Update Readme

README.md

@@ -47,26 +47,7 @@
   * 字幕亮度峰值，默认 100 nit
 
     如果输出字幕太亮，可以调低。反之亦然。
-
-* `-o --output-brightness`
-  * 屏幕亮度峰值，默认 1000 nit
-
-	实际只会使用字幕与屏幕亮度比例，可以无视
-
-* `-c --colourspace`
-  * 输出色域，可选值为 dcip3 与 bt2020，默认bt2020
-
-	如果希望颜色更艳丽一些可以调为dcip3
-
-* `-g --gamma`
-  * 调整输出时使用的oetf，可选值为pq, hlg, 和hybrid。默认pq
-	* 该值需要吻合视频显示时使用的OETF
-	* pq: 大多数视频在显示时会使用PQ 作为OETF
-	* hlg: 少数视频，通常来自于传统电视台，可能会使用HLG
-	* hybrid: 实验性功能。由于在HDR视频master时昏暗的场景通常比SDR版本更暗，
-	所以暗色调字幕在观看时更容易出现过亮情况。hybrid模式在低亮度时使用hlg，在高亮度时使用pq
-	可以一定程度上缓解这一问题。（不过这做法没任何严谨性可言恩≡ω≡...）
-
+
 * `-f --file`
   * 字幕文件，缺失状态下会弹出文件选择窗口。
 
@@ -121,29 +102,6 @@ The script supports some simple command line options. All arguments are optional
 
     If the processed subtitle is too bright, decrease this value, and vice versa.
 
-* `-o --output-brightness`
-  * Peak brightness for the display. Default: 1000 nit
-
-    The important part is the ratio between screen and subtitle brightness.
-	You can probably ignore this.
-
-* `-c --colourspace`
-  * Output colourspace, value should be one of dcip3 and bt2020. Default: bt2020
-
-    Use dcip3 if you prefer slightly more saturated colours.
-
-* `-g --gamma`
-  * Change the OETF used for output RGB conversion. Options values are pq, hlg, 
-  and hybrid.
-	  * This should match the OETF expected by the display.
-	  * pq: most content should use the PQ curve for OETF.
-	  * hlg: some content, likely from traditional broadcasts, might use HLG
-	  * hybrid: experimental feature. When in HDR mastering, dark scenes tends
-	  to be darker than the same scene in SDR. This would lead make darker subtitle
-	  appear brighter than it should be, even after processing. Hybrid mode attempt
-	  to solve this by using HLG for darker subtitles and PQ for brighter ones.	
-	  (and yes, this is technically wrong in many many ways)
-
 * `-f --file`
   * Subtitle files. A popup will be used if this is missing.