I was testing libx265 encoder and I was that when psy-rd is enabled for 444 input, the quality is halved. Here are my encoding settings: # Video capture encoding settings cap_soundcommand "ffmpeg -f s16le -ar %s -ac 2 -i - -c:a aac -profile:a 1 -q:a 2.0 -y temp_a.nut" cap_videocommand "ffmpeg -f rawvideo -pix_fmt rgb24 -r %r -s %wx%h -i - -c:v libx265 -crf 25 -preset medium -y temp_v.nut" cap_muxcommand "ffmpeg -i temp_v.nut -i temp_a.nut -c copy -y %f" cap_tempfile1 "temp_a.nut" cap_tempfile2 "temp_v.nut" cap_remove_tempfiles 1 cap_wipescreen 0 cap_fps 60 ffmpeg version 2023-12-18-git-be8a4f80b9-full_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers built with gcc 12.2.0 (Rev10, Built by MSYS2 project) configuration: --enable-gpl --enable-version3 --enable-static --pkg-config=pkgconf --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libaribcaption --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-dxva2 --enable-d3d11va --enable-libvpl --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint libavutil 58. 34.100 / 58. 34.100 libavcodec 60. 35.100 / 60. 35.100 libavformat 60. 18.100 / 60. 18.100 libavdevice 60. 4.100 / 60. 4.100 libavfilter 9. 14.100 / 9. 14.100 libswscale 7. 6.100 / 7. 6.100 libswresample 4. 13.100 / 4. 13.100 libpostproc 57. 4.100 / 57. 4.100 Input #0, rawvideo, from 'fd:': Duration: N/A, start: 0.000000, bitrate: 5308416 kb/s Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 2560x1440, 5308416 kb/s, 60 tbr, 60 tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> hevc (libx265)) x265 [info]: HEVC encoder version 3.5+113-8787af124 x265 [info]: build info [Windows][GCC 13.2.0][64 bit] 8bit+10bit+12bit x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 x265 [warning]: halving the quality when psy-rd is enabled for 444 input. Setting cbQpOffset = 6 and crQpOffset = 6 x265 [info]: Main 4:4:4 profile, Level-5 (Main tier) x265 [info]: Thread pool created using 4 threads x265 [info]: Slices : 1 x265 [info]: frame threads / pool features : 2 / wpp(23 rows) x265 [info]: Coding QT: max CU size, min CU size : 64 / 8 x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra x265 [info]: ME / range / subpel / merge : hex / 57 / 2 / 3 x265 [info]: Keyframe min / max / scenecut / bias : 25 / 250 / 40 / 5.00 x265 [info]: Cb/Cr QP Offset : 6 / 6 x265 [info]: Lookahead / bframes / badapt : 20 / 4 / 2 x265 [info]: b-pyramid / weightp / weightb : 1 / 1 / 0 x265 [info]: References / ref-limit cu / depth : 3 / off / on x265 [info]: AQ: mode / str / qg-size / cu-tree : 2 / 1.0 / 32 / 1 x265 [info]: Rate Control / qCompress : CRF-25.0 / 0.60 x265 [info]: tools: rd=3 psy-rd=2.00 early-skip rskip mode=1 