The Phase 3 GPU-aware codec mask (e2cef91) probes VAAPI on any non-NVIDIA host.
On a GPU-less box (CI container: no /dev/nvidia* -> `auto` picks VAAPI, but there's
no VA display) the probe returns all-false, so the mask was 0 -- the host
advertised NO codecs, and the serverinfo unit test failed.
Fall back to the static superset when the probe yields nothing (VAAPI wasn't
usable, not "the GPU encodes nothing"); quiet ffmpeg's expected "No VA display"
error during the probe; and assert the test against codec_mode_support() rather
than a hardcoded 65793 so it's deterministic regardless of the build host's GPU.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
enricobuehler
68e772b662