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Runtime error
File size: 1,711 Bytes
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media_codecs = """
/**
* Input might look funky, we need to normalize it so e.g. whitespace isn't an issue for our spoofing.
*
* @example
* video/webm; codecs="vp8, vorbis"
* video/mp4; codecs="avc1.42E01E"
* audio/x-m4a;
* audio/ogg; codecs="vorbis"
* @param {String} arg
*/
const parseInput = arg => {
const [mime, codecStr] = arg.trim().split(';')
let codecs = []
if (codecStr && codecStr.includes('codecs="')) {
codecs = codecStr
.trim()
.replace(`codecs="`, '')
.replace(`"`, '')
.trim()
.split(',')
.filter(x => !!x)
.map(x => x.trim())
}
return {
mime,
codecStr,
codecs
}
}
const canPlayType = {
// Intercept certain requests
apply: function (target, ctx, args) {
if (!args || !args.length) {
return target.apply(ctx, args)
}
const {mime, codecs} = parseInput(args[0])
// This specific mp4 codec is missing in Chromium
if (mime === 'video/mp4') {
if (codecs.includes('avc1.42E01E')) {
return 'probably'
}
}
// This mimetype is only supported if no codecs are specified
if (mime === 'audio/x-m4a' && !codecs.length) {
return 'maybe'
}
// This mimetype is only supported if no codecs are specified
if (mime === 'audio/aac' && !codecs.length) {
return 'probably'
}
// Everything else as usual
return target.apply(ctx, args)
}
}
/* global HTMLMediaElement */
utils.replaceWithProxy(
HTMLMediaElement.prototype,
'canPlayType',
canPlayType
)
"""
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