signhide tmvp x265 [info]: tools: b-intra strong-intra-smoothing lslices=8 deblock sao Output #0, nut, to 'temp_v.nut': Metadata: encoder : Lavf60.18.100 Stream #0:0: Video: hevc (HEVC / 0x43564548), gbrp(pc, gbr/unknown/unknown, progressive), 2560x1440, q=2-31, 60 fps, 61440 tbn Metadata: encoder : Lavc60.35.100 libx265 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A frame= 2 fps=0.6 q=31.6 size= 250kB time=00:00:00.00 bitrate=N/A speed= 0x frame= 6 fps=1.7 q=36.0 size= 252kB time=00:00:00.06 bitrate=30979.8kbits/s speed=0.0184x frame= 9 fps=2.2 q=35.9 size= 256kB time=00:00:00.11 bitrate=17975.5kbits/s speed=0.0281x frame= 13 fps=2.8 q=36.0 size= 256kB time=00:00:00.18 bitrate=11439.0kbits/s speed=0.0394x frame= 16 fps=3.1 q=27.2 size= 256kB time=00:00:00.23 bitrate=8987.8kbits/s speed=0.0451x frame= 18 fps=3.2 q=35.3 size= 256kB time=00:00:00.26 bitrate=7864.3kbits/s speed=0.0468x frame= 21 fps=3.4 q=34.0 size= 256kB time=00:00:00.31 bitrate=6622.6kbits/s speed=0.0511x frame= 25 fps=3.7 q=35.0 size= 256kB time=00:00:00.38 bitrate=5470.8kbits/s speed=0.057x frame= 31 fps=4.3 q=35.4 size= 256kB time=00:00:00.48 bitrate=4338.9kbits/s speed=0.0668x frame= 32 fps=4.1 q=28.7 size= 256kB time=00:00:00.50 bitrate=4194.3kbits/s speed=0.0645x frame= 33 fps=4.0 q=33.4 size= 256kB time=00:00:00.51 bitrate=4059.0kbits/s speed=0.0625x frame= 34 fps=3.9 q=35.4 size= 256kB time=00:00:00.53 bitrate=3932.2kbits/s speed=0.0607x frame= 37 fps=4.0 q=29.6 size= 256kB time=00:00:00.58 bitrate=3595.1kbits/s speed=0.0628x frame= 39 fps=4.0 q=29.5 size= 256kB time=00:00:00.61 bitrate=3400.8kbits/s speed=0.0628x frame= 40 fps=3.9 q=29.7 size= 512kB time=00:00:00.63 bitrate=6622.6kbits/s speed=0.0613x frame= 43 fps=4.0 q=29.8 size= 512kB time=00:00:00.68 bitrate=6138.0kbits/s speed=0.063x frame= 45 fps=4.0 q=30.2 size= 512kB time=00:00:00.71 bitrate=5852.5kbits/s speed=0.0631x frame= 47 fps=4.0 q=30.0 size= 512kB time=00:00:00.75 bitrate=5592.4kbits/s speed=0.0632x frame= 49 fps=4.0 q=30.0 size= 512kB time=00:00:00.78 bitrate=5354.4kbits/s speed=0.0632x frame= 50 fps=3.9 q=30.8 size= 512kB time=00:00:00.80 bitrate=5242.9kbits/s speed=0.062x frame= 52 fps=3.9 q=30.7 size= 768kB time=00:00:00.83 bitrate=7549.8kbits/s speed=0.0621x frame= 54 fps=3.9 q=30.7 size= 768kB time=00:00:00.86 bitrate=7259.4kbits/s speed=0.0622x frame= 55 fps=3.8 q=31.0 size= 768kB time=00:00:00.88 bitrate=7122.4kbits/s speed=0.0611x frame= 57 fps=3.8 q=30.8 size= 768kB time=00:00:00.91 bitrate=6863.4kbits/s speed=0.0612x frame= 60 fps=3.9 q=30.8 size= 1024kB time=00:00:00.96 bitrate=8677.9kbits/s speed=0.0624x frame= 62 fps=3.9 q=30.8 size= 1024kB time=00:00:01.00 