2077866.html - mozsearch

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<!DOCTYPE html>

<html class="reftest-wait">

<head><meta charset="utf-8"></head>

<body>

<script>

// Frame dimensions that are not a multiple of 8 leave 4x4 transform blocks

// entirely outside the visible frame in libaom's 8-aligned mode info grid.

const SIZES = [[100, 100], [68, 36], [36, 68]];

function noisyFrame(width, height, timestamp) {

  const cw = (width + 1) >> 1, ch = (height + 1) >> 1;

  const data = new Uint8Array(width * height + 2 * cw * ch);

  let seed = timestamp + 1;

  for (let i = 0; i < data.length; i++) {

    seed = (seed * 1103515245 + 12345) & 0x7fffffff;

    data[i] = seed >> 23;

  return new VideoFrame(data, {

    format: "I420",

    codedWidth: width,

    codedHeight: height,

    timestamp,

});

async function encode(width, height) {

  const config = { codec: "av01.0.04M.08", width, height, bitrate: 1000000 };

  const { supported } = await VideoEncoder.isConfigSupported(config);

  if (!supported) {

    return;

  const encoder = new VideoEncoder({ output: () => {}, error: () => {} });

  encoder.configure(config);

  for (let i = 0; i < 4; i++) {

    const frame = noisyFrame(width, height, i * 33333);

    encoder.encode(frame, { keyFrame: i == 0 });

    frame.close();

  await encoder.flush();

  encoder.close();

async function run() {

  for (const [w, h] of SIZES) {

    try {

      await encode(w, h);

    } catch (e) {}

run().finally(() => { document.documentElement.className = ""; });

</script>

</body>

</html>