debian/ffmpeg-v4l2-request-fourier: new package

Mirror of arch/ffmpeg-v4l2-request-fourier into the Debian tree.
Same source pin (Kwiboo v4l2-request-n8.1 @ b57fbbe), same 2
patches (libudev-bypass-fallback + nv15-to-p010-unpack), same
configure flag policy (drop X11/AMF/CUDA/Bluray/Vulkan/SDL2/etc.
per Fourier fleet focus).

Output: single .deb at /usr/bin/ffmpeg + /usr/bin/ffprobe +
/usr/lib/aarch64-linux-gnu/libav*.so.61.  Conflicts/Replaces
the stock Debian ffmpeg + per-lib packages; takes epoch 2
(matches Debian's existing ffmpeg epoch).

Provides 'ffmpeg -hwaccel v4l2request' + '-hwaccel drm' routes
that drive rkvdec / hantro / cedrus / rpi-hevc-dec /
daedalus_v4l2 stateless decoders through libavcodec's hwdevice
DRM path, bypassing libva.  Required by mpv-fourier and
firefox-fourier as their backing FFmpeg; also the kdirect
bit-exact reference for libva-v4l2-request-fourier validation.

NOT strictly required for the VAAPI-only path on
daedalus-v4l2 hosts (stock Debian ffmpeg + libva-v4l2-request-
fourier covers that).  Install only when going firefox-fourier
or kdirect.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

debian/ffmpeg-v4l2-request-fourier/debian/changelog

@@ -0,0 +1,14 @@
+ffmpeg-v4l2-request-fourier (2:8.1+rfourier+gb57fbbe-1) bookworm trixie; urgency=medium
+
+  * Initial Debian packaging for the Kwiboo FFmpeg fork with V4L2
+    Request API hwaccel patches.
+  * Mirror of arch/ffmpeg-v4l2-request-fourier (same pin b57fbbe,
+    same configure flags, same 2 patches: libudev-bypass-fallback +
+    nv15-to-p010-unpack).
+  * Drop-in replacement for Debian's stock ffmpeg + libav*; takes
+    epoch 2 to win the apt version comparison.
+  * Required by mpv-fourier and firefox-fourier; not strictly
+    required for the VAAPI-only path on daedalus-v4l2 hosts (stock
+    libva + Debian ffmpeg works there).
+
+ -- Markus Fritsche <mfritsche@reauktion.de>  Mon, 18 May 2026 23:00:00 +0000