AudioConfiguration

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AudioConfiguration dictionary of the 媒体能力 API defines the audio file being tested when calling MediaCapabilities.encodingInfo() or MediaCapabilities.decodingInfo() to query whether a specific audio configuration is supported, smooth, and/or power efficient.

特性

AudioConfiguration dictionary is made up of four audio properties, including:

contentType : A valid audio MIME type, For information on possible values and what they mean, see the web audio codec guide .
channels : the number of channels used by the audio track.
bitrate : The number of bits used to encode one second of the audio file.
samplerate : The number of audio samples making up one second of the audio file.

范例

//Create media configuration to be tested
const mediaConfig = {
    type : 'file', // 'record', 'transmission', or 'media-source'
    audio : {
        contentType : "audio/ogg", // valid content type
        channels : 2,     // audio channels used by the track
        bitrate : 132700, // number of bits used to encode 1s of audio
        samplerate : 5200 // number of audio samples making up that 1s.
     }
};
// check support and performance
navigator.mediaCapabilities.decodingInfo(mediaConfig).then(result => {
    console.log('This configuration is ' +
        (result.supported ? '' : 'not ') + 'supported, ' +
        (result.smooth ? '' : 'not ') + 'smooth, and ' +
        (result.powerEfficient ? '' : 'not ') + 'power efficient.'
});

规范

规范	状态	注释
Media Capabilities The definition of 'AudioConfiguration' in that specification.	草案	初始定义

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

No compatibility data found. Please contribute data for "api.AudioConfiguration" (depth: 1) to the MDN 兼容性数据存储库 .

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元数据

最后修改： Oct 9, 2019

媒体能力 API
AudioConfiguration
Related pages for Media Capabilities API

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特性

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