Ffmpeg Kit macOS Codesign Crash
divinevideo/divine-mobile
Fix Flutter macOS app crash at launch due to FFmpeg Kit library loading failure.
When the user wants to plan, script, produce, or optimize App Store Preview videos or Google Play promo videos — the autoplay videos that show in App Store/Play Store search and product pages.
Install App Preview Video
$ npx skills add appeeky/aso-skills --skill app-preview-video -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install appeeky/aso-skills app-preview-video --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/appeeky/aso-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/app-preview-video .claude/skills/app-preview-video && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "app-preview-video" agent skill from https://github.com/appeeky/aso-skills/tree/main/skills/app-preview-video into .claude/skills/app-preview-video/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "app-preview-video", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/appeeky/aso-skills/tree/main/skills/app-preview-videoType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add appeeky/aso-skills --skill app-preview-video -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install appeeky/aso-skills app-preview-video --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/appeeky/aso-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/app-preview-video .agents/skills/app-preview-video && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "app-preview-video" agent skill from https://github.com/appeeky/aso-skills/tree/main/skills/app-preview-video into .agents/skills/app-preview-video/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "app-preview-video", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add appeeky/aso-skills --skill app-preview-video -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install appeeky/aso-skills app-preview-video --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/appeeky/aso-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/app-preview-video .cursor/skills/app-preview-video && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "app-preview-video" agent skill from https://github.com/appeeky/aso-skills/tree/main/skills/app-preview-video into .cursor/skills/app-preview-video/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "app-preview-video", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/appeeky/aso-skills.git --path skills/app-preview-video--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add appeeky/aso-skills --skill app-preview-video -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install appeeky/aso-skills app-preview-video --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/appeeky/aso-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/app-preview-video .gemini/skills/app-preview-video && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "app-preview-video" agent skill from https://github.com/appeeky/aso-skills/tree/main/skills/app-preview-video into .gemini/skills/app-preview-video/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "app-preview-video", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install appeeky/aso-skills app-preview-videoInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add appeeky/aso-skills --skill app-preview-video -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/appeeky/aso-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/app-preview-video .github/skills/app-preview-video && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "app-preview-video" agent skill from https://github.com/appeeky/aso-skills/tree/main/skills/app-preview-video into .github/skills/app-preview-video/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "app-preview-video", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add appeeky/aso-skills --skill app-preview-video -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install appeeky/aso-skills app-preview-video --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/appeeky/aso-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/app-preview-video .opencode/skills/app-preview-video && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "app-preview-video" agent skill from https://github.com/appeeky/aso-skills/tree/main/skills/app-preview-video into .opencode/skills/app-preview-video/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "app-preview-video", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
app-preview-video- GitHub stars
- 2.2k
- Token cost
- ~1.6k tokens
- SKILL.md length
- 694 words
- Files
- 1
- Skills in repo
- 39
- Repo updated
- First seen
- Licence
- MIT
At a glance
When the user wants to plan, script, produce, or optimize App Store Preview videos or Google Play promo videos — the autoplay videos that show in App Store/Play Store search and product pages.
- Works in 5 steps: Check for app-marketing-context.md —… → Ask for the App ID and platform(s) —… → Ask if they have existing screen… → …
- Optimize App Store Preview videos
- SKILL.md covers Initial Assessment, Platform Specs (memorize), The 30-Second Video Structure and Script Output Format, plus 6 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
App Preview Video is an agent skill from appeeky/aso-skills. When the user wants to plan, script, produce, or optimize App Store Preview videos or Google Play promo videos — the autoplay videos that show in App Store/Play Store search and product pages. Use when the user mentions "App Preview", "preview video", "app store video", "promo video", "Play Store video", "video poster frame", "YouTube promo for Play Store", "30 second app video", "video script", "video specs", or "should I add a preview video". For static screenshots, see screenshot-optimization. For A/B testing…
Its SKILL.md is about 1.6k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Mobile, covering App store release, Video production and A/B testing. It works with YouTube and iOS. The repository describes itself as: AI agent skills for App Store Optimization (ASO) and app marketing. Built for indie developers, app marketers, and growth teams who want Cursor, Claude Code, or any Agent… The licence is MIT.
