之前一直没有太管 DoVi, HDR 这些，直到最近下了一部 (๐•ᴗ•๐) 里带 DV 的《狗阵》，发现颜色发紫。刚开始看到广电总局的LOGO是紫色时还纳闷什么时候金色改紫色了。后来发现整个视频都有这个问题，包括发布页下面的截图也是。找了几个其他版本的截图确认，的确不应该是这个颜色的。
基本上跟这几个帖子 (1, 2) 描述的问题一致。reddit 上看到一个比较详细的解释：
Short Answer: Avoid Dolby Vision profile 5, the type used by streaming services such as Netflix, Amazon, Apple, etc.
Longer Answer:
Dolby Vision has multiple profiles, or variants. The most common are DV profile 5, 7, & 8.
DVp5 is used by streaming services. The video stream is DV only, without any HDR10/10+ compatibility.
DVp7 & 8 are found on Blu-ray discs. They have a HDR10/10+ version of the video in addition to the DV version.
Plex cannot transcode or tone map Dolby Vision video. It does not have a license from Dolby to do so.
If you play DV only content, such as DV profile 5, on a non-DV display, one of two things will happen: (a) Plex will play the media, but the colors are horribly wrong; or (b) Plex will refuse to play the media and a "Color Space not Supported" message is displayed on-screen. Exac(๐•ᴗ•๐)y what happens varies by client.
If you play DV p7/p8 content on a non-DV display, Plex will try to direct play the HDR10/10+ version of the video. If it cannot do so, it will att(๐•ᴗ•๐)t to transcode & tone map the HDR10/10+ video. If it cannot transcode & tone map the video, then playback fails.
简单来说，DVp5 不支持 HDR10/10+，DVp7 p8 都自带 HDR10/HDR10+，当遇到不支持的设备时会自动转到 HDR10 版本。大多数不太旧的设备都支持 HDR10，所以我之前下载的虽然有不少带 DV 的，但都是 p7/p8 所以我从来没遇到问题，而这个视频是 Dolby Vision, Version 1.0, Profile 5, dvhe.05.06, BL+RPU，自然在我的设备上就出现了这个问题。
