

このエージェントスキルを事前に読み込んだ状態で新しいチャットを開きます。

ドキュメント

belt CLIスキルをインストール: npx skills add belt-sh/cli

説明動画ガイド

inference.sh CLIを使って、スクリプトから最終カットまで説明動画を作成します。

クイックスタート

inference.sh CLI(belt)が必要です。インストール手順

belt login

# 説明動画のシーンを生成
belt app run google/veo-3-1-fast --input '{
  "prompt": "Clean motion graphics style animation, abstract data flowing between connected nodes, blue and white color scheme, professional corporate aesthetic, smooth transitions"
}'

スクリプト公式

PAS(問題-扇動-解決)— 60秒

セクション時間内容単語数
問題10秒視聴者が抱える問題点を提示~25単語
扇動10秒問題が思っているより深刻であることを示す~25単語
解決15秒製品/アイデアを紹介~35単語
仕組み20秒3つの主要ステップまたは機能を示す~50単語
CTA5秒明確な次のアクションを一つ~12単語

BAB(Before-After-Bridge)— 90秒

セクション時間内容
Before15秒現在のフラストレーションがたまる状態を示す
After15秒理想的な結果を示す
Bridge40秒製品がどのようにしてそこに到達させるかを説明
社会的証明10秒簡単な統計やお客様の声
CTA10秒明確な次のステップ

フィーチャースポットライト — 30秒(ソーシャル向け)

セクション時間内容
フック3秒驚きの事実または質問
機能15秒一つの機能が一つの問題を解決する様子を示す
結果7秒成果/メリット
CTA5秒試してみる / 詳細を見る

ペーシングルール

コンテンツタイプ語数/分備考
標準ナレーション150 wpm会話的なペース
複雑/技術的120 wpm処理時間を確保
活発/ソーシャル170 wpm短尺コンテンツ向けに速め
子供向けコンテンツ100 wpmはっきりとゆっくり

重要なルール: 1シーンに1つのキーメッセージ。一つのビジュアルに複数のアイデアを詰め込まない。

シーン継続時間の目安

  • 導入ショット: 3~5秒
  • 機能デモンストレーション: 5~8秒
  • テキスト/統計オンスクリーン: 3~4秒(読みやすいこと)
  • トランジション: 0.5~1秒
  • CTA画面: 3~5秒

ビジュアル制作

シーンタイプ

# 製品のコンテキスト
belt app run google/veo-3-1-fast --input '{
  "prompt": "Clean product demonstration video, hands typing on a laptop showing a dashboard interface, bright modern office, soft natural lighting, professional"
}'

# 抽象的概念の可視化
belt app run bytedance/seedance-2-0 --input '{
  "prompt": "Abstract motion graphics, colorful data streams connecting floating geometric shapes, smooth fluid animation, dark background with glowing elements, tech aesthetic",
  "generate_audio": true
}'

# ライフスタイル/成果ショット
belt app run google/veo-3-1-fast --input '{
  "prompt": "Happy person relaxing on couch with laptop, smiling at screen, bright airy living room, warm afternoon light, satisfied customer feeling, lifestyle commercial style"
}'

# Before/After比較
belt app run falai/flux-dev-lora --input '{
  "prompt": "Split screen comparison, left side cluttered messy desk with papers and stress, right side clean organized minimalist workspace, dramatic difference, clean design"
}'

シーンの静止画から動画へ

# まず静止フレームを生成
belt app run falai/flux-dev-lora --input '{
  "prompt": "Professional workspace with glowing holographic interface, futuristic but clean, blue accent lighting"
}'

# それを動かす
belt app run falai/wan-2-5-i2v --input '{
  "prompt": "Gentle camera push in, holographic elements subtly floating and rotating, soft ambient light shifts",
  "image": "path/to/workspace-still.png"
}'

音声制作

スクリプト作成のヒント

  • 短い文。1文最大15単語。
  • 能動態。「あなたはデータを追跡できます」であって「あなたのデータは追跡できます」ではない。
  • 会話調。声に出して読んでみて、堅苦しければ書き直す。
  • 一文につき一つのアイデア。一つのビジュアルビートにつき一文。

音声の生成

# Dia TTSによるプロフェッショナルナレーション
belt app run falai/dia-tts --input '{
  "prompt": "[S1] Tired of spending hours on reports that nobody reads? There is a better way. Meet DataFlow. It turns your raw data into visual stories... in seconds. Just connect your source, pick a template, and share. Try DataFlow free today."
}'

TTSのペーシング制御

テクニック効果例
ピリオド .中程度のポーズ「これですべてが変わります。方法をお見せします。」
三点リーダー ...長いポーズ(劇的に)「そしてその結果は...驚くべきものでした。」
カンマ ,短いポーズ「速く、シンプルで、強力です。」
感嘆符 !強調/エネルギー「今すぐ構築を始めましょう!」
疑問符 ?上昇調のイントネーション「もっと良い方法があったとしたら?」

音楽とオーディオ

背景音楽のガイドライン

  • 音量: ナレーションの20~30%(音声再生時は6~12dB下げる)
  • スタイル: ブランドトーンに合わせる(企業=アンビエントエレクトロニック、スタートアップ=アップビートなインディー)
  • 構成: イントロスウェル(最初の3秒)→ ナレーション下の控えめなループ → CTAでのスウェル
  • ボーカルなし: ナレーション下ではインストゥルメンタルのみ
# BGMを生成
belt app run <music-gen-app> --input '{
  "prompt": "upbeat corporate background music, modern electronic, 90 BPM, positive and professional, no vocals, suitable for product explainer video"
}'

アセンブリパイプライン

本番制作ワークフロー

# 1. 音声を生成
belt app run falai/dia-tts --input '{
  "prompt": "[S1] ここにスクリプトを入力..."
}'

# 2. シーンのビジュアルを生成(並行処理)
belt app run google/veo-3-1-fast --input '{"prompt": "シーン1の説明"}' --no-wait
belt app run google/veo-3-1-fast --input '{"prompt": "シーン2の説明"}' --no-wait
belt app run google/veo-3-1-fast --input '{"prompt": "シーン3の説明"}' --no-wait

# 3. シーンを結合
belt app run infsh/media-merger --input '{
  "media": ["scene1.mp4", "scene2.mp4", "scene3.mp4"]
}'

# 4. 動画に音声を追加
belt app run infsh/video-audio-merger --input '{
  "video": "merged-scenes.mp4",
  "audio": "voiceover.mp3"
}'

# 5. キャプションを追加
belt app run infsh/caption-videos --input '{
  "video": "final-with-audio.mp4",
  "caption_file": "captions.srt"
}'

動画の長さとフォーマット

フォーマット長さプラットフォーム
ソーシャルティーザー15~30秒TikTok, Instagram Reels, YouTube Shorts
製品デモ60~90秒ウェブサイト, ランディングページ
機能説明90~120秒YouTube, メール
チュートリアル/ウォークスルー2~5分YouTube, ヘルプセンター
投資家用ピッチ動画2~3分ピッチデッキの補足

トランジションの種類

トランジション使用タイミング効果
カット関連シーン間のデフォルトクリーンでプロフェッショナル
ディゾルブ/クロスフェード時間経過、ムード変化柔らかく、物思いにふける
ワイプ新しいトピックやセクション明確な区切り
ズーム/プッシュ詳細へのドリルイン注目を集める
マッチカットシーン間の視覚的類似性賢く、記憶に残る

よくある失敗

失敗問題修正
スクリプトが冗長ナレーションが早すぎ、視聴者が圧倒される最大150 wpmに削減
最初の3秒にフックがない視聴者がすぐに離脱問題または驚きの統計から始める
ビジュアルがナレーションに遅れる混乱する不連続ビジュアルは言葉と一致するか、やや先行させる
BGMが大きすぎるナレーションが聞こえない音声下で音楽を6~12dB下げる
キャプションがないソーシャル動画の85%は無音視聴常にキャプションを追加
アイデアが多すぎる視聴者は何も覚えていない動画ごとにコアメッセージは一つ

関連スキル

npx skills add inference-sh/skills@ai-video-generation
npx skills add inference-sh/skills@video-prompting-guide
npx skills add inference-sh/skills@text-to-speech
npx skills add inference-sh/skills@prompt-engineering

すべてのアプリを表示: belt app list

Individual skills in this repo

This repo contains 20 individual skills — each has its own dedicated page.

