Created
March 23, 2019 00:35
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Media audio availability test
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Title</title> | |
| <!--<script src="https://unpkg.com/wavesurfer.js"></script>--> | |
| </head> | |
| <body> | |
| <video id="video" | |
| crossorigin="anonymous" | |
| src="https://fxp-1258505122.cos.ap-chengdu.myqcloud.com/73ec045e66dc8f6a3ad8049deec08c40_norm.mp4"></video> | |
| <div id="waveform"></div> | |
| <button data-playing="false" role="switch" aria-checked="false" onclick="play()"> | |
| <span>Play/Pause</span> | |
| </button> | |
| <script> | |
| var audioContext = undefined; | |
| let analyser = undefined; | |
| let mediaElt = undefined; | |
| function initAudioContext() { | |
| audioContext = new (window.AudioContext || window.webkitAudioContext)(); | |
| analyser = audioContext.createAnalyser(); | |
| audioContext.crossOrigin = "anonymous"; | |
| mediaElt = document.querySelector('video'); | |
| let source = audioContext.createMediaElementSource(mediaElt); | |
| source.connect(analyser); | |
| } | |
| function play() { | |
| if (!audioContext) { | |
| initAudioContext(); | |
| } | |
| // track.connect(audioContext.destination); | |
| mediaElt.play(); | |
| let badAudio = true; | |
| let checker = setInterval(() => { | |
| let dataArray = new Uint8Array(analyser.fftSize); | |
| analyser.getByteTimeDomainData(dataArray); | |
| for (let d of dataArray) { | |
| if (d != 128) { | |
| badAudio = false | |
| clearInterval(checker); | |
| clearTimeout(timeoutChecker); | |
| break; | |
| } | |
| } | |
| }, 100) | |
| function onVideoEnd() { | |
| console.log('result1', badAudio); | |
| clearInterval(checker); | |
| clearTimeout(timeoutChecker); | |
| mediaElt.removeEventListener('ended', onVideoEnd); | |
| } | |
| mediaElt.addEventListener('ended', onVideoEnd) | |
| let timeoutChecker = setTimeout(_ => { | |
| console.log('result2', badAudio); | |
| mediaElt.pause(); | |
| clearInterval(checker); | |
| clearTimeout(timeoutChecker); | |
| mediaElt.removeEventListener('ended', onVideoEnd); | |
| }, 8000); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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