Sonarr Prefer X265 -

How to Configure Sonarr to Prefer x265 (HEVC) Releases If you are looking to save disk space without sacrificing visual quality, configuring to prefer x265 (also known as HEVC ) is one of the most effective optimizations you can make. x265 releases typically offer 40-50% smaller file sizes compared to traditional x264 while maintaining similar or better clarity.

"name": "Not x264", "implementation": "ReleaseTitleSpecification", "negate": true, "required": false, "fields": \\bavc\\b"

: High-definition 1080p files that might take up 2GB in x264 can often be compressed to under 800MB in x265.

However, TRaSH Guides acknowledges that if you are storage-constrained and need to save space, using x265 for HD content is acceptable, understanding that you may sacrifice some quality for space (typically 10-20% savings).

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Sonarr prioritizes releases using a "Score." We will create a Custom Format that assigns positive points to x265, making it win against x264 releases of the same quality.

In the Regular Expression (Regex) field, paste the following string: \b([hx]265|hevc)\b Click . Step 2: Assign a Score in Your Quality Profile

Release Profiles let you score releases or block based on words.

At very low bitrates (small file sizes), x264 can look like a blocky mess. x265 maintains better detail. However, at high bitrates (high quality), the visual difference between a well-encoded x264 and a well-encoded x265 is negligible to most human eyes. You are sacrificing CPU power for space, not necessarily for "better looking" video. How to Configure Sonarr to Prefer x265 (HEVC)

I can provide specific regex adjustments or compatibility tips tailored to your infrastructure. Share public link

Some scene groups incorrectly tag non-x265 releases with the word "HEVC" in the description. To be safe, let's create another Custom Format called Not-x264 (we won't use it), but actually, we need an anti-av1 rule.

Paste the following regular expression (Regex) into the text box: \b([hx].?265|hevc)\b Check the box for if available, then click Save . Step 2: Assign Scores in Quality Profiles Go to Settings > Profiles .

This is the most common mistake. You want high-quality x265 encodes, not low-quality re-encodes. However, TRaSH Guides acknowledges that if you are

A release named Show.S01E01.1080p.x265 gets +100 . A release named Show.S01E01.1080p.x264 gets 0 (or -10 ). The x265 wins every time.

Before configuring the software, it is vital to understand why upgrading your library to x265 is mathematically and visually advantageous. 1. Massive Storage Savings

This guide explains how to configure Sonarr to prioritize x265 releases automatically. Why Prefer x265 in Sonarr?