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ersatztv/ErsatzTV.Application/Streaming/Commands
timothy 757fb76151
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fix(472): review fixes — honest bucket boundaries, stale-playlist guard
From the cold adversarial review of the initial diff. No blockers were
found; these address what the numbers MEAN, which is the whole point of
an instrumentation change.

- The buckets span the worker's Run entry, not the startup stopwatch, so
  prep overlaps the tail of `setup`. Rather than let the log imply an
  invariant it does not satisfy, say "spans runEntry" in the line, spell
  it out in the doc comment, and rename the test that had codified the
  false `sum == startup` claim.
- Guard `processLaunched > playlistExists` -> Unavailable: a stale
  live.m3u8 from a previous session (Run warns about a non-empty
  transcode folder but does not delete it) would otherwise yield a
  plausible-looking sample whose prep exceeds the measured phase.
- Split the two-way fallback into TwoWay vs TwoWayLateProgress. They are
  different stories about the pipeline and discriminating stories is
  what this issue is for.
- Document the 100ms playlist-poll quantization (it lands entirely in
  firstGop, the smallest bucket) and the first-process-failed case where
  ffmpegInit spans a retry.
- Short-circuit the per-line timestamp call; static readonly Unavailable.
- Tests for the new guard, progress-before-launch, and boundary equality
  (so tightening >= to > later cannot pass silently).
2026-07-19 23:05:14 +02:00
..
2022-04-19 17:47:18 -05:00