docs: Added initial technical document about video bit depth.

source/docs/en/latest/table-of-contents.markdown

@@ -130,6 +130,7 @@ Table of contents
   *How various settings affect encoding speed*
 - Video
   - [Video codecs](technical/video-codecs.html)<span class="notice draft"><span>draft</span></span>
+  - [10/12-bit encoding](technical/video-bit-depth.html)<span class="notice draft"><span>draft</span></span>
   - [Constant quality versus average bit rate](technical/video-cq-vs-abr.html)<span class="notice draft"><span>draft</span></span>
   - [Presets and tunes](technical/video-presets-tunes.html)<span class="notice draft"><span>draft</span></span>
   - [Profiles and levels](technical/video-profiles-levels.html)<span class="notice draft"><span>draft</span></span>

source/docs/en/latest/technical/video-bit-depth.markdown

@@ -0,0 +1,48 @@
+---
+Type:            article
+Title:           10 and 12bit encoding.
+Project:         HandBrake
+Project_URL:     https://handbrake.fr/
+Project_Version: Latest
+Language:        English
+Language_Code:   en
+Authors:         [ Scott (s55) ]
+Copyright:       2021 HandBrake Team
+License:         Creative Commons Attribution-ShareAlike 4.0 International
+License_Abbr:    CC BY-SA 4.0
+License_URL:     https://handbrake.fr/docs/license.html
+---
+
+10 and 12-bit encoding 
+===================
+
+## Supported Encoders
+
+The follow encoders support higher than 8-bit.
+
+| Encoder             |
+|---------------------|
+| x264                |
+| x265                |
+| Intel QuickSync     |
+| Apple Video Toolbox |
+
+Please note, you must select a "10-bit" or "12-bit" encoder from the "Video codec" dropdown on the "Video" tab to enable this feature.
+For hardware encoders, the option will only be shown if the system supports it. 
+
+### Limitations
+
+Some filters that ship with HandBrake, do not currently support higher than 8-bit.
+
+When these filters are enabled, HandBrake's pipeline will run at 8-bit rather than 10-bit or 12-bit.
+This applies to the following filters:
+
+- Detelecine
+- Decomb
+- Comb Detect
+- Denoise
+- Nlmeans
+- Chroma Smooth
+- Lapsharp
+- Unsharp
+- Grayscale