Enabling Hardware decoding in Chrome/Chromium browser on Manjaro

Install chrome or chromium

Create a file named chrome-flags.conf in you .config folder
```
 touch ~/.config/chrome-flags.conf
```

(If you are using chromium make a file named chromium-flags.conf instead)

Populate the file with this

 --ignore-gpu-blocklist
 --enable-gpu-rasterization
 --enable-zero-copy
 --enable-features=VaapiVideoDecoder

a. Check if vaapi drivers are installed
```
 Vainfo
```
(If you get command not found install vainfo with sudo pacman -S libva-utils)

Look for
```
vainfo: VA-API version: 1.12 (libva 2.11.1)
vainfo: Driver version: Splitted-Desktop Systems VDPAU backend for VA-API - 0.7.4
```
b. Check if vdpau drivers are installed
```
 vdpauinfo
```
(If you get command not found install sudo pacman -S vdpauinfo)

Look for:
```
 display: :1   screen: 0	API version: 1
 Information string: NVIDIA VDPAU Driver Shared Library 470.42.01
```
If you’re using nouveau drivers configure va-api if your using proprietary drivers configure vdpau.

Check which drivers you are using

 lspci -k | grep -EA3 'VGA|3D|Display'

Look for

 Kernel driver in use: nvidia/nouveau

a. Configure va-api

 env $LIBVA_DRIVER_NAME=nouveau

b. Configure vdpau

 env $VDPAU_DRIVER=nvidia

Finally install libva-vdpau-driver-chromium or libva-vdpau-driver-vp9-git from AUR.

(to enable AUR go to add/remove software > Preferences > Third party > enable AUR. After enabling AUR I would recommend to install yay with sudo pacman -S yay)

yay -S libva-vdpau-driver-chromium
Or
yay -S libva-vdpau-driver-vp9-git

Since chrome 90+ chrome has removed support for vp9 hardware decoding so install the H264ify Chrome Extension .

To check if hardware acceleration for videos is enabled, play a youtube video and press ctrl+shift+i.

ss1

From the hamburger menu in the top right > more tools > media and see if the youtube video shows Hardware decoder = true

ss2

Thats it!