[Tutorial]: Custom boot splash screen/animation on Chrome/Chromium OS

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 :)

how do i revert back to default

how do i upload the images having probs rn