⚠️ EXPERIMENTAL · UNSUPPORTED · USE AT YOUR OWN RISK

This is an unofficial, experimental CoreELEC 22 build. It is NOT an official
CoreELEC release and it is NOT a supported CE22 port. I am not a CoreELEC 22
port maintainer, and I will not be providing support, bug fixes, updates, or
ongoing maintenance for this build.

The only purpose of this build is to give Amlogic AM9 Pro-class users a more
complete Dolby Vision experience than stock CoreELEC 22, by carrying a set of
custom Kodi features I built for my own device. That is the entire scope.

READ THIS BEFORE YOU FLASH ANYTHING

• USE ENTIRELY AT YOUR OWN RISK. There is no warranty of any kind, express
  or implied. It may fail to boot, misbehave, break Dolby Vision, or do nothing
  useful on your hardware.
• BACK UP YOUR CURRENT INSTALLATION FIRST. Take a full CoreELEC backup
  (Settings → CoreELEC → Backup) and/or image your existing boot media before
  you install anything from here. Assume you may have to restore it.
• Prefer a SEPARATE SD card or USB stick you can boot from, instead of
  overwriting a working internal (eMMC) install.
• Do NOT report problems with this build to the CoreELEC team or forums.
  This is not their build; it is not their responsibility. Do not ask them to
  support it.
• I am also not offering support. If it breaks, you keep both pieces.

By downloading or using any file in this release you accept all of the above.

Install

• Clean install (recommended): flash the *.img.gz to an SD card or USB with
  balenaEtcher (or the Amlogic USB Burning Tool for eMMC), then boot from it.
• In-place update: copy the *.tar to the /storage/.update folder on an
  existing CoreELEC install and reboot. (Back up first — see above.)
• Verify your download against the SHA256 sums below before flashing.

What's changed in this update

This is an incremental update to
v22.0-samurihl-20260714181459
(see that release for the current feature set: VS10 on non-DV displays, the
VSVDB override fix, and the experimental tone-mapping target controls). Three
fixes, each reproduced and then verified fixed on hardware.

⚠️ Still experimental and completely unsupported — see the disclaimer above.
Back up your current install before flashing.

Dolby Vision still requires dovi.ko (the CE22 5.15 build) installed on your
device — it is not bundled; install it yourself as on stock CoreELEC 22.

🐛 Fixed

• Subtitle playback chaos from an upstream change (reverted). A recent
  upstream CoreELEC commit let subtitle packets apply global playback-clock
  corrections without confirmation from audio/video. Subtitle timestamps are
  sparse and legitimately non-monotonic — muxed tracks are demuxed ahead of the
  picture, and overlapping lines (a long on-screen sign with dialogue over it)
  look like backward jumps — so with a muxed ASS/PGS track enabled the player
  clock could be yanked around by tens of seconds: stutter or A/V desync when
  subtitles kick in or tracks are switched, and subtitle lines outstaying their
  end times. Reproduced with a synthetic overlapping-subtitle file (clock
  whipsawed +4s/−38s/+38s within 35 seconds), reverted, and re-tested clean.
  External .srt/.ass files load through a different path and were never
  affected — which is why the problem seemed to depend on the file.

• Smart CMv4.0 now explicitly no-ops on native CMv4.0 streams. Playing a
  title that already carries a studio CMv4.0 grade (common on web DV profile 5)
  flooded the debug log with per-frame "→ append" decisions. The metadata was
  never actually modified — an inner guard held — but the evaluator ran and
  logged on every frame. Native CMv4.0 is now detected up front: the whole
  append path is skipped and a single "native CMv4.0 RPU detected" line is
  logged per stream.

• Settings layout: the VS10 pickers are back where you look for them. The
  per-source "DV VS10 for X video" selectors had drifted to the very bottom of
  the CoreELEC category (below the L5 settings), where the list appears to end —
  several users assumed they were gone. They now sit directly under "Dolby
  Vision Led mode". The legacy "Tone map SDR/HDR to Dolby Vision" toggles now
  say it outright in their help text: they're the old all-or-nothing switches —
  prefer the per-source pickers, paired with the display-peak / VSVDB override,
  for better tone mapping.

🔬 Reminder: display testing still wanted

The experimental target-luminance controls from the previous release still need
eyes on real panels: sweep "VS10 target minimum luminance (reference black)"
on a 4000/10000-nit black-clip pattern via VS10 HDR10 output, compare a
profile 7 FEL title against a DV display, and watch TrueHD/Atmos A/V sync
across a full movie. Please keep the reports coming.

Install

• Clean install: flash the Generic *.img.gz (SD/USB via balenaEtcher, or the
  Amlogic USB Burning Tool for eMMC).
• Update in place: drop the *.tar in /storage/.update and reboot.
• Verify your download against the SHA256 sums below before flashing.
• On other Amlogic-no boards (Odroid / Khadas / Radxa): use the *.tar update, or
  your board's own image.

Source

• CoreELEC (distro): SamuriHL/CoreELEC tag v22.0-samurihl-20260715110713
• Kodi: SamuriHL/coreelec-xbmc tag v22.0-samurihl-20260715110713

Checksums (SHA256)

63264346c43a467113c9be81048d0432bf9aa2416ec19b76e66fdbfe2fa08bbf  CoreELEC-Amlogic-no.aarch64-22.0-Piers-samurihl-EXPERIMENTAL_20260715110713.tar
5a3e8efa661869389fdc4976b16f8145048b9b80d04c2e87fb5d7e066d33c04b  CoreELEC-Amlogic-no.aarch64-22.0-Piers-samurihl-EXPERIMENTAL_20260715110713-Generic.img.gz