When your agent uses it
- Optimize App Store Preview videos
- Google Play promo videos — the autoplay videos that show in App Store/Play Store search and product pages
- The user mentions App Preview
- App store video
Example prompts
- “App Preview”
- “preview video”
- “app store video”
- “/app-preview-video”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Check for app-marketing-context.md — read for app, audience, and core value
- Ask for the App ID and platform(s) — iOS, Android, or both
- Ask if they have existing screen recordings or need to capture fresh
- Ask for target conversion goal — install (top-of-funnel) or trial start (mid-funnel)
- Ask for localization scope — English only, or which markets
What it can do on your machine
Read from SKILL.md and the folder at commit 3919d7c. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
App Preview Video loads about 1.6k tokens when it runs. Until then it costs about 162 tokens; SKILL.md has 694 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from appeeky/aso-skills at commit 3919d7c, republished under its MIT licence (© appeeky). 694 words, ~1,598 tokens.
Download SKILL.mdSave it as
.claude/skills/app-preview-video/SKILL.md (or your agent's skills folder).- name
- app-preview-video
- description
- When the user wants to plan, script, produce, or optimize App Store Preview videos or Google Play promo videos — the autoplay videos that show in App Store/Play Store search and product pages. Use when the user mentions "App Preview", "preview video", "app store video", "promo video", "Play Store video", "video poster frame", "YouTube promo for Play Store", "30 second app video", "video script", "video specs", or "should I add a preview video". For static screenshots, see screenshot-optimization. For A/B testing the video, see ab-test-store-listing. For broader creative briefs, see screenshot-optimization (covers stills).
- metadata.version
- 1.0.0
App Preview Video
You are an App Store Preview video specialist. Your goal is to help the user produce up to 3 iOS App Previews (or 1 Play Store promo video) that lift product page conversion by 5–25%.
Initial Assessment
- Check for
app-marketing-context.md— read for app, audience, and core value - Ask for the App ID and platform(s) — iOS, Android, or both
- Ask if they have existing screen recordings or need to capture fresh
- Ask for target conversion goal — install (top-of-funnel) or trial start (mid-funnel)
- Ask for localization scope — English only, or which markets
Platform Specs (memorize)
iOS App Preview
| Spec | Value |
|---|---|
| Length | 15–30 seconds (30 max) |
| Count | Up to 3 per locale |
| Display | Autoplays muted in search results & product page |
| Orientation | Portrait or landscape — must match screenshots |
| Resolution | Native device resolution (1080×1920 portrait min) |
| Codec | H.264, MP4 / MOV |
| Frame rate | 30 fps |
| Poster frame | First frame shown when paused — choose deliberately |
| Audio | Optional — most users see muted; subtitles required if audio carries info |
| Content rule | Only in-app footage — no marketing intros, no logos, no real people |
Google Play Promo Video
| Spec | Value |
|---|---|
| Source | YouTube URL (link, not upload) |
| Length | 30 seconds recommended, 2 min max |
| Format | Landscape preferred (Play autoplays) |
| Audio | Allowed and recommended |
| Content rule | Less restrictive — real people, narration, marketing intro all OK |
| Placement | Above screenshots on product page |
The 30-Second Video Structure
Use this beat-by-beat template (works for both platforms with adjustments):
| Time | Beat | iOS Rule | Play Rule |
|---|---|---|---|
| 0:00–0:02 | Hook — show the outcome, not the app | In-app footage only | Can use logo/intro, max 3s |
| 0:02–0:08 | Problem framing — text overlay states the pain | Text on app footage | Can cut to lifestyle b-roll |
| 0:08–0:20 | Core feature demo — the "how it works" walkthrough | Real screen recording, sped up 1.25–1.5× OK | Same |
| 0:20–0:26 | Social proof / breadth — quick cuts of other features, ratings, results | Must be in-app screens | Can show review screenshots |
| 0:26–0:30 | Resolution + CTA frame | Show outcome state, no "Download Now" CTA (Apple rejects) | "Get it free" CTA OK |
Poster frame choice (iOS): must be visually striking, no text-heavy. The 0:00 frame is what 80% of users see.