bitrate=8388.6kbits/s speed=0.0625x frame= 64 fps=3.9 q=30.9 size= 1024kB time=00:00:01.03 bitrate=8118.0kbits/s speed=0.0625x frame= 66 fps=3.9 q=30.7 size= 1024kB time=00:00:01.06 bitrate=7864.3kbits/s speed=0.0626x frame= 67 fps=3.8 q=30.7 size= 1024kB time=00:00:01.08 bitrate=7743.3kbits/s speed=0.0617x frame= 69 fps=3.8 q=30.0 size= 1024kB time=00:00:01.11 bitrate=7512.2kbits/s speed=0.0618x frame= 71 fps=3.8 q=30.4 size= 1280kB time=00:00:01.15 bitrate=9118.1kbits/s speed=0.0619x frame= 72 fps=3.8 q=30.5 size= 1280kB time=00:00:01.16 bitrate=8987.8kbits/s speed=0.0611x frame= 75 fps=3.8 q=29.7 size= 1280kB time=00:00:01.21 bitrate=8618.4kbits/s speed=0.062x frame= 77 fps=3.8 q=29.8 size= 1280kB time=00:00:01.25 bitrate=8388.6kbits/s speed=0.0621x frame= 79 fps=3.8 q=29.5 size= 1280kB time=00:00:01.28 bitrate=8170.7kbits/s speed=0.0622x frame= 81 fps=3.8 q=29.0 size= 1536kB time=00:00:01.31 bitrate=9556.6kbits/s speed=0.0622x frame= 83 fps=3.8 q=27.9 size= 1536kB time=00:00:01.35 bitrate=9320.7kbits/s speed=0.0623x frame= 85 fps=3.8 q=33.8 size= 1536kB time=00:00:01.38 bitrate=9096.1kbits/s speed=0.0623x frame= 88 fps=3.9 q=34.1 size= 1792kB time=00:00:01.43 bitrate=10241.9kbits/s speed=0.0631x frame= 94 fps=4.0 q=36.0 size= 1792kB time=00:00:01.53 bitrate=9574.0kbits/s speed=0.066x frame= 100 fps=4.2 q=36.0 size= 1792kB time=00:00:01.63 bitrate=8987.8kbits/s speed=0.0688x frame= 104 fps=4.3 q=36.0 size= 1792kB time=00:00:01.70 bitrate=8635.3kbits/s speed=0.0701x frame= 109 fps=4.4 q=35.9 size= 1792kB time=00:00:01.78 bitrate=8231.8kbits/s speed=0.072x frame= 111 fps=4.4 q=34.1 size= 1792kB time=00:00:01.81 bitrate=8080.8kbits/s speed=0.0719x frame= 115 fps=4.5 q=27.2 size= 1792kB time=00:00:01.88 bitrate=7794.7kbits/s speed=0.073x frame= 118 fps=4.5 q=27.3 size= 1792kB time=00:00:01.93 bitrate=7593.1kbits/s speed=0.0734x frame= 119 fps=4.4 q=35.8 size= 1792kB time=00:00:01.95 bitrate=7528.2kbits/s speed=0.0726x frame= 120 fps=4.4 q=27.5 size= 1792kB time=00:00:01.96 bitrate=7464.4kbits/s speed=0.0718x frame= 122 fps=4.4 q=35.3 size= 1792kB time=00:00:02.00 bitrate=7340.0kbits/s speed=0.0717x frame= 125 fps=4.4 q=34.5 size= 1792kB time=00:00:02.05 bitrate=7161.0kbits/s speed=0.0722x frame= 129 fps=4.5 q=28.4 size= 2048kB time=00:00:02.11 bitrate=7926.2kbits/s speed=0.0731x frame= 130 fps=4.4 q=34.6 size= 2048kB time=00:00:02.13 bitrate=7864.3kbits/s speed=0.0724x frame= 133 fps=4.4 q=33.6 size= 2048kB time=00:00:02.18 bitrate=7684.2kbits/s speed=0.0728x frame= 135 fps=4.4 q=34.6 size= 2048kB time=00:00:02.21 bitrate=7568.7kbits/s speed=0.0727x frame= 137 fps=4.4 q=29.8 size= 2048kB time=00:00:02.25 bitrate=7456.5kbits/s