diff --git a/arch/daedalus-v4l2/PKGBUILD b/arch/daedalus-v4l2/PKGBUILD
index c4f3d9fbe..86f2027c0 100644
--- a/arch/daedalus-v4l2/PKGBUILD
+++ b/arch/daedalus-v4l2/PKGBUILD
@@ -16,21 +16,18 @@
 pkgname=daedalus-v4l2
 _upstreampkg=daedalus-v4l2
 
-# 77e14e5 = post-revert state plus daedalus-v4l2 PRs #12 (LOW_DELAY
-# half-measure for the H.264 display-reorder visual) and #13 (daemon
-# now links daedalus-fourier and logs substrate availability at
-# startup).  Daemon now needs `daedalus-fourier` at build time —
-# Arch packaging for that sibling library is a follow-up; until it
-# lands as an AUR-style PKGBUILD, this Arch build expects
-# daedalus-fourier installed to /usr/local (or equivalent) by the
-# user.  See debian/daedalus-v4l2/build-deb.sh for the Debian-side
-# in-build fetch-and-install of daedalus-fourier.
-_commit=77e14e5a192f0eef0b41dd1140205e29d13d4d58
+# 3bc0da1 = picks up daedalus-v4l2 PR #15 — per-frame `decode_us=N`
+# in the `decoder: OK` log line + a periodic `decoder stats` summary
+# every 60 frames.  Pure observability — baseline for the
+# substitution work in daedalus-v4l2#11 step 2.  Daemon still needs
+# daedalus-fourier at build time (Arch packaging for that is a
+# follow-up; Debian side fetches inline via build-deb.sh).
+_commit=3bc0da168cc0aa2271bfb6bc2864b49c48291185
 
 # 0.1.0 (pre-1.0) + commit count + short sha.  Bump the .Y on each
 # Phase 8.x close.  pkgver() recomputes at build time.
-pkgver=0.1.0.r37.77e14e5
-pkgrel=1  # reset for new upstream pin (77e14e5 — daedalus-fourier linkage)
+pkgver=0.1.0.r39.3bc0da1
+pkgrel=1  # reset for new upstream pin (3bc0da1 — decode_us + stats)
 pkgdesc="Userspace daemon for the daedalus-v4l2 V4L2 stateless decoder shim (VP9/AV1/H.264 on Pi 5 / CM5)"
 arch=('aarch64')
 url="https://git.reauktion.de/reauktion/daedalus-v4l2"
diff --git a/debian/daedalus-v4l2/build-deb.sh b/debian/daedalus-v4l2/build-deb.sh
index 3b9cd82c8..21c54eec6 100755
--- a/debian/daedalus-v4l2/build-deb.sh
+++ b/debian/daedalus-v4l2/build-deb.sh
@@ -11,19 +11,14 @@
 # Upstream repo: https://git.reauktion.de/reauktion/daedalus-v4l2
 set -euo pipefail
 
-# 77e14e5 = post-revert state plus daedalus-v4l2 PRs #12 (LOW_DELAY
-# half-measure for the H.264 display-reorder visual) and #13 (daemon
-# now links daedalus-fourier and logs substrate availability at
-# startup).  PROTO_VERSION stays at 0; daedalus-v4l2-dkms only needs
-# bumping when the kernel module changes (no kmod changes here).
-#
-# New build-dep: daedalus-fourier kernel library.  Fetched + built +
-# installed to a per-build temp prefix below, exposed to the daemon
-# cmake via PKG_CONFIG_PATH.  Static-linked into the daemon binary,
-# so the resulting .deb has no runtime dep on daedalus-fourier.
-UPSTREAM_COMMIT=77e14e5a192f0eef0b41dd1140205e29d13d4d58
-PKGVER=0.1.0+r37+g77e14e5
-PKGREL=1  # reset for new upstream pin (77e14e5 — daedalus-fourier linkage)
+# 3bc0da1 = picks up daedalus-v4l2 PR #15 — per-frame `decode_us=N`
+# in the `decoder: OK` log line + a periodic `decoder stats` summary
+# every 60 frames (codec, fps, avg decode_us, MBs/s, B/MB).  Pure
+# observability — no behaviour change.  Baseline metrics for the
+# substitution work in daedalus-v4l2#11 step 2.
+UPSTREAM_COMMIT=3bc0da168cc0aa2271bfb6bc2864b49c48291185
+PKGVER=0.1.0+r39+g3bc0da1
+PKGREL=1  # reset for new upstream pin (3bc0da1 — decode_us + stats)
 
 # daedalus-fourier pin.  d87239d = marfrit/daedalus-fourier PR #1 merge
 # (install rules + pkg-config, enables this consumer to find_package
diff --git a/debian/daedalus-v4l2/debian/changelog b/debian/daedalus-v4l2/debian/changelog
index d2dc40d3b..f40565a9e 100644
--- a/debian/daedalus-v4l2/debian/changelog
+++ b/debian/daedalus-v4l2/debian/changelog
@@ -1,3 +1,21 @@
+daedalus-v4l2 (0.1.0+r39+g3bc0da1-1) bookworm trixie; urgency=medium
+
+  * Bump to 3bc0da1 — picks up daedalus-v4l2 PR #15.  Per-frame
+    `decoder: OK ...` log line gains `decode_us=N` (libavcodec
+    send_packet + receive_frame wall-clock cost in microseconds).
+    New `decoder stats` summary line every 60 decoded frames with
+    codec, fps, avg decode_us, MBs/s throughput, B/MB bitrate.
+  * Pure observability — no decode-path behaviour change.
+    Establishes baseline metrics for the substitution work in
+    daedalus-v4l2#11 step 2 (replacing libavcodec primitives with
+    daedalus-fourier kernels one cycle at a time).
+  * On Pi CM5 / bbb 720p H.264 baseline: ~4 ms decode_us / 24 fps
+    / 90 K MBs/s — workload is well under 1 % of any single
+    daedalus-fourier kernel's NEON ceiling.
+  * Wire protocol unchanged.  No daedalus-v4l2-dkms bump needed.
+
+ -- Markus Fritsche <mfritsche@reauktion.de>  Thu, 21 May 2026 18:30:00 +0000
+
 daedalus-v4l2 (0.1.0+r37+g77e14e5-1) bookworm trixie; urgency=medium
 
   * Bump to 77e14e5 — picks up daedalus-v4l2 PRs #12 + #13.