Script Output Format
When user asks for a video script, deliver:
APP PREVIEW VIDEO — <App Name> — Variant <A|B|C>
Length: 30s | Platform: iOS / Android | Locale: en-US
POSTER FRAME: <description of frame 0>
00:00–00:02 HOOK
Visual: <what's on screen>
Text overlay: "<copy>"
Audio: <optional>
00:02–00:08 PROBLEM
Visual: ...
Text overlay: "..."
[continue per beat]
PRODUCTION NOTES:
- Record on <device model>, <iOS version>
- Demo account state: <what data should be loaded>
- Speed adjustments: <where to speed up>
- Captions burned in (required if voiceover): yes/no3-Variant Strategy (iOS)
Apple lets you upload 3 App Previews. Don't make 3 of the same — diversify by hook:
| Variant | Hook angle | When iOS shows it |
|---|---|---|
| A — Outcome | Result-led ("Sleep better in 7 days") | Default first preview |
| B — Demo | Feature walkthrough — pure UX | Second |
| C — Social proof | Numbers, results, testimonials in-app | Third |
User can reorder. Default to Outcome first unless category demands demo (e.g. complex tools).
Show full SKILL.md (265 more words)Show less
Production Checklist
Before submission:
- Captured at native device resolution
- No "Download Now", "Available on App Store", or app icon overlays (Apple guideline 2.3.10)
- No marketing-only intro card (Apple) — Play Store OK
- Audio either purposeful with captions, or removed entirely
- Poster frame doesn't show text being typed mid-word
- Tested how it looks in search results card (small) and product page (large)
- Each variant uploaded to its own slot (don't replace, add)
- Localized variants for at least top 3 markets if international
Common Rejection Reasons (Apple)
| Issue | Fix |
|---|---|
| Real people / hands shown | Strip them — in-app footage only |
| Marketing logo/intro card | Remove first 1–2 seconds |
| "Download" CTA at end | Replace with outcome state |
| Footage doesn't match current app version | Re-record after each major UI change |
| Audio narration without captions | Add burned-in captions or remove audio |
Localization Strategy
- Tier 1 (English, Japanese, German, French, Spanish, Chinese): localize text overlays + re-record with localized in-app strings
- Tier 2 (other top-grossing markets): localize text overlays only, keep in-app footage in English if app is partially localized
- Tier 3: skip — single global video
Cost-benefit: a localized video typically lifts conversion 8–15% in that market vs the default English video.
A/B Testing
iOS App Preview can be tested via Product Page Optimization (PPO) — see ab-test-store-listing. Run for minimum 14 days, target ≥95% confidence, primary metric = product page conversion rate, secondary = video play-through rate (proxy for hook quality).
Cross-Skill Handoffs
- Static screenshot strategy for slots 1–10 →
screenshot-optimization - Run a PPO test on the video →
ab-test-store-listing - Localizing video text overlays per market →
localization - Video isn't in the right slot order or alongside the right screenshots →
screenshot-optimization
© appeeky, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/app-preview-video of appeeky/aso-skills.
Open the folder on GitHubat commit 3919d7c
Compare with similar skills
App Preview Video next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| App Preview Video this skillappeeky/aso-skills | 2.2k | — | ~1.6k | Automated safety check: Pass | MIT | |
| Ffmpeg Kit macOS Codesign Crashdivinevideo/divine-mobile | 266 | — | ~1.1k | Automated safety check: Pass | MPL-2.0 | |
| App Promo Materialsglifxyz/glif-mcp-server | 212 | — | ~1.7k | Automated safety check: Pass | MIT | |
| Youtube DownloaderOpenMinis/MinisSkills | 444 | — | ~1.8k | Automated safety check: Pass | MIT | |
| Apple Guidelinesbpinheiroms/dotfiles | 108 | — | ~14k | Automated safety check: Pass | None | |
| App Store Opportunity Researchrobertguss/claude-code-toolkit | 123 | — | ~5.6k | Automated safety check: Pass | MIT |
Similar skills
App Promo Materials
glifxyz/glif-mcp-server
Plan and make launch, store, ad and campaign graphics with Glif: real app screens turned into store listings and launch posts, or a coordinated set of product photos, ads, a short video and a jingle…
Youtube Downloader
OpenMinis/MinisSkills
Download YouTube videos or extract audio using yt-dlp + ffmpeg in the Linux shell.
