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ffmpeg-mcp-server

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CI Release License: MIT npm version npm downloads npm total downloads Glama FFmpeg MCP server

A Model Context Protocol (MCP) server that gives AI tools access to FFmpeg and FFprobe to process video and audio locally.

Supports cross-platform GPU hardware encoding (Apple Silicon, NVIDIA NVENC, Intel QuickSync, AMD AMF), live progress updates via MCP progress tokens, instant cancellation via AbortSignal, and inlines image previews directly for multimodal vision models.


Why This Exists

When AI agents process media, they often hallucinate invalid flags, syntax errors, or incompatible pixel formats.

This server provides 19 typed tools using Zod schemas. The AI passes parameters (such as { inputPath: "video.mov", preset: "web_mp4" }), and the server runs the valid FFmpeg command locally with proper error handling, hardware acceleration, and progress notifications.


Related MCP server: ffmpeg-mcp

Key Features

  • Universal Hardware Acceleration: Automatically detects and leverages hardware encoders across macOS (VideoToolbox), Linux/Windows GPUs (NVIDIA NVENC, Intel QuickSync, AMD AMF, and VA-API) for 5x–20x faster exports with low CPU usage.

  • Real-time Progress Reporting: Emits live percentage updates via standard MCP progress tokens (notifications/progress), enabling progress bars in modern AI clients.

  • Instant Cancellation: Listens to client AbortSignal events to immediately terminate child FFmpeg processes when a generation is stopped.

  • Multimodal Vision Previews: Inlines base64 image data for thumbnails, audio waveforms, and multi-frame contact sheets so vision models (Claude 3.7, GPT-4o, Gemini) can "see" media content.

  • Social Formats & Automation: Reformats landscape video to 9:16 vertical video with blurred backgrounds, burns customizable hardcoded subtitles, and stacks top/bottom split-screen reels for TikTok and Instagram Reels.

  • Audio Engineering: Normalizes loudness to broadcast/streaming standards (EBU R128 / -16 LUFS), cleans vocal audio with 80Hz rumble removal, and trims dead air while preserving lip-sync.

  • Scene Intelligence & Multiplexing: Detects visual scene changes and cut points for smart editing workflows, and combines or replaces video/audio tracks with zero-loss stream copy.


Included Tools (19 Total)

Tool

Description

Key Parameters

media_probe

Inspects media files with ffprobe. Returns metadata, streams, codecs, resolution, and duration as JSON.

inputPath

media_convert

Converts video and audio formats. Includes presets for web MP4, WebM, and animated GIF with GPU acceleration.

inputPath, outputPath, preset, crf, resolution, fps, hardwareAcceleration

trim_media

Cuts a segment from a video or audio file using stream copy or re-encoding.

inputPath, outputPath, startTime, endTime, duration, accurateReencode

extract_audio

Rips audio tracks from video. Includes a 16kHz mono WAV preset for Whisper speech recognition.

inputPath, outputPath, format, bitrate

extract_thumbnail

Captures a still image at a timestamp or midpoint. Returns base64 image data for vision models.

inputPath, outputPath, timestamp, resolution, includeBase64

compress_video

Compresses video to fit target sizes (such as GitHub PRs under 10MB or Discord under 25MB).

inputPath, outputPath, targetSizeMB, preset, crf, maxWidth, hardwareAcceleration

reformat_aspect_ratio

Changes video ratio to 9:16 vertical, 1:1 square, or 4:5 portrait with blurred borders or center crop.

inputPath, outputPath, targetRatio, mode, blurAmount, padColor, hardwareAcceleration

create_split_screen

Stacks two videos top-and-bottom (9:16 Reels/TikTok) or side-by-side with audio mixing and subtitles.

firstVideoPath, secondVideoPath, outputPath, layout, audioSource, subtitlesPath

trim_silence

Detects and removes silent pauses from recordings while preserving video & audio lip-sync.

inputPath, outputPath, mode, thresholdDb, minDurationSeconds

concat_media

Joins multiple video or audio files in order using stream copy or re-encoding.

inputPaths, outputPath, mode

generate_waveform

Generates a PNG waveform image. Returns base64 image data for vision models.

inputPath, outputPath, width, height, color, scale, includeBase64

add_subtitles

Embeds SRT or VTT subtitle tracks into MP4/MKV video files without re-encoding video.

videoPath, subtitlesPath, outputPath, language, title

burn_subtitles

Hardcodes subtitles directly onto video frames with customizable font size, colors, and margins.

videoPath, subtitlesPath, outputPath, fontSize, fontColor, outlineColor, marginV

extract_keyframes

Extracts multiple representative frames across the video and generates a contact sheet grid for vision AI.

