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Compress macOS screen recordings with zero CPU stress using Apple Silicon's hardware HEVC encoder. Typically reduces file size 70-90% while staying visually lossless. Computer stays silent during encoding.
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| name | quietshrink |
| description | Compress macOS screen recordings with zero CPU stress using Apple Silicon's hardware HEVC encoder. Typically reduces file size 70-90% while staying visually lossless. Computer stays silent during encoding. |
You have access to cli-anything-quietshrink, a CLI for compressing video files on macOS Apple Silicon. It uses the Media Engine (hardware HEVC encoder), not the CPU, so encoding is fast and silent.
Don't use this on non-screen content (camera footage, vlogs) — savings will be much smaller because there are no duplicate frames to drop.
# Compress with default transparent quality
cli-anything-quietshrink compress <input> [output]
# Compress with specific preset
cli-anything-quietshrink compress -q tiny <input> # smallest
cli-anything-quietshrink compress -q transparent <input> # default, visually lossless
cli-anything-quietshrink compress -q pristine <input> # near-source quality
# Inspect a file before compressing
cli-anything-quietshrink probe <input>
# List quality presets
cli-anything-quietshrink presets
# Verify environment
cli-anything-quietshrink doctor
All commands accept --json for machine-readable output.
| Preset | q | Typical reduction | SSIM | Use case |
|---|---|---|---|---|
tiny | 50 | ~90% | ~0.95 | Chat/email — small artifacts OK |
balanced | 55 | ~88% | ~0.99 | Docs/sharing — high quality |
transparent (default) | 60 | ~87% | ~0.99+ | Anything important — visually lossless |
pristine | 70 | ~84% | ~0.997 | Archival — near-source |
compress returns:
{
"input": "/path/to/input.mov",
"output": "/path/to/output.mov",
"input_size": 105952129,
"output_size": 12345678,
"saved_bytes": 93606451,
"saved_percent": 88.3,
"duration_seconds": 193.3,
"elapsed_seconds": 87,
"encoding_speed": "2.2x",
"quality_preset": "transparent",
"q_value": 60,
"gop": 600
}
probe returns:
{
"path": "...",
"size_bytes": 105952129,
"size_mb": 101.04,
"codec": "h264",
"width": 3024,
"height": 1964,
"framerate": "120/1",
"duration_seconds": 193.31
}
User wants to share a recording
├─ Is it on Apple Silicon Mac? → use quietshrink
│ ├─ For chat/email/quick share → -q tiny
│ ├─ For docs/important sharing → -q transparent (default)
│ └─ For archival/editing → -q pristine
└─ Not on Mac? → falls back to software, less efficient
Before processing, run doctor to verify environment.
For unfamiliar files, run probe to understand resolution/codec/duration.
ffmpeg not found → brew install ffmpeghevc_videotoolbox not available → brew reinstall ffmpegcompression_failed → check input file isn't corrupted; try --verbose mode to see ffmpeg errorsquietshrink command (via the install script)