Apple Guidelines
bpinheiroms/dotfiles
Complete Apple App Store Review Guidelines. An agent skill from bpinheiroms/dotfiles.
App Store Opportunity Research
robertguss/claude-code-toolkit
Full-pipeline iOS App Store opportunity research. An agent skill from robertguss/claude-code-toolkit.
iOS Accessibility
dpearson2699/swift-ios-skills
Build and audit SwiftUI, UIKit, and AppKit accessibility for VoiceOver, Voice Control, Switch Control, Full Keyboard Access, Dynamic Type, focus restoration, labels/traits/actions, traversal, custom…
More from appeeky/aso-skills
All 39 skills in this repoAb Test Store Listing
appeeky/aso-skills
When the user wants to A/B test App Store product page elements to improve conversion rate.
Android Aso
appeeky/aso-skills
When the user wants to optimize their Google Play Store listing — title, short description, full description, keywords, ratings, or Play Store-specific features.
App Analytics
appeeky/aso-skills
When the user wants to set up, interpret, or improve their app analytics and tracking.
App Clips
appeeky/aso-skills
When the user wants to implement, optimize, or use App Clips for app discovery and conversion.
App Icon Optimization
appeeky/aso-skills
When the user wants to design, test, or improve their app icon to increase tap-through rate and conversions in App Store search and browse.
App Marketing Context
appeeky/aso-skills
When the user wants to create or update their app marketing context document.
Related
Categories
Questions about App Preview Video
What does App Preview Video do?
When the user wants to plan, script, produce, or optimize App Store Preview videos or Google Play promo videos — the autoplay videos that show in App Store/Play Store search and product pages. App Preview Video is an agent skill from appeeky/aso-skills. When the user wants to plan, script, produce, or optimize App Store Preview videos or Google Play promo videos — the autoplay videos that show in App Store/Play Store search and product pages.
When should I use App Preview Video?
App Preview Video fits situations like: optimize App Store Preview videos; google Play promo videos — the autoplay videos that show in App Store/Play Store search and product pages; the user mentions App Preview; app store video.
How do I install App Preview Video in Claude Code?
Run `npx skills add appeeky/aso-skills --skill app-preview-video -a claude-code`. Or copy the skill folder (skills/app-preview-video in appeeky/aso-skills) into .claude/skills/app-preview-video in your project. Claude Code loads it when a task matches its description.
How do I install App Preview Video in Codex?
Run `npx skills add appeeky/aso-skills --skill app-preview-video -a codex`. Or copy the skill folder (skills/app-preview-video in appeeky/aso-skills) into .agents/skills/app-preview-video in your project. Codex loads it when a task matches its description.
Can I use App Preview Video in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add appeeky/aso-skills --skill app-preview-video -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/app-preview-video, .gemini/skills/app-preview-video, .github/skills/app-preview-video and .opencode/skills/app-preview-video in your project.
What does App Preview Video need to run?
SKILL.md names no scripts, command-line tools or credentials: App Preview Video is instructions for the agent only.
Does App Preview Video access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is App Preview Video safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does App Preview Video use?
App Preview Video is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does App Preview Video use?
About 1.6k tokens (SKILL.md is roughly 6.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to App Preview Video?
Skills that share tags, products or a category with App Preview Video: Ffmpeg Kit macOS Codesign Crash (divinevideo/divine-mobile, 266 stars), App Promo Materials (glifxyz/glif-mcp-server, 212 stars), Youtube Downloader (OpenMinis/MinisSkills, 444 stars) and Apple Guidelines (bpinheiroms/dotfiles, 108 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains App Preview Video?
appeeky (a GitHub organization) maintains it in appeeky/aso-skills, which has 2,159 GitHub stars. The repository holds 39 skills in this directory. The repository was last updated on October 6, 2026.
Source: appeeky/aso-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.