speed=0.0726x frame= 139 fps=4.4 q=29.9 size= 2048kB time=00:00:02.28 bitrate=7347.7kbits/s speed=0.0724x frame= 140 fps=4.4 q=30.1 size= 2048kB time=00:00:02.30 bitrate=7294.4kbits/s speed=0.0718x frame= 142 fps=4.4 q=29.9 size= 2048kB time=00:00:02.33 bitrate=7190.2kbits/s speed=0.0717x frame= 144 fps=4.4 q=30.0 size= 2304kB time=00:00:02.36 bitrate=7975.1kbits/s speed=0.0716x frame= 146 fps=4.3 q=30.0 size= 2304kB time=00:00:02.40 bitrate=7864.3kbits/s speed=0.0715x frame= 148 fps=4.3 q=29.8 size= 2304kB time=00:00:02.43 bitrate=7756.6kbits/s speed=0.0714x frame= 150 fps=4.3 q=30.4 size= 2304kB time=00:00:02.46 bitrate=7651.8kbits/s speed=0.0713x frame= 152 fps=4.3 q=30.1 size= 2304kB time=00:00:02.50 bitrate=7549.7kbits/s speed=0.0712x frame= 153 fps=4.3 q=30.1 size= 2304kB time=00:00:02.51 bitrate=7499.7kbits/s speed=0.0706x frame= 155 fps=4.3 q=30.1 size= 2560kB time=00:00:02.55 bitrate=8224.1kbits/s speed=0.0705x frame= 156 fps=4.3 q=30.1 size= 2560kB time=00:00:02.56 bitrate=8170.7kbits/s speed=0.07x frame= 158 fps=4.2 q=29.9 size= 2560kB time=00:00:02.60 bitrate=8066.0kbits/s speed=0.0699x frame= 160 fps=4.2 q=30.3 size= 2560kB time=00:00:02.63 bitrate=7963.9kbits/s speed=0.0699x frame= 162 fps=4.2 q=29.6 size= 2560kB time=00:00:02.66 bitrate=7864.3kbits/s speed=0.0698x frame= 165 fps=4.3 q=27.6 size= 2560kB time=00:00:02.71 bitrate=7719.6kbits/s speed=0.0701x frame= 167 fps=4.3 q=32.5 size= 2560kB time=00:00:02.75 bitrate=7626.0kbits/s speed=0.0701x frame= 170 fps=4.3 q=33.4 size= 2816kB time=00:00:02.80 bitrate=8238.8kbits/s speed=0.0704x frame= 172 fps=4.3 q=28.8 size= 2816kB time=00:00:02.83 bitrate=8141.9kbits/s speed=0.0703x frame= 174 fps=4.3 q=29.9 size= 2816kB time=00:00:02.86 bitrate=8047.2kbits/s speed=0.0703x frame= 176 fps=4.3 q=29.9 size= 2816kB time=00:00:02.90 bitrate=7954.7kbits/s speed=0.0702x frame= 178 fps=4.3 q=30.1 size= 2816kB time=00:00:02.93 bitrate=7864.3kbits/s speed=0.0701x frame= 179 fps=4.2 q=30.0 size= 2816kB time=00:00:02.95 bitrate=7819.9kbits/s speed=0.0697x frame= 181 fps=4.2 q=29.9 size= 2816kB time=00:00:02.98 bitrate=7732.5kbits/s speed=0.0696x frame= 183 fps=4.2 q=30.0 size= 2816kB time=00:00:03.01 bitrate=7647.1kbits/s speed=0.0695x frame= 184 fps=4.2 q=30.4 size= 2816kB time=00:00:03.03 bitrate=7605.1kbits/s speed=0.0691x frame= 186 fps=4.2 q=30.2 size= 3072kB time=00:00:03.06 bitrate=8206.2kbits/s speed=0.0691x frame= 187 fps=4.2 q=30.3 size= 3072kB time=00:00:03.08 bitrate=8161.9kbits/s speed=0.0686x frame= 189 fps=4.2 q=30.2 size= 3072kB time=00:00:03.11 bitrate=8074.6kbits/s speed=0.0686x frame= 190 fps=4.1 q=30.3 size= 3072kB time=00:00:03.13 bitrate=8031.6kbits/s