The most effective way to tell Sonarr what you want is through . This allows you to "score" specific terms found in release titles. Navigate to Settings > Custom Formats . Click the + icon to create a new format. Name: Call it "x265 HEVC". Specifications: Add a new specification. Select Release Title as the type. In the Regular Expression field, enter: (?i)x265|HEVC . Save the format. Step 2: Configure Your Quality Profile
This is the phase where you auto-replace your old x264 files. sonarr prefer x265
Tip: This matches common naming conventions like x265 , h.265 , or HEVC . Click . Step 2: Assign a Score in Your Quality Profile The most effective way to tell Sonarr what