It optimizes motion estimation and intra-prediction, allowing the encoder to fit more detail into fewer bits. Using slow is a good alternative if slower takes too long. (or 2-Pass VBR)
If you are trying to in Handbrake or FFmpeg, would you like a breakdown of the specific CRF and preset values they typically used?
X265 is a video encoding standard that offers improved compression efficiency compared to its predecessor, H.264 (X264). This means that X265 encoded files can store more video data in a smaller file size, making them ideal for streaming and storage. X265 is also known as HEVC (High Efficiency Video Coding) and is widely supported by modern devices and media players. Rarbg X265 Encoding Settings
Advanced users often point to specific x265-params used by high-efficiency scene groups to preserve detail at low bitrates:
| Goal | Preset | CRF (x265) | Profile | Tune | |---|---:|---:|---|---| | Archival / Best quality | veryslow | 18–20 | main10 (4K/HDR) / main (8-bit) | film/grain | | Balanced / Everyday | slow | 20–22 | main10/main | film/animation | | Fast / Small | medium | 22–24 | main | none/animation | X265 is a video encoding standard that offers
But what was actually happening under the hood? Now that the site is gone, let’s reverse-engineer the settings that made a 1.5GB RARBG rip look better than a 4GB release from competitors.
ffmpeg -i "input.mkv" \ -map 0:V:0 -map 0:m:language:eng -map 0:s? -disposition:s:0 default \ -c:a eac3 -ac 6 -b:a 384k -c:s copy \ -c:v libx265 -pix_fmt yuv420p10le -preset slow -crf 22 -maxrate 4500K -bufsize 9M \ -x265-params "max-merge=5:limit-refs=3:rd=4:rc-lookahead=48:bframes=8:aq-mode=3" \ -vf "scale='trunc(min(1920/iw,1080/ih)*iw/2)*2':'trunc(min(1920/iw,1080/ih)*ih/2)*2':flags=lanczos" \ "output.mkv" Advanced users often point to specific x265-params used
: They typically used 2-pass encoding or a very strictly tuned CRF (Constant Rate Factor) of 22–24 to ensure predictable file sizes.
To replicate the "RARBG" look using tools like Handbrake or ffmpeg , you would focus on these specific x265 CLI parameters. 1. --preset Slower
, they avoided the blurring effect that the Sample Adaptive Offset (SAO) filter can sometimes cause on fine textures. Full Encoding String for Advanced Users If you are using
If you can tell me what source file you are using (e.g., 4K Blu-ray, 1080p Web-DL) and what your storage constraints are, I can recommend a specific CRF value to use.