speed=0.0682x frame= 191 fps=4.1 q=30.3 size= 3072kB time=00:00:03.15 bitrate=7989.2kbits/s speed=0.0678x frame= 193 fps=4.1 q=29.8 size= 3328kB time=00:00:03.18 bitrate=8564.3kbits/s speed=0.0678x frame= 195 fps=4.1 q=30.2 size= 3328kB time=00:00:03.21 bitrate=8475.5kbits/s speed=0.0677x frame= 197 fps=4.1 q=29.5 size= 3328kB time=00:00:03.25 bitrate=8388.6kbits/s speed=0.0677x frame= 199 fps=4.1 q=28.6 size= 3328kB time=00:00:03.28 bitrate=8303.4kbits/s speed=0.0676x frame= 200 fps=4.1 q=28.1 size= 3328kB time=00:00:03.30 bitrate=8261.5kbits/s speed=0.0673x frame= 202 fps=4.1 q=27.4 size= 3584kB time=00:00:03.33 bitrate=8808.0kbits/s speed=0.0673x frame= 205 fps=4.1 q=33.6 size= 3584kB time=00:00:03.38 bitrate=8677.9kbits/s speed=0.0676x frame= 209 fps=4.1 q=27.1 size= 3584kB time=00:00:03.45 bitrate=8510.2kbits/s speed=0.0682x frame= 212 fps=4.1 q=35.9 size= 3584kB time=00:00:03.50 bitrate=8388.6kbits/s speed=0.0685x frame= 217 fps=4.2 q=36.0 size= 3840kB time=00:00:03.58 bitrate=8778.8kbits/s speed=0.0694x frame= 219 fps=4.2 q=27.4 size= 3840kB time=00:00:03.61 bitrate=8697.9kbits/s speed=0.0694x frame= 221 fps=4.2 q=35.9 size= 3840kB time=00:00:03.65 bitrate=8618.4kbits/s speed=0.0693x frame= 223 fps=4.2 q=36.1 size= 3840kB time=00:00:03.68 bitrate=8540.4kbits/s speed=0.0693x frame= 227 fps=4.2 q=35.2 size= 3840kB time=00:00:03.75 bitrate=8388.6kbits/s speed=0.0698x frame= 231 fps=4.3 q=35.7 size= 3840kB time=00:00:03.81 bitrate=8242.1kbits/s speed=0.0704x frame= 234 fps=4.3 q=28.7 size= 3840kB time=00:00:03.86 bitrate=8135.5kbits/s speed=0.0707x frame= 238 fps=4.3 q=28.7 size= 3840kB time=00:00:03.93 bitrate=7997.6kbits/s speed=0.0712x frame= 241 fps=4.3 q=33.5 size= 3840kB time=00:00:03.98 bitrate=7897.2kbits/s speed=0.0715x frame= 241 fps=4.3 q=33.5 size= 3840kB time=00:00:03.98 bitrate=7897.2kbits/s speed=0.0708x frame= 241 fps=4.2 q=33.5 size= 3840kB time=00:00:03.98 bitrate=7897.2kbits/s speed=0.0701x frame= 245 fps=4.3 q=34.7 size= 3840kB time=00:00:04.05 bitrate=7767.2kbits/s speed=0.0707x frame= 247 fps=4.3 q=30.3 size= 3840kB time=00:00:04.08 bitrate=7703.8kbits/s speed=0.0706x frame= 249 fps=4.3 q=30.3 size= 4096kB time=00:00:04.11 bitrate=8150.9kbits/s speed=0.0706x frame= 249 fps=4.2 q=30.3 size= 4096kB time=00:00:04.11 bitrate=8150.9kbits/s speed=0.07x frame= 251 fps=4.2 q=27.0 size= 4096kB time=00:00:04.15 bitrate=8085.4kbits/s speed=0.0699x frame= 252 fps=4.2 q=29.4 size= 4352kB time=00:00:04.16 bitrate=8556.4kbits/s speed=0.0696x frame= 253 fps=4.2 q=29.7 size= 4352kB time=00:00:04.18 bitrate=8522.3kbits/s speed=0.0693x frame= 255 fps=4.2 q=29.8 size= 4352kB time=00:00:04.21 bitrate=8454.9kbits/s speed=0.0692x