Merge pull request #37 from Netruk44/upscale-readme

Add notes about upscale quality and file sizes

README.md

@@ -160,6 +160,21 @@ Process an MKV file:
 bd-to-avp --source /path/to/movie.mkv --output-root-folder /path/to/output --transcode-audio
 ```
 
+## Upscale Quality
+For most users, the default values of 75 HEVC Quality and 75 Upscale Quality provides a good tradeoff of preserving all the details of the original film, the extra details generated by the upscaler, while also keeping the size of the resulting video manageable.
+
+If you would like to change the default quality, here are some recommended alternative settings sorted by final output size, with some notes about the quality of the results.
+
+HEVC Quality | Upscale Quality | Min Processing Space Needed | Final Size | Notes
+-- | -- | -- | -- | --
+85 | 85 | ~ 225 GB | ~ 95 GB | These settings are arguably "too" high. Only for those obsessed with maintaining the best possible quality.
+85 | 50 | ~ 130 GB | ~ 62 GB | A reasonable choice for "Best Quality" encoding.
+75 | 75 | ~ 100 GB | ~ 47 GB | The default setting.
+75 | 50 | ~ 75 GB | ~ 37 GB | Provides a good trade-off for minimizing storage space while retaining quality throughout the process.
+65 | 65 | ~ 75 GB | ~ 32 GB | Compression artifacting is very visible in dark scenes or on fast-moving objects, but is otherwise okay.
+
+HEVC Quality values below 65 are not recommended when upscaling. At that quality level, you are essentially upscaling compression artifacts. Keeping the video in 1080p and increasing the HEVC Quality will result in a better viewing experience.
+
 ## Note on Blu-ray drives
 
 If your BD drive does not seem to be compatible with your M-series Mac, it's possible that the error is related to the