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quietshrink

Compress macOS screen recordings to smaller .mov/.mp4 files using hardware HEVC encoding.

Updated May 7, 2026
Search Tags:#cli#macos#apple silicon#json output#video compression#hevc#screen recordings
One-click install
npx skills add https://github.com/dawsonblock/JUDGE_ATLAS --skill quietshrink-dawsonblock
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: quietshrink
Source: https://github.com/dawsonblock/JUDGE_ATLAS/tree/main/external/CLI-Anything-main/quietshrink/agent-harness/cli_anything/quietshrink/skills
Command: npx skills add https://github.com/dawsonblock/JUDGE_ATLAS --skill quietshrink-dawsonblock

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Compressing screen recordings usually stresses your CPU and still risks visible quality loss or large upload sizes.

Core Features & Use Cases

  • Hardware-accelerated HEVC compression on Apple Silicon: Uses Media Engine/HEVC hardware encoding to reduce file size quickly while keeping the computer quiet.
  • Preset-based quality control for different sharing needs: Choose tiny for maximum reduction, transparent (default) for visually lossless sharing, or pristine for near-source archival quality.
  • Probe and environment verification: Inspect codec/resolution/duration before compressing and run a doctor check to confirm the encoder environment.

Quick Start

Use quietshrink to compress an attached screen recording for sharing by running: cli-anything-quietshrink compress -q transparent input.mov output.mov.

Frequently Asked Questions about quietshrink

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I compress macOS screen recordings to smaller file sizes for sharing?▼

Compress macOS screen recordings by applying hardware-accelerated HEVC encoding on Apple Silicon, which significantly reduces .mov or .mp4 file sizes while preserving near-lossless visual quality for chat, email, or documentation sharing.

Can I use hardware HEVC encoding to compress video without stressing my CPU?▼

Yes, hardware HEVC encoding uses the Apple Silicon Media Engine to compress video quickly and quietly, keeping CPU usage low while achieving significant file size reduction for your screen recordings.

What quality presets are available for HEVC video compression on Apple Silicon?▼

Available HEVC video compression presets include tiny for maximum file size reduction, transparent as the default for visually lossless sharing, and pristine for near-source archival quality preservation.

How do I inspect a screen recording's codec and resolution before compressing?▼

Inspect a screen recording's codec, resolution, and duration before compressing by running a probe check, which also supports emitting machine-readable JSON output for automated environment verification.

Does quietshrink work on Intel Macs or require specific hardware for HEVC compression?▼

HEVC video compression requires Apple Silicon hardware and the Media Engine for encoding. You can run a doctor check to verify your encoder environment and confirm hardware compatibility before compressing screen recordings.

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