Introduction: The Challenge of Managing a Large Video Library
Managing a collection of movies, series and documentaries on a NAS can quickly saturate the available space. Intelligent compression becomes essential to avoid costly purchases of additional drives.
This article details how Tdarr, an open‑source tool, reduced a media library’s size by one third without any noticeable difference on a 4K TV.
1. Why Choose Tdarr for Re‑encoding?
Tdarr stands out with its server‑node architecture that distributes tasks across multiple machines, optimizing speed and resource management.
It integrates FFmpeg and HandBrake, offering maximum flexibility in choosing the codec and encoding parameters.
Initial Setup: Server and Node
The central server indexes your library, applies defined rules and delegates tasks to the node. You can place the node on a dedicated PC or even another NAS to free up the power of your main machine.
Installation is simple: download the package, launch the service, then add your folders to process via the web interface.
2. The Benefits of the HEVC (H.265) Codec
HEVC offers up to 50% additional compression compared to H.264 while maintaining the same visual quality, especially noticeable on high‑resolution displays.
By converting your old H.264 files to HEVC, you reduce space usage without lowering resolution or bitrate to unacceptable levels.
Impact on Visual Quality
Tests performed on a 4K TV show that rendering differences are imperceptible, even for scenes with high motion density.
Loss of detail is compensated by HEVC’s advanced intraframe algorithm.
3. Creating Effective Re‑encoding Rules
Tdarr allows you to define rules based on codec, resolution or even metadata. You can thus target only 1080p H.264 files for conversion to 4K HEVC.
A typical rule: If codec = H.264 and bitrate > 5 Mbps then encode in HEVC with a target bitrate of 8 Mbps.
- Source codec: H.264
- Target resolution: 4K
- Target bitrate: 8 Mbps
4. Metadata Management and Integration with Plex
After re‑encoding, Tdarr preserves the original metadata (title, year, genre) via the re‑tagging option. This avoids having to reorganise your collection in a media server like Plex.
“Preserving metadata is crucial for maintaining a smooth user experience on home streaming platforms.” – Digital Media Management Expert
Plex Synchronisation
Plex automatically detects new encoded files and updates its library without manual intervention.
You thus benefit from a compact library while keeping the organisation intact.
5. Optimising NAS Server Performance
To avoid overloading your NAS, configure Tdarr to use only 70% of the CPU and 50% of RAM during processing.
Also schedule tasks outside peak usage hours to preserve network performance while streaming.
Conclusion: Space Savings Without Visual Compromise
Tdarr has proven that it is possible to compress a large video library while preserving the viewing experience on a 4K TV. By adopting this solution, you free up disk space and reduce infrastructure costs.
Try Tdarr today and transform your NAS into a truly optimised media vault!
