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Last active January 7, 2022 22:07
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A script that fetches a ChromeOS image for ARM32 and extracts the Widevine and Flash binaries, saving them in a compressed archive for use with Chromium for DRM

The included script '' fetches a ChromeOS image for ARM and extracts the Widevine and Flash binaries, saving them in a compressed archive. Since it downloads a fairly large file (2Gb+ on disk after download) it is recommended that you run the script on a raspberry that has plenty of disk space.

The files in the compressed archive are copied to the folder /usr/lib/chromium-browser/ To run the file just type the following:

sudo ./

Check out this tutorial:

#!/bin/sh -eu
# Make sure we have wget or curl
available () {
command -v "$1" >/dev/null 2>&1
if available wget; then
DL="wget -O-"
DL_SL="wget -qO-"
elif available curl; then
DL="curl -L"
DL_SL="curl -s"
echo "Install Wget or cURL" >&2
exit 1
# Find a URL to a suitable armhf ChromeOS recovery image
CHROMEOS_URL="$($DL_SL | grep -A11 CB5-312T | sed -n 's/^url=//p')"
CHROMEOS_IMG="$(basename "$CHROMEOS_URL" .zip)"
if [ -e "$CHROMEOS_IMG" ]; then
# Fetch the recovery image (2Gb+ on disk after download)
# Note the next free loop device in a variable
LOOPD="$(losetup -f)"
# If root, we can mount silently (no popup windows after mount)
if [ "$USER" = "root" ]; then
MNTPNT="$(mktemp -d -t ChromeOS.XXXXXX)"
mount -o ro "${LOOPD}p3" "$MNTPNT"
# Associate all the partitions on the disk image with loop devices:
udisksctl loop-setup -rf "$CHROMEOS_IMG_PATH/$CHROMEOS_IMG"
sleep 1
# Mount the third partition of the disk image (if the previous did not do it automatically)
if ! lsblk -lo MOUNTPOINT "${LOOPD}p3" | tail -n1 | grep -q \.; then
udisksctl mount -b "${LOOPD}p3"
# Note the mount point in a variable
MNTPNT="$(lsblk -lo MOUNTPOINT "${LOOPD}p3" | tail -n1)"
# Copy over files and make manifest
CHRFILES="$(mktemp -d -t ChromeOS_Files.XXXXXX)"
install -Dm644 "$MNTPNT"/opt/google/chrome/pepper/ "$CHRFILES"/
install -Dm644 "$MNTPNT"/opt/google/chrome/ "$CHRFILES"/
WVVER="$(grep -Eaom1 '([0-9]+\.){3}[0-9]+' "$CHRFILES"/"
WVMGR="$(echo $WVVER | cut -d. -f1)"
WVMIN="$(echo $WVVER | cut -d. -f2)"
echo "{\"version\":\"$WVVER\",\"x-cdm-codecs\":\"vp8,vp9.0,avc1,av01\",\"x-cdm-host-versions\":\"$WVMIN\",\"x-cdm-interface-versions\":\"$WVMIN\",\"x-cdm-module-versions\":\"$WVMGR\"}" > "$CHRFILES"/manifest.json
# Extract the libs out and copy them to a compressed tar archive
ARCHIVE_NAME="widevine-flash-$(date '+%Y%m%d')_armhf.tgz"
echo "Extracting and compressing files"
chmod 755 "$CHRFILES"/
chmod 755 "$CHRFILES"/
tar -C"$CHRFILES" -caf "$ARCHIVE_NAME" manifest.json --format ustar --owner 0 --group 0
rm -r "$CHRFILES"
echo "Created: $ARCHIVE_NAME"
# Cleanup
if [ "$USER" = "root" ]; then
umount "$MNTPNT"
losetup -d "$LOOPD"
rmdir "$MNTPNT"
ALLMNTS="$(lsblk -lo NAME,MOUNTPOINT "$LOOPD" | sed -n '/\//s/^\(loop[0-9]\+p[0-9]\+\).*/\1/p')"
echo "$ALLMNTS" | xargs -I{} -n1 udisksctl unmount -b /dev/{}
if [ "$LOOPD" != "$(losetup -f)" ]; then
udisksctl loop-delete -b "$LOOPD"
if [ "$DEL_IMG" = "N" ] || [ "${1:-EMPTY}" = "-k" ]; then
# Installing DRM support
echo "Installing DRM support for Chromium"
# check for the last version of the browsers
USER_AGENT='--user-agent="Mozilla/5.0 (X11; CrOS armv7l 13099.85.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.110 Safari/537.36"'
mkdir -p ${HOME}/.config/chromium-browser/WidevineCdm
sudo mkdir -p /opt/WidevineCdm/_platform_specific/linux_arm
echo '{"Path":"/opt/WidevineCdm"}' > ${HOME}/.config/chromium-browser/WidevineCdm/latest-component-updated-widevine-cdm
sudo mv manifest.json /opt/WidevineCdm
sudo mv /opt/WidevineCdm/_platform_specific/linux_arm
sudo mv /usr/lib/chromium-browser/
# Changing user-agent to Chromium
cp /usr/share/applications/chromium-browser.desktop .
sed 's/Chromium/Chromium (DRM)/g' chromium-browser.desktop > chromium-drm-browser.desktop
sed -i 's@Exec=chromium-browser %U@'"Exec=chromium-browser %U $USER_AGENT"'@' chromium-drm-browser.desktop
sed -i 's@Exec=chromium-browser@'"Exec=chromium-browser $USER_AGENT"'@' chromium-drm-browser.desktop
sed -i 's@Exec=chromium-browser --temp-profile@'"Exec=chromium-browser --temp-profile $USER_AGENT"'@' chromium-drm-browser.desktop
sed -i 's@Exec=chromium-browser --incognito@'"Exec=chromium-browser --incognito $USER_AGENT"'@' chromium-drm-browser.desktop
sudo mv chromium-drm-browser.desktop /usr/share/applications/
# Clean up installation
#rm chromium-browser.desktop
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rowen77 commented Jul 5, 2020

Got this working on a Pi4 8GB now able to watch the Formula 1 coverage on Channel 4 in the UK.
Thank you. 🙏

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edurenye commented Oct 1, 2020

Hi, I tried on a Raspberry Pi 4 with Raspberry Pi OS 64bit, and it does not work, I had to adapt it a bit forking your repo (see:, but I just got to fix the USER-AGENT, when I go to chrome://components in the browser I do not see the 'Widevine Content Decryption Module' component. It is in the folder, but Chromium does not load it.

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I've removed the file for OS 64bit. You can change the --user-agent using the extension Custom User Agent String. But, I checked that the User ABI for all Chromium-OS is 32 bits (arm) (check out here), and the libraries don't load on Raspberry OS because the User ABI is 64bits. You'll get the following error: wrong ELF class: ELFCLASS32. I thought the information on the website wasn't correct and I checked 3 different images and I got the same error.

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Can't we get it from Ubuntu instead? It supports arm64.
Or from Android maybe?

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Chromium per default doesn't include support for DRM (neither under Ubuntu). That means, you need Chrome, not Chromium and that's not available.

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I see 😞
And can't we get it from Android? In Android, Chrome is compiled for arm64, right?
But I guess might be difficult to get that from an apk.

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