VideoAdvisors

Pure playback advisors ported from the extension: silence map, speaker pace, resume snapping, quiet listening, deep-link QR

Silence map (smart speed)

A 10-minute synthetic envelope, 1s bins: speech for 30s, silence for 12s, repeating. The advisor finds the gaps, qualifies them (≥0.35s after merging), pads them 0.08s inside, and reports the honest saving measured off the lead-trimmed windows — the number the UI may promise, never the naive covered × boost.

Gaps found

Covered

0.0s

Honest saving @ 2.2×

boostAt(45s)

1×

Speaker pace (measured, not guessed)

WPM per speaker from whitespace-tokenised words over talk time, attributed at each segment's midpoint; ad reads are known and never attributed to a person. Rates even everyone out toward the talk-time-weighted median — anyone within ±7% is left exactly alone. The component's rate composer multiplies these; the advisor never writes playbackRate.

Ben 180 wpm · on pace
Ana 150 wpm → 1.2x
median: 180 wpm (talk-time weighted)

Resume at a sentence, never at a second

A stored 1000.0s snaps back to the nearest real boundary within 15s — closest wins, ties go to the more specific boundary. The label quotes the words you're walking back into; it never paraphrases.

stored: 1000.0s → snapped to 998s (sentence)

“picking up where Ana was saying “Now, if you look at the””

resumeLabel alone: “”

Quiet listening — how much, at each volume

amountFor rises as volume falls (smoothstep under the 0.35 knee) and holds a 0.35 floor after dark. The tone graph itself is createQuietChain — mos-5lzns.31 splices it into the audio graph; this module owns tone, never level.

volume	day	night floor
0	1.00	1.00
0.1	0.80	0.80
0.2	0.39	0.39
0.3	0.06	0.35
0.35	0.00	0.35
0.5	0.00	0.35
0.8	0.00	0.35
1	0.00	0.35

Deep-link QR (continue on phone)

qrMatrix encodes the deep link — versions 1–10, byte mode, all four ECC levels, zero dependencies, and the whole spec in readable source. qrCanvas renders it (in a browser; the demo shows the matrix the canvas would paint). Options degrade to defaults; unrepresentable text throws, because a QR that scans to a truncated URL is the one failure you can't take back.

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37×37 modules (v5) for 68 bytes

The advisor doctrine

A disabled feature leaves no trace in the signal.
Nothing acts without something the user can see.
Measuring code is an advisor; the component decides and applies.
Every function returns a safe neutral value instead of throwing on malformed input — the QR capacity error is the one deliberate exception, because a plausible wrong URL is worse than a loud failure.