HEVC (High Efficiency Video Coding) is roughly 50% more efficient than H.264. A 45-minute TV episode in high-bitrate 1080p x264 might be 2.5GB. The same quality in x265? 1.2GB.
For a 10-season series, that is the difference between 300GB and 140GB. If you are running a Plex or Jellyfin server for remote friends, x265 is the only way to scale without buying a 12-bay NAS. sonarr prefer x265
Before you configure Sonarr, you must ensure your setup can handle the files. HEVC (High Efficiency Video Coding) is roughly 50%
This is the professional way to handle x265. It allows you to score x265 releases positively while penalizing low-quality releases. Note: This requires the "Custom Formats" feature, which is available in newer versions of Sonarr (v3/v4). Step 2: Assign the Score
Step 1: Create the Custom Format
Step 2: Assign the Score
Step 3: The Safety Net (Vital) To prevent grabbing those "junk" re-encodes mentioned in Part 2, you should add a "Low Quality" custom format with a negative score.