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Fix VCR scrubber: limit replay to 50 packets from scrub point

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Root cause: scrub replay was playing through the ENTIRE buffer
from scrub point to end (thousands of packets), racing the playhead
forward to now. Now caps replay at 50 packets from scrub point,
then pauses. Hit LIVE to resume real-time.
This commit is contained in:
you
2026-03-19 07:02:42 +00:00
parent 43bd3d07c2
commit 92d66ea4d1
1 changed files with 7 additions and 2 deletions
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public/live.js
+7 -2
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@@ -86,6 +86,8 @@
VCR.playhead = -1;
VCR.speed = 1;
VCR.missedCount = 0;
VCR.scrubEnd = null;
VCR.dragPct = null;
vcrSetMode('LIVE');
const prompt = document.getElementById('vcrPrompt');
if (prompt) prompt.classList.add('hidden');
@@ -161,8 +163,9 @@
stopReplay();
function tick() {
if (VCR.mode !== 'REPLAY') return;
if (VCR.playhead >= VCR.buffer.length) {
// Caught up — pause instead of auto-resuming live
const endIdx = VCR.scrubEnd != null ? VCR.scrubEnd : VCR.buffer.length;
if (VCR.playhead >= endIdx) {
VCR.scrubEnd = null;
vcrSetMode('PAUSED');
return;
}
@@ -613,6 +616,8 @@
if (dist < minDist) { minDist = dist; closest = i; }
});
VCR.playhead = closest;
// Only replay ~50 packets from scrub point, not entire buffer to end
VCR.scrubEnd = Math.min(closest + 50, VCR.buffer.length);
startReplay();
})
.catch(() => {});