diff --git a/IIDX-Play-Recording.md b/IIDX-Play-Recording.md
index 3f827ec..0340c61 100644
--- a/IIDX-Play-Recording.md
+++ b/IIDX-Play-Recording.md
@@ -55,4 +55,15 @@ You can adjust the video quality (compression level), framerate, and audio bitra
 
 As of version `24-12-30`, spice2x will let you adjust the video quality using `IIDX NVENC Quality (-iidxreccqp)` option. Framerate and audio bitrate will still need to be done via patches.
 
+#### Quality value and resulting file
+
+Based on 冥 SPA which is about 2:20 long, at default 60FPS framerate and default audio quality,
+
+* For the game default value of `p=36, b=39, intra=33`, the resulting video is 52MB.
+* At `p=b=i=30`, 85MB.
+* At `p=b=i=25`, 135MB.
+* At `p=b=i=20`, 200MB.
+
+Note: some patchers will have different values for above - this is because the patchers are patching one part of the code, but the game later adds +8 to all three values before calling into NVENC recording API.
+
 Make sure your server operator allows for these modifications.
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