#8544: LUTRGB inaccurate, affects other colors ----------------------------------+--------------------------------------- Reporter: chris319 | Type: defect Status: new | Priority: important Component: ffmpeg | Version: unspecified Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | ----------------------------------+--------------------------------------- Summary of the bug: LUTRGB inaccurate, affects other colors. When used on a white raster of R=255,G=255,B=255, LUTRGB=r=clip(val,47,194) returns:R=188,G=249,B=255. LUTRGB is not clipping to specified value of 194 and is affecting the green channel which is not specified in the command. Pixel format is RGB24 — no subsampling. Above command should return R=194,G=255,B=255, leaving green and blue unchanged. How to reproduce: {{{ ffmpeg -y -i "White.mp4" -c:v libx265 -crf 0 -vf scale=in_range=limited:in_color_matrix=bt709,format=rgb24,lutrgb='r=clip(val,47,194)',scale=out_color_matrix=bt709:out_range=full,format=rgb24 -r 59.94 -an clipped.mp4 Console output: ffmpeg -y -i "White.mp4" -c:v libx265 -crf 0 -vf scale=in_range=full:in_color_matrix=bt709,format=rgb24,lutrgb='r=clip(val,47,194)',scale=out_color_matrix=bt709:out_range=full,format=rgb24 -r 59.94 -an clipped.mp4 ffmpeg version git-2019-12-02-968c4cb Copyright (c) 2000-2019 the FFmpeg developers built with gcc 9.2.1 (GCC) 20191125 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable- fontconfig --enable-gnutls --enable-iconv --enable-libass --enable- libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable- libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf libavutil 56. 36.101 / 56. 36.101 libavcodec 58. 64.101 / 58. 64.101 libavformat 58. 35.100 / 58. 35.100 libavdevice 58. 9.101 / 58. 9.101 libavfilter 7. 67.100 / 7. 67.100 libswscale 5. 6.100 / 5. 6.100 libswresample 3. 6.100 / 3. 6.100 libpostproc 55. 6.100 / 55. 6.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'White.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf58.29.100 Duration: 00:00:04.00, start: 0.000000, bitrate: 20 kb/s Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709/unknown/bt709), 1920x1080 [SAR 1:1 DAR 16:9], 16 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default) Metadata: handler_name : VideoHandler Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265)) Press [q] to stop, [?] for help x265 [info]: HEVC encoder version 3.2+15-04db2bfee5d6 x265 [info]: build info [Windows][GCC 9.2.1][64 bit] 8bit+10bit x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX 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-4.1 (Main tier) x265 [info]: Thread pool created using 8 threads x265 [info]: Slices : 1 x265 [info]: frame threads / pool features : 3 / wpp(17 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-0.0 / 0.60 x265 [info]: tools: rd=3 psy-rd=2.00 early-skip rskip signhide tmvp b-intra x265 [info]: tools: strong-intra-smoothing lslices=6 deblock sao Output #0, mp4, to 'clipped.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf58.35.100 Stream #0:0(und): Video: hevc (libx265) (hev1 / 0x31766568), gbrp, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 59.94 fps, 11988 tbn, 59.94 tbc (default) Metadata: handler_name : VideoHandler encoder : Lavc58.64.101 libx265 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A frame= 239 fps= 28 q=-0.0 Lsize= 36kB time=00:00:03.93 bitrate= 75.5kbits/s dup=139 drop=0 speed=0.454x video:31kB audio:0kB subtitle:0kB other streams:0kB global headers:2kB muxing overhead: 18.843916% x265 [info]: frame I: 1, Avg QP:7.53 kb/s: 721.68 x265 [info]: frame P: 76, Avg QP:8.00 kb/s: 62.57 x265 [info]: frame B: 162, Avg QP:10.72 kb/s: 55.94 x265 [info]: Weighted P-Frames: Y:0.0% UV:0.0% x265 [info]: consecutive B-frames: 28.6% 11.7% 19.5% 1.3% 39.0% encoded 239 frames in 8.64s (27.67 fps), 60.84 kb/s, Avg QP:9.84 ffmpeg version built on ... }}} Patches should be submitted to the ffmpeg-devel mailing list and not this bug tracker. -- Ticket URL: <https://trac.ffmpeg.org/ticket/8544> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker