Our review

Splits audio or video files into audio segments of specified duration, with intelligent cut points based on silence detection via FFmpeg.

Strengths

Automatic silence detection for clean cuts
Batch processing support for multiple files
Adjustable parameters for different audio types
Compatibility with many video and audio formats

Limitations

Requires FFmpeg to be installed on the system
Silence detection quality depends on configured threshold and window
No resume capability if batch processing is interrupted

When to use it

For segmenting long recordings, podcasts, lectures, or videos into fixed-duration chunks with natural cut points at silences.

When not to use it

If you need content-aware segmentation (e.g., by topic or speaker change) without relying on duration.

Examples

Split a podcast into 30-minute segments

Split the podcast.mp3 file into 30-minute audio segments using silence detection with default settings.

Batch process lectures into 45-minute chunks

Batch segment all video files in the ./lectures directory into 45-minute audio chunks using FFmpeg with standard silence parameters.

Custom noise threshold for noisy recording

Split the noisy_recording.mkv into 15-minute segments with a silence threshold of -35dB and a window of 15 seconds to avoid cutting during short pauses.

name: audio-spliter description: "Split media files (video/audio) into audio segments by duration with silence-aware cut points using FFmpeg. Use when users need to segment long recordings, podcasts, lectures, or videos into chunks. Supports batch processing and any FFmpeg-compatible format." allowed-tools: [Bash(ffmpeg, ffprobe, bc, grep, sed, find)]

Audio Splitter

Segment media files into audio chunks with intelligent silence detection for clean cut points.

Quick Start

# Single file (video or audio)
./scripts/segment_audio.sh video.mp4 1800

# Batch processing
./scripts/batch_segment.sh -d ./videos 1800

Scripts

| Script | Purpose | |--------|---------| | segment_audio.sh | Segment single file (video or audio) | | batch_segment.sh | Batch wrapper for multiple files |

segment_audio.sh

Segment a single media file into audio chunks.

./scripts/segment_audio.sh [OPTIONS] <input_file> <segment_seconds>

| Option | Default | Description | |--------|---------|-------------| | -w, --window | 10 | Search window ±N seconds | | -n, --noise | -60dB | Silence threshold (dBFS) | | -s, --silence | 2 | Min silence duration (seconds) | | -o, --output-dir | input dir | Output directory |

Examples:

./scripts/segment_audio.sh video.mp4 1800              # 30-min segments
./scripts/segment_audio.sh podcast.mp3 1800
./scripts/segment_audio.sh -w 15 -n "-35dB" lecture.mkv 2700

batch_segment.sh (Batch)

Batch process multiple files in a directory.

./scripts/batch_segment.sh -d [OPTIONS] <input_dir> <segment_seconds>

| Option | Default | Description | |--------|---------|-------------| | -d, --dir | - | Enable batch mode | | --depth | 3 | Directory traversal depth | | -w, --window | 10 | Search window ±N seconds | | -n, --noise | -60dB | Silence threshold | | -s, --silence | 2 | Min silence duration | | -o, --output-dir | input dir | Output directory |

Examples:

./scripts/batch_segment.sh -d ./lectures 1800
./scripts/batch_segment.sh -d ./podcasts --depth 5 3600
./scripts/batch_segment.sh -d ./videos -o ./output 1800

Output Format

{source_name}_{num}_[{start}-{end}].{ext}

Example: video.mp4 → video_01_[0-1800].aac, video_02_[1800-3595].aac

Supported Formats

Video: mp4, mkv, avi, mov, webm, flv, wmv, m4v
Audio: mp3, aac, flac, wav, ogg, opus, m4a, wma

Detection Settings

| Audio Type | Noise | Window | Silence | |------------|-------|--------|---------| | Quiet studio | -50dB | 5s | 0.5s | | Default | -60dB | 10s | 2s | | Noisy recording | -35dB | 15s | 1.5s |

Dependencies

FFmpeg with ffprobe (brew install ffmpeg)

Audio Splitter with Silence Detection

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