README.md

Graphics patch explained for dummies:

As per WhateverGreen states, the kext can apply various patches for different GPUs.

In my case I had to patch the iGPU (Intel UHD Graphics 620) to correctly recognize the HDMI connector my laptop comes with.

<key>PciRoot(0x0)/Pci(0x2,0x0)</key>
			<dict>
				<key>AAPL,ig-platform-id</key>
				<data>AADAhw==</data>
				<key>backlight-smoother-interval</key>
				<data>BwAAAA==</data>
				<key>backlight-smoother-steps</key>
				<data>IwAAAA==</data>
				<key>backlight-smoother-threshold</key>
				<data>LAEAAA==</data>
				<key>device-id</key>
				<data>FlkAAA==</data>
				<key>enable-backlight-smoother</key>
				<data>AQAAAA==</data>
				<key>framebuffer-con0-alldata</key>
				<data>AAAIAAIAAACYAAAA</data>
				<key>framebuffer-con0-enable</key>
				<data>AQAAAA==</data>
				<key>framebuffer-con1-alldata</key>
				<data>AQUJAAAIAACHAQAA</data>
				<key>framebuffer-con1-enable</key>
				<data>AQAAAA==</data>
				<key>framebuffer-con2-alldata</key>
				<data>AgQKAAAEAACHAQAA</data>
				<key>framebuffer-con2-enable</key>
				<data>AQAAAA==</data>
				<key>framebuffer-patch-enable</key>
				<data>AQAAAA==</data>
				<key>model</key>
				<string>Intel UHD Graphics 620</string>
			</dict>

Below a simple (I hope) explanation of the graphics patch. For more infos check out the documentation from WhateverGreen and Dortania's OpenCore Post Install guide for BusID patching

Key	Type	Value (BASE-64)	Value (plain)	Description
AAPL,ig-platform-id	Data	AADAhw==	0000C087	Sets correct framebuffer for Kaby Lake-R's UHD 620
backlight-smoother-interval	Data	BwAAAA==	07000000	Backlight smoother interval for LVDS display
backlight-smoother-steps	Data	IwAAAA==	23000000	Backlight smoother steps for LVDS display
backlight-smoother-threshold	Data	LAEAAA==	2C010000	Backlight smoother tresholds for LVDS display
device-id	Data	FlkAAA==	16590000	Custom device id for Kaby Lake-R's UHD 620 as Dortania's OpenCore Install Guide for Kaby Lake laptop states
enable-backlight-smoother	Data	AQAAAA==	01000000	Enable the backlight smoother for LVDS display
framebuffer-con0-alldata	Data	AAAIAAIAAACYAAAA	00000800 02000000 98000000	Default connector patch for LVDS display: Bus ID 00, Pipe number 08, Connector type 02000000 for LVDS display, default flags (idk wtf they actually mean tbf)
framebuffer-con0-enable	Data	AQAAAA==	01000000	Enables WhateverGreen patching for connector #0 (LVDS display)
framebuffer-con1-alldata	Data	AQUJAAAIAACHAQAA	01050900 00080000 87010000	Default connector patch for HDMI connector: Bus ID 05, Pipe number 09, Connector type 0008000 for HDMI connector, default flags (idk wtf they actually mean tbf)
framebuffer-con1-enable	Data	AQAAAA==	01000000	Enables WhateverGreen patching for connector #1 (HDMI connector)
framebuffer-con2-alldata	Data	AgQKAAAEAACHAQAA	02040A00 00040000 87010000	Default connector patch for USB-C DP connector: Bus ID 04, Pipe number 0A (10 in dec), Connector type 0004000 for DP connector, default flags (idk wtf they actually mean tbf)
framebuffer-con2-enable	Data	AQAAAA==	01000000	Enables WhateverGreen patching for connector #2 (theoretically USB-C DisplayPort but never tested to be fair)
framebuffer-patch-enable	Data	AQAAAA==	01000000	Enables WhateverGreen patching
model	String		Intel UHD Graphics 620	Custom name for the iGPU device. Can be anything to be fair

Hardware Acceleration

According to Intel Quick Sync Video Wikipedia article, my CPU supports both encoding and decoding in AVC (L5.1) (aka H.264) as well as both encoding and decoding in HEVC up to HEVC (10-bit).

For better readability I created a markdown table of the Wikipedia article table:

	[Cantiga](https://en.wikipedia.org/wiki/Centrino#Montevina_platform_(2008)	Clarkdale/Arrandale	Sandy Bridge	Ivy Bridge/Haswell	Broadwell	Braswell/Cherry Trail	Skylake	Apollo Lake	Kaby Lake/Coffee Lake/Comet Lake/Whiskey Lake	Gemini Lake	Ice Lake/Jasper Lake	Tiger Lake	Rocket Lake/Alder Lake/Raptor Lake	Arc Alchemist/Meteor Lake/Arrow Lake
MPEG-2	⚠️ Decode only	⚠️ Decode only	⚠️ Decode only	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅
AVC	❌	⚠️ Decode only	✅	✅	✅	✅ (L5.2/L5.1)	✅ (L5.1)	✅ (L5.2)	✅ (L5.1)	✅ (L5.2)	✅ (L5.2/L5.1)	✅	✅	✅
VC-1	❌	❌	⚠️ Decode only	⚠️ Decode only	⚠️ Decode only	⚠️ Decode only	⚠️ Decode only	⚠️ Decode only	⚠️ Decode only	⚠️ Decode only	⚠️ Decode only	⚠️ Decode only	⚠️ Decode only	⚠️ Decode only
JPEG	❌	❌	❌	⚠️ Decode only	⚠️ Decode only	✅	✅	✅	✅	✅	✅	✅	✅	✅
VP8	❌	❌	❌	❌	⚠️ Decode only	✅	✅	✅	✅	✅	✅	⚠️ Decode only	❌	❌
HEVC	❌	❌	❌	❌	❌	⚠️ Decode only (L5)	✅ (L5.1)	✅ (L5.1/L5)	✅ (L5.1)	✅ (L5.1/L5)	✅ (L5.1)	✅	✅	✅
HEVC 10-bit	❌	❌	❌	❌	❌	❌	❌	⚠️ Decode only (8K)	✅	✅	✅	✅	✅	✅
HEVC 12-bit	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	⚠️ Decode and Encode (only 4:2:0 encode)	⚠️ Decode and Encode (only 4:2:0 encode)	⚠️ Decode and Encode (only 4:2:0 encode)
VP9	❌	❌	❌	❌	❌	❌	❌	⚠️ Decode only (4K)	⚠️ Partial (Encoding on Linux only)	✅	✅	✅	✅	✅
VP9 10-bit	❌	❌	❌	❌	❌	❌	❌	❌	⚠️ Decode only	⚠️ Decode only	✅	✅	✅	✅
VP9 12-bit	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	⚠️ Decode only	⚠️ Decode only	⚠️ Decode only
AV1	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	⚠️ Decode only	⚠️ Decode only	✅
AV1 10-bit	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	⚠️ Decode only	⚠️ Decode only	✅
AV1 12-bit	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	⚠️ Decode only
EVC	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌
VVC	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌

After correctly configuring my graphics patch VideoProc correctly recognizes both H.264 and HEVC decoding/encoding: