Built with ffmpeg 8, libaom 3.13, x265 4.1, glibc 2.43 and clang 21,
five lanes failed on the 26.04 runners:
- AV1 fixtures: a monochrome sequence comes out full range with no
matrix whatever is asked for; the oracle takes the colour ffprobe
reads instead of assuming it.
- Preview audio oracle: ffmpeg 8 leaves a timestamp gap at every seam
of a -stream_loop copy, which the mixer honours and ffmpeg's raw
decode does not. trailing_large loops its picture and encodes its
sound as one track.
- rh265 multi-slice oracle: x265 4.1 writes unreadable slice headers
when two slices are encoded on several threads; those cases encode
on one worker.
- vkms: the kernel follows the runner's own release, its modules may
sit under /usr/lib/modules, and modules-extra is fetched only where
it exists.
- clang -std=c89 -pedantic: glibc's const-generic strchr/strstr under
_GNU_SOURCE are _Generic; -Wno-c11-extensions goes wherever
-Wno-c99-extensions already does.
ci_paths filters a file at the top of a samples tree by its own path.
rh264 and rh265 lose the parameters no instantiation reads, the 8-bit
H.264 kernels mark the depth they ignore, and the AV1 WebM fixtures
leave out the MP4 box writer they never use.