#7978: inaccurate conversion from YCbCr Narrow range to RGB Full range
-------------------------------------+-------------------------------------
Reporter: cepesh | Type: defect
Status: new | Priority: important
Component: | Version: 4.1
undetermined |
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug: inaccurate conversion from YCbCr Narrow range to RGB
Full range
How to reproduce:
{{{
Command line:
"C:\\tools\\ffmpeg-4.1.3\\bin\\ffmpeg.exe" -loglevel debug -report -s
3840x2160 -vcodec v210 -i YUV_pattern-2fr.v210 -vf
"scale=in_color_matrix=bt2020:in_range=tv" -vframes 1 tiff_bug_00.tiff -y
ffmpeg version 4.1.3 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 8.3.1 (GCC) 20190414
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-
fontconfig --enable-gnutls --enable-iconv --enable-libass --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-amf --enable-
ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec
--enable-dxva2 --enable-avisynth
libavutil 56. 22.100 / 56. 22.100
libavcodec 58. 35.100 / 58. 35.100
libavformat 58. 20.100 / 58. 20.100
libavdevice 58. 5.100 / 58. 5.100
libavfilter 7. 40.101 / 7. 40.101
libswscale 5. 3.100 / 5. 3.100
libswresample 3. 3.100 / 3. 3.100
libpostproc 55. 3.100 / 55. 3.100
}}}
100% White
Source YCbCr value = 0x03ac, 0x0200, 0x0200 (940, 512, 512)
Observed RGB value = 65283, 65283, 65283
Expected RGB value = 65535, 65535, 65535
58% White
Source YCbCr value = 0x023c, 0x0200, 0x0200 (572, 512, 512)
Observed RGB value = 37858, 37858, 37858
Expected RGB value = 38004, 38004, 38004
100% Magenta
Source YCbCr value = 0x015a, 0x343, 0x039c
Observed RGB value = 65280, 0, 65289
Expected RGB value = 65533, 0, 65535
--
Ticket URL: <https://trac.ffmpeg.org/ticket/7978>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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