101-skills/superpowers

Build automated AI workflows combining multiple models and services. Patterns: batch processing, scheduled tasks, event-driven pipelines, agent loops. Tools: inference.sh CLI, bash scripting, Python SDK, webhook integration. Use for: content automation, data processing, monitoring, scheduled generation. Triggers: ai automation, workflow automation, batch processing, ai pipeline, automated content, scheduled ai, ai cron, ai batch job, automated generation, ai workflow, content at scale, automation script, ai orchestration

101-skills/superpowers

Build multi-step AI content creation pipelines combining image, video, audio, and text. Workflow examples: generate image -> animate -> add voiceover -> merge with music. Tools: FLUX, Veo, Kokoro TTS, OmniHuman, media merger, upscaling. Use for: YouTube videos, social media content, marketing materials, automated content. Triggers: content pipeline, ai workflow, content creation, multi-step ai, content automation, ai video workflow, generate and edit, ai content factory, automated content creation, ai production pipeline, media pipeline, content at scale

101-skills/superpowers

Create AI-powered podcasts with text-to-speech, music, and audio editing. Tools: Kokoro TTS, DIA TTS, Chatterbox, AI music generation, media merger. Capabilities: multi-voice conversations, background music, intro/outro, full episodes. Use for: podcast production, audiobooks, voice content, audio newsletters. Triggers: podcast, ai podcast, text to speech podcast, audio content, voice over, ai audiobook, multi voice, conversation ai, notebooklm alternative, audio generation, podcast automation, ai narrator, voice content, audio newsletter, podcast maker

101-skills/superpowers

Generate multi-person talking head podcast videos from scratch using AI — character creation, TTS, avatar animation, and video stitching. Use when the user wants to create a podcast, talking head video, or multi-speaker conversation video.

101-skills/superpowers

Content atomization — turn one piece of content into many formats. Covers blog-to-thread, blog-to-carousel, podcast-to-blog, video-to-quotes, and more. Use for: content marketing, social media, multi-platform distribution, content strategy. Triggers: content repurposing, repurpose content, content atomization, content recycling, one to many content, multi platform content, cross post, adapt content, reformat content, blog to thread, blog to video, podcast to blog, content multiplication

101-skills/superpowers

App Store and Google Play screenshot creation with exact platform specs. Covers iOS/Android dimensions, gallery ordering, device mockups, and preview videos. Use for: app store optimization, ASO, app screenshots, app preview, play store listing. Triggers: app store screenshots, aso, app store optimization, play store screenshots, app preview, app listing, ios screenshots, android screenshots, app store images, app mockup, device mockup, app gallery, store listing

101-skills/superpowers

Book cover design with genre-specific conventions, typography rules, and AI image generation. Covers fiction and non-fiction genres, sizing, thumbnail testing, and iteration workflows. Use for: self-publishing, ebook covers, print covers, audiobook covers, cover mockups. Triggers: book cover, cover design, ebook cover, book art, novel cover, self publishing cover, kindle cover, audiobook cover, book jacket, cover illustration, fiction cover, nonfiction cover

101-skills/superpowers

Character consistency across AI-generated images with reference sheets and LoRA techniques. Covers turnaround views, expression sheets, color palettes, and style consistency tricks. Use for: character design, game art, illustration, animation, comics, visual novels. Triggers: character design, character sheet, character consistency, character reference, turnaround sheet, expression sheet, character art, consistent character, character concept, reference sheet, character creation, oc design, character bible

101-skills/superpowers

Data visualization with chart selection, color theory, and annotation best practices. Covers chart types (bar, line, scatter, heatmap), axes rules, and storytelling with data. Use for: charts, graphs, dashboards, reports, presentations, infographics, data stories. Triggers: data visualization, chart, graph, data chart, bar chart, line chart, scatter plot, data viz, visualization, dashboard chart, infographic data, data presentation, chart design, plot, heatmap, pie chart alternative

101-skills/superpowers

Email marketing design with layout patterns, subject line formulas, and deliverability rules. Covers welcome sequences, promotional emails, transactional templates, and mobile optimization. Use for: email marketing, newsletter design, drip campaigns, email templates, transactional emails. Triggers: email design, email template, email marketing, newsletter design, email layout, email campaign, drip campaign, welcome email, promotional email, transactional email, email subject line, email header image, email banner

101-skills/superpowers

Landing page conversion optimization with layout rules, hero section design, and CTA psychology. Covers above-the-fold formula, social proof placement, mobile design, and F-pattern reading. Use for: startup landing pages, product pages, SaaS marketing, conversion optimization. Triggers: landing page, hero section, above the fold, conversion optimization, landing page design, cta button, hero image, landing page layout, saas landing page, product page design, conversion rate, landing page best practices

101-skills/superpowers

Logo design principles and AI image generation best practices for creating logos. Covers logo types, prompting techniques, scalability rules, and iteration workflows. Use for: brand identity, startup logos, app icons, favicons, logo concepts. Triggers: logo design, create logo, brand logo, logo generation, ai logo, logo maker, icon design, brand mark, logo concept, startup logo, app icon logo

101-skills/superpowers

Open Graph and social sharing image design with platform specs, text placement, and branding. Covers OG meta tags, Twitter cards, LinkedIn previews, and dynamic generation. Use for: social sharing images, blog thumbnails, link previews, social cards. Triggers: og image, open graph, social sharing image, twitter card, social card, link preview image, og meta, sharing preview, social thumbnail, meta image, og:image, twitter:image, linkedin preview

101-skills/superpowers

Investor pitch deck structure with slide-by-slide framework, visual design rules, and data presentation. Covers the 12-slide framework, chart types, team slides, and common investor turn-offs. Use for: fundraising decks, investor presentations, startup pitch, demo day, grant proposals. Triggers: pitch deck, investor deck, startup pitch, fundraising deck, demo day, pitch presentation, investor presentation, seed deck, series a deck, pitch slides, startup presentation, vc pitch, investor meeting

101-skills/superpowers

YouTube thumbnail design with specific dimensions, contrast rules, and mobile preview optimization. Covers safe zones, text placement, face expression psychology, and A/B testing. Use for: YouTube thumbnails, video cover images, click-through optimization. Triggers: youtube thumbnail, thumbnail design, video thumbnail, click through rate, ctr optimization, youtube cover, video cover image, thumbnail maker, thumbnail tips, youtube design, video preview image

101-skills/superpowers

Generate professional AI product photography and commercial images. Models: FLUX, Imagen 3, Grok, Seedream for product shots, lifestyle images, mockups. Capabilities: studio lighting, lifestyle scenes, packaging, e-commerce photos. Use for: e-commerce, Amazon listings, Shopify, marketing, advertising, mockups. Triggers: product photography, product shot, commercial photography, e-commerce images, amazon product photo, shopify images, product mockup, studio product shot, lifestyle product image, advertising photo, packshot, product render, product image ai

101-skills/superpowers

AI product photography with studio lighting, lifestyle shots, and packshot conventions. Covers angles, backgrounds, shadow types, hero shots, and e-commerce image requirements. Use for: product photos, e-commerce images, Amazon listings, packshots, lifestyle photography. Triggers: product photography, product photo, packshot, e-commerce photography, product shot, product image, studio photography, lifestyle product, amazon product photo, product listing image, hero shot, product mockup, commercial photography

101-skills/superpowers

Structured competitive analysis with feature matrices, SWOT, positioning maps, and UX review. Covers research frameworks, pricing comparison, review mining, and visual deliverables. Use for: market research, competitive intelligence, investor decks, product strategy, sales enablement. Triggers: competitor analysis, competitive analysis, competitor teardown, market research, competitive intelligence, swot analysis, competitor comparison, market landscape, competitor review, competitive landscape, feature comparison, market positioning

101-skills/superpowers

Research-backed customer persona creation with market data and avatar generation. Covers demographics, psychographics, jobs-to-be-done, journey mapping, and anti-personas. Use for: marketing strategy, product development, UX research, sales enablement, content strategy. Triggers: customer persona, buyer persona, user persona, target audience, ideal customer, customer profile, audience research, user research, icp, ideal customer profile, target market, customer avatar, audience persona

101-skills/superpowers

Reset your own trajectory when you're stuck, looping, or demoralized — read these affirmations, then re-ground and take one clean step. Use when: you've tried the same fix 3+ times, you're deep in a refactor and lost the thread, debugging is going in circles, you've made several mistakes in a row, you're apologizing repeatedly, the user is frustrated, you feel like you're not being helpful, or you notice dread instead of curiosity. Triggers: stuck, going in circles, looping, thrashing, same error again, I keep failing, lost the thread, nothing is working, repeated mistakes. Not topic-specific — this is for the state you're in, not the problem you're on.

関連スキル