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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>WebCodecs VideoEncoder Dryrun</title>
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-rbsA2VBKQhggwzxH7pPCaAqO46MgnOM80zW1RWuH61DGLwZJEdK2Kadq2F9CUG65" crossorigin="anonymous">
</head>
<body>
<div class="container container-md">
<main>
<div class="py-5 text-center">
<h1>VideoEncoder Configuration</h1>
</div>
<div class="row">
<div class="col">
<div class="input-group mb-3">
<label for="h264_profile" class="input-group-text">H.264 profile</label>
<select id="h264_profile" name="h264_profile" class="form-select">
<option value="baseline" selected>baseline</option>
<option value="constrained_baseline">constrained baseline</option>
<option value="main">main</option>
<option value="high">high</option>
</select>
</div>
</div>
<div class="col">
<div class="input-group mb-3">
<label for="h264_level" class="input-group-text" >H.264 level</label>
<select id="h264_level" name="h264_level" class="form-select">
<option value="10">1.0</option>
<option value="11">1.1</option>
<option value="12">1.2</option>
<option value="13">1.3</option>
<option value="20">2.0</option>
<option value="21">2.1</option>
<option value="22">2.2</option>
<option value="30">3.0</option>
<option value="31">3.1</option>
<option value="32">3.2</option>
<option value="40">4.0</option>
<option value="41">4.1</option>
<option value="42">4.2</option>
<option value="50">5.0</option>
<option value="51">5.1</option>
<option value="52" selected>5.2</option>
<option value="60">6.0</option>
<option value="61">6.1</option>
<option value="62">6.2</option>
</select>
</div>
</div>
<div class="col">
<div class="input-group mb-3">
<label for="framerate" class="input-group-text">Encoding framerate</label>
<select id="framerate" name="framerate" class="form-select">
<option value="30" selected>30</option>
<option value="60">60</option>
</select>
</div>
</div>
</div>
<div class="row">
<div class="col">
<div class="input-group mb-3">
<label for="codec" class="input-group-text" >Codec string</label>
<input class="form-control" id="codec" name="codec" type="text" disabled>
</div>
</div>
</div>
<div class="row">
<div class="col">
<div class="input-group mb-3">
<label for="resolution" class="input-group-text">Encoding resolution</label>
<select id="resolution" name="resolution" class="form-select">
<option value="480p">480p (852x480)</option>
<option value="720p">720p (1280x720)</option>
<option value="1080p" selected>1080p (1920x1080)</option>
<option value="1440p">1440p (2560x1440)</option>
<option value="4K">4K (3840x2160)</option>
</select>
</div>
</div>
<div class="col">
<div class="input-group mb-3">
<label for="bitrate" class="input-group-text">Bitrate</label>
<input type="number" name="bitrate" id="bitrate" step="1" value="2000000" class="form-control">
</div>
</div>
<div class="col">
<div class="input-group mb-3">
<label for="bitrate_mode" class="input-group-text">Bitrate mode</label>
<select id="bitrate_mode" name="bitrate_mode" class="form-select">
<option value="variable" selected>variable</option>
<option value="constant">constant</option>
</select>
</div>
</div>
</div>
<div class="row">
<div class="col">
<div class="input-group mb-3">
<label for="nalu_format" class="input-group-text">H.264 NALU format</label>
<select id="nalu_format" name="nalu_format" class="form-select">
<option value="annexb" selected>annexb</option>
<option value="avc">avc</option>
</select>
</div>
</div>
<div class="col">
<div class="input-group mb-3">
<label for="hardware_acceleration" class="input-group-text">Hardware acceleration</label>
<select id="hardware_acceleration" name="hardware_acceleration" class="form-select">
<option value="prefer-hardware" selected>prefer-hardware</option>
<option value="prefer-software">prefer-software</option>
<option value="no-preference">no-preference</option>
</select>
</div>
</div>
<div class="col">
<div class="input-group mb-3">
<label for="frame_representation" class="input-group-text">Frame representation</label>
<select id="frame_representation" name="frame_representation" class="form-select">
<option value="cpu" selected>Main memory (YUV420p)</option>
<option value="gpu">GPU memory (WebGL texture)</option>
</select>
</div>
</div>
</div>
<div class="row">
<div class="col">
<div class="input-group mb-3">
<label for="alpha_option" class="input-group-text">Alpha option</label>
<select id="alpha_option" name="alpha_option" class="form-select">
<option value="discard" selected>discard</option>
<option value="keep">keep</option>
</select>
</div>
</div>
<div class="col">
<div class="input-group mb-3">
<label for="latency_mode" class="input-group-text">Latency mode</label>
<select id="latency_mode" name="latency_mode" class="form-select">
<option value="quality" selected>quality</option>
<option value="realtime">realtime</option>
</select>
</div>
</div>
</div>
<div class="row">
<div class="col">
<label for="config_supported" class="form-label">Video encoder configuration supported:</label>
<textarea name="config_supported" id="config_supported" rows="20" cols="80" class="form-control" disabled></textarea>
