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Console log frame decoding timestamps and out-of-order errors #734

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Console log frame decoding timestamps and out-of-order errors #734

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ec92162
console log frame decoding timestamps and out-of-order errors
marcello3d Oct 30, 2023
879a0cf
Merge branch 'main' into marcello/frame-out-of-order-logging
chrisn May 13, 2025
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10 changes: 10 additions & 0 deletions samples/video-decode-display/worker.js
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Original file line number Diff line number Diff line change
Expand Up @@ -58,6 +58,8 @@ function start({dataUri, rendererName, canvas}) {
break;
}

let lastTimestamp = -Infinity;

// Set up a VideoDecoder.
const decoder = new VideoDecoder({
output(frame) {
Expand All @@ -70,6 +72,14 @@ function start({dataUri, rendererName, canvas}) {
setStatus("render", `${fps.toFixed(0)} fps`);
}

if (frame.timestamp < lastTimestamp) {
console.error(`Decoded frame ${frame.timestamp} µs out of order, last frame was ${lastTimestamp} µs`);
} else {
console.log(`Decoded frame ${frame.timestamp} µs`);
}

lastTimestamp = frame.timestamp;

// Schedule the frame to be rendered.
renderFrame(frame);
},
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