今天下载了一部UHD老片：莫扎特传，应该是HDS压制的重编码，下载后所有播放器都显示色彩不对，我看了一下视频信息：
Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L6.1@High
Codec ID : V_MPEGH/ISO/HEVC
Duration : 2 h 40 min
Bit rate : 21.3 Mb/s
Width : 3 840 pixels
Height : 1 604 pixels
Display aspect ratio : 2.40:1
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.144
Stream size : 23.9 GiB (82%)
Title : ql4321@HDSky
Writing library : x265 - H.265/HEVC codec
Default : Yes
Forced : No
居然连HDR视频最起码的Color primaries和Transfer characteristics都没有，也许是特殊UHD，因为我碰到过有SDR制作的UHD，但是我检查了一下REMUX版（也是HDS出品的）的视频信息：
Video
ID : 1
ID in the original source medium : 4113 (0x1011)
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5.1@High
HDR format : SMPTE ST 2086, HDR10 compatible
Codec ID : V_MPEGH/ISO/HEVC
Duration : 2 h 40 min
Bit rate : 62.8 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0 (Type 2)
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.316
Stream size : 70.2 GiB (93%)
Language : English
Default : No
Forced : No
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : PQ
Matrix coefficients : BT.2020 non-constant
Mastering display color primaries : Display P3
Mastering display luminance : min: 0.0001 cd/m2, max: 1000 cd/m2
Maximum Content Light Level : 690 cd/m2
Maximum Frame-Average Light Level : 74 cd/m2
Original source medium : Blu-ray
很明显HDR视频最关键的两个参数都是有的：
Color primaries : BT.2020
Transfer characteristics : PQ
我就奇怪了，怎么UHD重编码会连这两大最基本的HDR参数都会搞丢？HDS也算是国内一线压制组了，为啥会犯下如此低级的错误，其用的是啥压制软件啊？
Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L6.1@High
Codec ID : V_MPEGH/ISO/HEVC
Duration : 2 h 40 min
Bit rate : 21.3 Mb/s
Width : 3 840 pixels
Height : 1 604 pixels
Display aspect ratio : 2.40:1
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.144
Stream size : 23.9 GiB (82%)
Title : ql4321@HDSky
Writing library : x265 - H.265/HEVC codec
Default : Yes
Forced : No
居然连HDR视频最起码的Color primaries和Transfer characteristics都没有，也许是特殊UHD，因为我碰到过有SDR制作的UHD，但是我检查了一下REMUX版（也是HDS出品的）的视频信息：
Video
ID : 1
ID in the original source medium : 4113 (0x1011)
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5.1@High
HDR format : SMPTE ST 2086, HDR10 compatible
Codec ID : V_MPEGH/ISO/HEVC
Duration : 2 h 40 min
Bit rate : 62.8 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0 (Type 2)
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.316
Stream size : 70.2 GiB (93%)
Language : English
Default : No
Forced : No
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : PQ
Matrix coefficients : BT.2020 non-constant
Mastering display color primaries : Display P3
Mastering display luminance : min: 0.0001 cd/m2, max: 1000 cd/m2
Maximum Content Light Level : 690 cd/m2
Maximum Frame-Average Light Level : 74 cd/m2
Original source medium : Blu-ray
很明显HDR视频最关键的两个参数都是有的：
Color primaries : BT.2020
Transfer characteristics : PQ
我就奇怪了，怎么UHD重编码会连这两大最基本的HDR参数都会搞丢？HDS也算是国内一线压制组了，为啥会犯下如此低级的错误，其用的是啥压制软件啊？