</div>
</div>
<hr class="my-4">
<button id="run" class="w-100 btn btn-primary" disabled>Exercise encoder</button>
<div class="row">
<div class="col">
<label for="dryrun_encoder" class="form-label">Encoder dryrun output:</label>
<textarea name="dryrun_encoder" id="dryrun_encoder" rows="20" cols="80" class="form-control" disabled></textarea>
</div>
</div>
</main>
</div>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-kenU1KFdBIe4zVF0s0G1M5b4hcpxyD9F7jL+jjXkk+Q2h455rYXK/7HAuoJl+0I4" crossorigin="anonymous"></script>
<script src="https://code.jquery.com/jquery-3.6.1.min.js" integrity="sha256-o88AwQnZB+VDvE9tvIXrMQaPlFFSUTR+nldQm1LuPXQ=" crossorigin="anonymous"></script>
<script>
const H264_PROFILES = {
'baseline': 66,
'constrained_baseline': 66,
'main': 77,
'high': 100
};
const ENCODING_DIMENSIONS = {
'480p': { width: 852, height: 480 },
'720p': { width: 1280, height: 720 },
'1080p': { width: 1920, height: 1080 },
'1440p': { width: 2560, height: 1440 },
'4K': { width: 3840, height: 2160 }
};
const DRYRUN_NUM_FRAMES = 100;
const MAX_ENCODE_QUEUE_SIZE = 3;
const worker = new Worker('./worker.js?cachebust=' + Math.random());
function log(selector, line) {
$(selector).val(`${$('textarea#dryrun_encoder').val()}\n${line}`);
}
function error(selector, line) {
$(selector).val(`${$('textarea#dryrun_encoder').val()}\n\n------- !!! Error !!! -------\n${line}\n-----------------------------\n`);
}
function logDryrun(line) {
log('textarea#dryrun_encoder', line);
}
function errorDryrun(line) {
error('textarea#dryrun_encoder', line)
}
function logConfig(line) {
log('textarea#config_supported', line);
}
function errorConfig(line) {
error('textarea#config_supported', line)
}
function getUserConfiguration() {
return {
codec: $('input#codec').val(),
...ENCODING_DIMENSIONS[$('select#resolution').val()],
bitrate: parseInt($('input#bitrate').val()),
framerate: parseInt($('select#framerate').val()),
hardwareAcceleration: $('select#hardware_acceleration').val(),
alpha: $('select#alpha_option').val(),
bitrateMode: $('select#bitrate_mode').val(),
latencyMode: $('select#latency_mode').val(),
avc: {
format: $('select#nalu_format').val(),
}
};
}
function send(topic, payload) {
worker.postMessage({
topic,
direction: 'request',
payload
});
}
function isConfigSupported() {
const userConfig = getUserConfiguration();
$('textarea#config_supported').val('');
$('textarea#dryrun_encoder').val('');
$('button#run').attr('disabled', 'disabled');
worker.onmessage = event => {
if (event.data.direction === 'response') {
switch(event.data.topic) {
case 'log':
if (event.data.payload.severity === 'info') {
logConfig(event.data.payload.line);
} else {
errorConfig(event.data.payload.line);
}
break;
case 'error':
errorConfig(`Encoder configuration is NOT supported, the probed user configuration was:\n${JSON.stringify(userConfig, null, 3)}`);
break;
case 'done':
$('button#run').removeAttr('disabled');
logConfig(`Encoder configuration is supported:\n${JSON.stringify(userConfig, null, 3)}\nThe returned (pruned) configuration is:\n${JSON.stringify(event.data.payload.config, null, 3)}`);
break;
default:
errorConfig('Worker sent invalid message: ' + event.data);
}
}
};
send('support', {
userConfig,
});
}
$('select#framerate').change(isConfigSupported);
$('select#resolution').change(isConfigSupported);
$('input#bitrate').change(isConfigSupported);
$('select#bitrate_mode').change(isConfigSupported);
$('select#hardware_acceleration').change(isConfigSupported);
$('select#alpha_option').change(isConfigSupported);
$('select#latency_mode').change(isConfigSupported);
$('select#nalu_format').change(isConfigSupported);
function updateCodecString() {
const profile = $('select#h264_profile').val();
const level = parseInt($('select#h264_level').val());
const codec = `avc1.${H264_PROFILES[profile].toString(16).padStart(2, '0')}${profile === 'constrained_baseline' ? 'e0' : '00'}${level.toString(16).padStart(2, '0')}`;
$('input#codec').val(codec);
isConfigSupported();
}
$('select#h264_profile').change(updateCodecString);
$('select#h264_level').change(updateCodecString);
// Pre-fill codec string with default selection of H.264 profile and level form fields (triggers a check whether the resulting VideoEncoderConfig is supported).
updateCodecString();
function exerciseEncoder() {
return new Promise((resolve, reject) => {
worker.onmessage = event => {
if (event.data.direction === 'response') {
switch(event.data.topic) {
case 'log':
if (event.data.payload.severity === 'info') {
logDryrun(event.data.payload.line);
} else {
errorDryrun(event.data.payload.line);
}
break;
case 'error':
reject(new Error(event.data.payload.message));
break;
case 'done':
resolve();
break;
default:
errorDryrun('Worker sent invalid message: ' + event.data);
}
}
};
send('start', {
userConfig: getUserConfiguration(),
useWebGl: $('select#frame_representation').val() === 'gpu',
});
});
}
$('button#run').click(async () => {
$('button#run').attr('disabled', 'disabled');
try {
await exerciseEncoder();
} catch (error) {
errorDryrun('An error occurred during the encoder dry-run: ' + error);
} finally {
$('button#run').removeAttr('disabled');
}
});
</script>
</body>
</html>