Media Converter.GPU-accelerated batch converter for your NAS.

Video and audio conversion with automatic GPU detection (NVIDIA NVENC, Intel QSV/VAAPI, AMD AMF) and CPU fallback. Browse from root — every NAS volume directly reachable. Currently free.

FreeGPU-acceleratedNVENC/QSV/VAAPI/AMFBatch conversionWatch folderDockerSelf-hosted

What Media Converter can do

🎬

All common formats

Video: H.264, H.265, AV1, VP9, MPEG-4. Audio: MP3, AAC, FLAC, Opus, WAV, AC3, Vorbis.

⚡

GPU acceleration

NVIDIA NVENC, Intel Quick Sync (QSV) & VAAPI, AMD AMF — with automatic CPU fallback on errors.

📁

Root filesystem access

Browse from root, every NAS volume is directly reachable — no need to copy files separately.

👁

Watch folder

Monitor a folder, auto-convert new files, optionally auto-delete after success.

🔐

NAS user authentication

🐳

Docker-based

Self-hosted, no subscription, runs on a NAS, server or Raspberry Pi.

Ready in 2 steps

Extract & start

unzip medienconverter_release.zip -d media-converter && cd media-converter && docker compose up -d --build

Open in browser

http://SERVER-IP:8686 — log in with your NAS/server system user credentials.

The right profile for every hardware

Single file

Drag & drop a file, choose a target profile (MP4 H.264/H.265, WebM VP9, MP3 …), watch live progress.

Batch

Upload multiple files at once or configure a watch folder — queue view shows progress of all jobs.

Custom profiles

Set your own ffmpeg parameters for codec, bitrate and extra args — e.g. Plex/Jellyfin-optimized HEVC files.

GPU fallback

Automatic switch to software encoding on GPU errors, so no job fails outright.

Installation on any system

Docker & Docker Compose required. For GPU acceleration: see FAQ for suitable drivers/group IDs.

unzip medienconverter_release.zip -d media-converter
cd media-converter
docker compose up -d --build

Browser: http://SERVER-IP:8686. Default path: /opt/media-converter/.

Install Container Manager
ZIP to /volume1/docker/media-converter/
Via SSH: docker compose up -d --build

Tip: Synology Plus models often have an Intel iGPU (Celeron J4xxx/Pentium Gold) — VAAPI/QSV acceleration is available there.

Path usually /volume3/docker/. UGREEN DXP series has an Intel iGPU → GPU acceleration possible.

cd /volume3/docker
unzip medienconverter_release.zip -d media-converter
cd media-converter
docker compose up -d --build

Unraid: Compose Manager plugin, ZIP to /mnt/user/appdata/media-converter/. For NVIDIA GPU: install the NVIDIA plugin from linuxserver.io, extend the GPU section in Compose.

TrueNAS Scale: SSH preferred for custom Compose, use ZFS datasets for the watch folder (snapshots!).

Works in principle, but no GPU acceleration possible (Pi VideoCore encoder not included in standard ffmpeg builds). CPU encoding is very slow (Pi 5: ~0.3× realtime at 1080p H.264) — only worthwhile for occasional small files.

Works, but no GPU acceleration on macOS (Apple Silicon GPU cannot be passed through) and only limited on Windows (NVIDIA possible via WSL2, Intel iGPU not).

services:
  media-converter:
    devices:
      - /dev/dri:/dev/dri
    group_add:
      - "44"     # video group
      - "105"    # render group
    environment:
      - LIBVA_DRIVER_NAME=iHD

Check group IDs on the host: getent group video render. Test: docker exec media-converter vainfo.

sudo apt install nvidia-container-toolkit
sudo systemctl restart docker

services:
  media-converter:
    deploy:
      resources:
        reservations:
          devices:
            - driver: nvidia
              count: all
              capabilities: [gpu]
    environment:
      - NVIDIA_VISIBLE_DEVICES=all

Test: docker exec media-converter nvidia-smi.

Forward Port: 8686
Websockets: ENABLE  (for live progress)
SSL: Let's Encrypt
client_max_body_size: 10g  (for uploads)
proxy_read_timeout: 7200s  (for long conversions)

Frequently Asked Questions

Why does the conversion fail with a GPU error?

Usually incorrect group IDs (check getent group video render on the host) or an unsupported codec profile for the respective GPU generation. Fallback to CPU can be enabled in the settings.

How large can uploads be?

By default 2 GB per file, adjustable via MAX_UPLOAD_MB in the docker-compose.yml (e.g. up to 10 GB). For very large files, the watch folder is recommended instead of upload.

Why is the conversion very slow?

Check the job logs to see whether a GPU encoder (e.g. h264_qsv) is actually being used instead of libx264 (CPU). Even with GPU acceleration, 4K conversions are CPU-intensive during pre-/post-processing.

What can't the Media Converter do?

DRM-protected files, real-time streaming, online URL inputs (not a YouTube downloader), and classic video editor functions like cutting/trimming.

Does the tool work without a GPU?

Yes, with CPU fallback (libx264 etc.) — just correspondingly slower, especially with 4K material.

Price

Media Converter

GPU-accelerated batch converter — free for a limited time only.

Aktion - kostenlos

Video: H.264, H.265, AV1, VP9, MPEG-4 · Audio: MP3, AAC, FLAC, Opus, WAV, AC3, Vorbis
GPU: NVENC, VAAPI, QSV, AMF + CPU fallback
Root file system access (all NAS volumes)
NAS user authentication (/etc/shadow)
Docker-based, self-hosted, no subscription

Download for free

More products

Discover our other projects