clipwright-silence
MCP tool for silence detection and OTIO timeline generation. Detects silent intervals in a media file and writes a KEEP-interval timeline (.otio) that clipwright-render can use for automated cut editing.
Overview
- Input: Media file (video or audio), output OTIO path, optional detection parameters
- Process: Runs the ffmpeg
silencedetectfilter (default) or Silero VAD (opt-in) to find silence intervals, inverts them to KEEP intervals, applies padding and merging, and writes an OTIO timeline - Output: New OTIO file with KEEP intervals; input media is never modified (non-destructive, readOnly)
MCP Tool
clipwright_detect_silence
Parameters
| Name | Type | Default | Description |
|---|---|---|---|
media |
string |
required | Input media file path (video or audio) |
output |
string |
required | Output OTIO timeline file path (.otio extension) |
options |
object |
null |
DetectSilenceOptions (see below) |
DetectSilenceOptions
| Field | Type | Default | Description |
|---|---|---|---|
silence_threshold_db |
float |
-30.0 |
Volume threshold (dB) for silence detection (silencedetect backend only; must be ≤ 0) |
min_silence_duration |
float |
0.5 |
Minimum duration (seconds) to classify as silence (silencedetect backend only; must be > 0) |
padding |
float |
0.1 |
Padding (seconds) added to both sides of each KEEP interval. Overlapping intervals are merged |
min_keep_duration |
float |
0.0 |
KEEP intervals shorter than this value (seconds) are discarded after padding and merging |
backend |
string |
"silencedetect" |
Detection backend: "silencedetect" (ffmpeg) or "vad" (Silero VAD / ONNX) |
vad_threshold |
float |
0.5 |
VAD backend only. Speech probability threshold (0.0–1.0); values ≥ this are speech |
vad_min_speech_duration |
float |
0.25 |
VAD backend only. Minimum speech segment duration (seconds) |
vad_min_silence_duration |
float |
0.1 |
VAD backend only. Minimum silence gap (seconds) between speech intervals |
Dependencies
| Package | Purpose |
|---|---|
clipwright |
Shared types, envelope, errors, subprocess runner |
mcp[cli] |
MCP server |
pydantic |
Parameter validation |
onnxruntime |
Silero VAD inference (VAD backend) |
Installation and Startup
uv add clipwright-silence
clipwright-silence
Or within a uv workspace:
uv run --package clipwright-silence clipwright-silence
Prerequisites
- Python 3.11 or later
- ffmpeg and ffprobe available on PATH, or set via environment variables:
CLIPWRIGHT_FFMPEG— path to the ffmpeg binaryCLIPWRIGHT_FFPROBE— path to the ffprobe binary
- For the
vadbackend:onnxruntimeis bundled as a dependency; no additional binary is required
1 maintainer
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