supechicken/cros_custom_splash_screen.md

## cros_custom_splash_screen.md

      
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              cros_custom_splash_screen.md
            
          
    Custom boot splash screen/animation on Chrome/Chromium OS

Before you start...

^{You can find tutorials about these online}

Enable Chrome OS developer mode
Disable root filesystem verification, remount root filesystem as read/write

Steps


Pick a .gif image that you wish to be the boot splash animation
Go to https://ezgif.com/split, upload the .gif file
Select Output images in PNG format in Split options
Click Split to frames
Unzip the downloaded archive
The filename of images in archive will be look like this:

frame_00_delay-0.11s.png
frame_01_delay-0.11s.png
...snip...


Rename those images to boot_splash_frame<frame_number>.png (replace <frame_number> with the frame number listed in the filename, frame00 in the filename represent to the 1st frame, so the final name of the image will be boot_splash_frame01.png, frame01 will be boot_splash_frame02.png and so on)
Copy those images to /usr/share/chromeos-assets/images_100_percent/, cover the original boot splash images stored there
Open /etc/init/boot-splash.conf with vim (or your favourite command line text editor)
Replace all --frame-interval 25 with --frame-interval <SECONDS_LISTED_IN_FILENAME * 1000> (<SECONDS_LISTED_IN_FILENAME> is the time interval listed in each image's filename (in seconds), then convert it to milliseconds (by multipling the value with 1000))
Reboot and check out the final result :)
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