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fix(video): make one-frame scene sampling deterministic

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Diego Rodrigues de Sa e Souza
2026-08-24 02:19:22 -03:00
parent dafb4ae808
commit 79fa6befa0
5 changed files with 257 additions and 1 deletions
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docs/security/GUARDRAILS.md
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@@ -328,7 +328,10 @@ fixed FFmpeg pass over the already validated local stream, select bounded
uniform midpoints on detector failure, timeout, malformed output, or an empty
candidate set. Segment-aware mode allocates midpoint samples proportionally to
the validated scene intervals. The hard 16-frame cap is
applied after selection in every policy. A caller may optionally provide a
applied after selection in every policy. When a scene-aware request has only a
one-frame budget, it uses the uniform midpoint of the active full-video or focus
window and reports `policyEffective: uniform`: a single selected scene frame
cannot preserve both temporal ends. A caller may optionally provide a
finite focus window (`start`/`end` seconds); bounds are clamped to the media
duration, reversed or non-finite windows are rejected, and all sampling
policies are performed only inside the normalized interval. The resulting