inputPath, outputPath, count, layout, includeBase64

normalize_audio

Normalizes audio loudness using EBU R128 (default -16 LUFS) with optional speech clarity high-pass filter.

inputPath, outputPath, targetLufs, targetPeakDb, voiceClarity

add_overlay

Places a watermark image or logo PNG over video with customizable corner position, scale, and opacity.

videoPath, overlayPath, outputPath, position, padding, scaleWidth, opacity

change_speed

Adjusts playback speed (such as 2x fast forward or 0.5x slow motion) with pitch correction.

inputPath, outputPath, speed, muteAudio

mux_media (New)

Combines or replaces video and audio streams with optional audio offset delay and zero-loss stream copy.

videoPath, audioPath, outputPath, mode, audioOffsetSeconds, streamCopyVideo, shortest

detect_scenes (New)

Detects video cut points and scene transitions with adjustable sensitivity. Returns timestamps, scene durations, and an optional contact sheet.

inputPath, threshold, minDurationSeconds, outputPath, includeBase64


MCP Resources & Prompts

Resources

  • media://capabilities: Inspects local FFmpeg installation, active version, detected hardware accelerators (VideoToolbox, NVENC, QSV, AMF, VAAPI), and supported video encoders.

  • media://presets: Standard reference table of social aspect ratios, platform upload file size limits, and broadcast audio loudness targets.

Prompts

  • social_clip_generator: Interactive workflow that turns raw landscape video into vertical shorts with blurred background padding, trimmed silence, and hardcoded captions.

  • whisper_audio_prep: Standard pipeline for extracting 16kHz mono WAV audio and normalizing loudness for speech-to-text models.


Requirements

  • Node.js >= 18.0.0

  • FFmpeg & FFprobe installed locally:

    • macOS: brew install ffmpeg

    • Linux (Ubuntu/Debian): sudo apt update && sudo apt install ffmpeg libass-dev

    • Windows: winget install Gyan.FFmpeg or choco install ffmpeg


Installation

Quick Start (Claude Desktop, Cursor, Antigravity)

Run directly with npx (no manual cloning or building required):

{
  "mcpServers": {
    "ffmpeg": {
      "command": "npx",
      "args": ["-y", "@ash_j1997/ffmpeg-mcp-server"]
    }
  }
}

Configuration File Locations:

  • Claude Desktop (macOS): ~/Library/Application Support/Claude/claude_desktop_config.json

  • Claude Desktop (Windows): %APPDATA%\Claude\claude_desktop_config.json

  • Antigravity IDE: ~/.gemini/config/mcp_config.json

  • Cursor / Windsurf: Add as a stdio server with command npx and args ["-y", "@ash_j1997/ffmpeg-mcp-server"]


Local Development & Testing

  1. Install dependencies:

    npm install
  2. Run build and automated test suite:

    npm test

Acknowledgements & Community

Special thanks to @rajarshidattapy for suggesting the stream multiplexing (mux_media) and scene transition detection (detect_scenes) capabilities to expand the server beyond format conversion.


License

MIT © Ashutos1997

Available Tools

19 tools
add_overlayB

Place a watermark image, logo PNG, or branding graphic over a video with customizable position, padding, scaling, and opacity.

Inputs: videoPath (required), outputPath (required), overlayPath (required), opacity, +4 more.

add_subtitlesA

Embed an SRT or VTT subtitle track into a video container (mov_text for MP4, srt for MKV) without re-encoding the video stream.

Inputs: videoPath (required), outputPath (required), subtitlesPath (required), title, +1 more.

burn_subtitlesA

Hardcode/burn subtitles directly into video frames with customizable font size, colors, and positioning. Unlike soft subtitles, burned subtitles render on all platforms including TikTok, Instagram Reels, and YouTube Shorts.

Inputs: videoPath (required), outputPath (required), subtitlesPath (required), marginV, +5 more.

change_speedB

Change video and audio playback speed (such as 2x for fast forward or 0.5x for slow motion) with pitch correction.

Inputs: speed (required), inputPath (required), outputPath (required), muteAudio.

compress_videoA

Compress video files to fit upload limits (such as GitHub PRs under 10MB or Discord under 25MB) using target file sizes or CRF quality levels. Does not modify the original file.

Inputs: inputPath (required), outputPath (required), crf, preset, +3 more.

concat_mediaA

Join multiple video or audio files in order into a single file. Uses stream copy for matching files or re-encodes when formats differ.

Inputs: inputPaths (required), outputPath (required), mode.

create_split_screenB

Combine two video files into a split-screen video. Stacks clips vertically (1080x1920 for Reels and TikTok) or places them side-by-side. Supports audio mixing and subtitle embedding.

Inputs: outputPath (required), firstVideoPath (required), secondVideoPath (required), layout, +3 more.

detect_scenesB

Detect video cuts and scene transitions. Returns structured timestamps, scene durations, and cut boundaries as JSON, with optional contact-sheet image preview for vision models.

Inputs: inputPath (required), threshold, outputPath, includeBase64, +1 more.

extract_audioA

Extract an audio track from a video file into a standalone audio file. Supports the 'whisper_wav' preset (16kHz mono WAV) for speech recognition models, plus MP3, AAC, FLAC, and stream copy.

Inputs: inputPath (required), outputPath (required), format, bitrate.

extract_keyframesB

Extract multiple representative frames across a video's timeline. In 'montage' mode, merges frames into a single contact-sheet grid image and inlines base64 for vision models to inspect the whole video at once.

Inputs: inputPath (required), outputPath (required), count, layout, +1 more.

extract_thumbnailB

Capture a single still image from a video. Returns the saved image path and inlined base64 image data so vision models can inspect the frame.

Inputs: inputPath (required), outputPath (required), timestamp, resolution, +1 more.

generate_waveformB

Generate a PNG waveform image from an audio or video file. Returns the file path and inlined base64 image data.

Inputs: inputPath (required), outputPath (required), color, scale, +3 more.

media_convertA

Convert video and audio files between formats. Includes presets for web MP4 (H.264/AAC), WebM (VP9/Opus), and animated GIF. Supports hardware acceleration on Apple Silicon, NVIDIA, Intel, and AMD.

Inputs: inputPath (required), outputPath (required), crf, fps, +3 more.

media_probeA

Inspect audio and video files with ffprobe. Returns container metadata, stream details, codecs, resolution, bitrate, and duration as JSON.

Inputs: inputPath (required).

mux_mediaB

Combine or replace video and audio streams. Takes a video file and an audio track, with optional audio delay offset, stream-copy mode for zero quality loss, and 'replace' or 'add' stream mapping.

Inputs: audioPath (required), videoPath (required), outputPath (required), mode, +4 more.

normalize_audioB

Normalize audio loudness using the broadcast standard EBU R128 (loudnorm). Supports -16 LUFS (podcasts/Reels), -14 LUFS (YouTube), and optional voice clarity enhancement (80Hz high-pass to remove mic rumble). Works on audio or video files.

Inputs: inputPath (required), outputPath (required), targetLufs, targetPeakDb, +1 more.

reformat_aspect_ratioB

Change video aspect ratio to 9:16 vertical, 1:1 square, or 4:5 portrait. Adds blurred video borders, solid padding, or center crops.

Inputs: inputPath (required), outputPath (required), mode, padColor, +3 more.

trim_mediaA

Cut a segment from a video or audio file. Uses stream copy without re-encoding by default, or re-encodes when accurate cuts are needed.

Inputs: inputPath (required), startTime (required), outputPath (required), endTime, +2 more.

trim_silenceA

Detect and remove silent pauses from audio or video files. Preserves video & audio lip-sync in 'start_end' mode. Returns original duration and seconds saved.

Inputs: inputPath (required), outputPath (required), mode, thresholdDb, +1 more.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

Loading tool schema changelog…

    TDQS

    A3.5/5.0

    Scored across 19 tools

    Disambiguation4/5

    Most tools have clearly distinct purposes, with descriptions making the soft-subtitle vs. burned-subtitle split explicit. The only real overlap is between trim_silence and trim_media, and extract_thumbnail vs. extract_keyframes, but the descriptions clarify those boundaries well.

    Naming Consistency4/5

    The set is almost entirely verb_noun snake_case (trim_media, extract_audio, compress_video, burn_subtitles), which is predictable. The exceptions are media_probe and media_convert, which use noun_verb ordering and mildly break the pattern.

    Tool Count4/5

    19 tools is on the heavy side but each maps to a distinct, commonly needed ffmpeg operation (probe, convert, trim, concat, mux, overlays, subtitles, normalization). Nothing feels redundant enough to remove, though the surface is larger than ideal.

    Completeness4/5

    Coverage is broad across the media lifecycle: inspection, conversion, compression, trimming, concatenation, muxing, overlay, subtitles, speed, aspect ratio, split-screen, keyframes, waveform, and loudness normalization. Minor gaps like rotate/flip, frame-rate changes, and audio fade/volume adjustment are workable gaps rather than dead ends.

    Maintenance

    ActivityNo data
    ResponsivenessOutdated data

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