frame= 257 fps=4.2 q=29.6 size= 4352kB time=00:00:04.25 bitrate=8388.6kbits/s speed=0.0692x frame= 260 fps=4.2 q=29.8 size= 4608kB time=00:00:04.30 bitrate=8778.8kbits/s speed=0.0694x frame= 262 fps=4.2 q=30.2 size= 4608kB time=00:00:04.33 bitrate=8711.2kbits/s speed=0.0694x frame= 264 fps=4.2 q=30.4 size= 4608kB time=00:00:04.36 bitrate=8644.7kbits/s speed=0.0693x frame= 265 fps=4.2 q=30.2 size= 4608kB time=00:00:04.38 bitrate=8611.9kbits/s speed=0.069x frame= 267 fps=4.2 q=30.0 size= 4608kB time=00:00:04.41 bitrate=8546.9kbits/s speed=0.069x frame= 269 fps=4.2 q=30.1 size= 4864kB time=00:00:04.45 bitrate=8954.1kbits/s speed=0.069x frame= 271 fps=4.2 q=30.0 size= 4864kB time=00:00:04.48 bitrate=8887.6kbits/s speed=0.0689x frame= 273 fps=4.2 q=30.5 size= 4864kB time=00:00:04.51 bitrate=8822.0kbits/s speed=0.0689x frame= 275 fps=4.2 q=29.4 size= 4864kB time=00:00:04.55 bitrate=8757.3kbits/s speed=0.0689x frame= 276 fps=4.1 q=30.4 size= 4864kB time=00:00:04.56 bitrate=8725.4kbits/s speed=0.0686x frame= 279 fps=4.2 q=32.3 size= 4864kB time=00:00:04.61 bitrate=8630.9kbits/s speed=0.0688x frame= 280 fps=4.1 q=30.6 size= 4864kB time=00:00:04.63 bitrate=8599.8kbits/s speed=0.0685x frame= 281 fps=4.1 q=30.5 size= 4864kB time=00:00:04.65 bitrate=8569.0kbits/s speed=0.0683x frame= 282 fps=4.1 q=29.2 size= 5120kB time=00:00:04.66 bitrate=8987.8kbits/s speed=0.068x frame= 288 fps=4.2 q=36.0 size= 5120kB time=00:00:04.76 bitrate=8799.2kbits/s speed=0.0689x [out#0/nut @ 0000022c5b21d680] video:5242kB audio:0kB subtitle:0kB other streams:0kB global headers:2kB muxing overhead: 0.149640% frame= 290 fps=4.2 q=36.1 Lsize= 5250kB time=00:00:04.80 bitrate=8959.3kbits/s speed=0.0694x x265 [info]: frame I: 2, Avg QP:25.94 kb/s: 118883.52 x265 [info]: frame P: 173, Avg QP:29.64 kb/s: 12860.30 x265 [info]: frame B: 115, Avg QP:34.99 kb/s: 984.95 x265 [info]: Weighted P-Frames: Y:2.3% UV:2.3% encoded 290 frames in 69.16s (4.19 fps), 8882.30 kb/s, Avg QP:31.74 I stopped the encoding right away. Last time, I encoded the Video Capture in Lossless audio and video codecs (ffv1 and flac) and stored them in .mkv container. While encoding with the previous lossless video in libx265, and in aac audio, I had got VMAF score of around 72 for 1080p CRF=28 -preset medium. But, when I encoded the same video in CRF 23 and libx264, preset medium, aac audio, I got VMAF score of around 96! The libx265 ffmpeg encoding settings say that CRF of 28 for libx265 should be same of CRF=23 of libx264, but I am getting very low VMAF scores, at CRF=28, ffmpeg. I think, psy-rd is the main reason for decrease in video quality. How to fix this issue ? Can anyone please help me ?