How to use prism-media - 10 common examples
To help you get started, we’ve selected a few prism-media examples, based on popular ways it is used in public projects.
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amishshah / ytdl-core-discord / index.js View on Github 
ytdl.getInfo(url, (err, info) => {
if (err) return reject(err);
// Prefer opus
const format = info.formats.find(filter);
const canDemux = format && info.length_seconds != 0;
if (canDemux) options = { ...options, filter };
else if (info.length_seconds != 0) options = { ...options, filter: 'audioonly' };
if (canDemux) {
const demuxer = new prism.opus.WebmDemuxer();
return resolve(ytdl.downloadFromInfo(info, options).pipe(demuxer).on('end', () => demuxer.destroy()));
} else {
const transcoder = new prism.FFmpeg({
args: [
'-reconnect', '1',
'-reconnect_streamed', '1',
'-reconnect_delay_max', '5',
'-i', nextBestFormat(info.formats).url,
'-analyzeduration', '0',
'-loglevel', '0',
'-f', 's16le',
'-ar', '48000',
'-ac', '2',
],
});
const opus = new prism.opus.Encoder({ rate: 48000, channels: 2, frameSize: 960 });var resample = new samplerate({
// Value can be from 0 to 4 or using enum. 0 is the best quality and the slowest.
type: samplerate.SRC_SINC_MEDIUM_QUALITY,
// Stereo
channels: 1,
// Sample rate of source
fromRate: 22050,
// bit depth of source. Valid values: 16 or 32
fromDepth: 16,
// Desired sample rate
toRate: 48000,
// Desired bit depth. Valid values: 16 or 32
toDepth: 16
});
callback(null, audioStream.pipe(ld).pipe(resample).pipe(new prism.opus.Encoder({rate: 48000, channels: 1, frameSize: 960 })));
}
catch(ex)
{
callback(ex, null);
}
});
}var resample = new samplerate({
// Value can be from 0 to 4 or using enum. 0 is the best quality and the slowest.
type: samplerate.SRC_SINC_MEDIUM_QUALITY,
// Stereo
channels: 1,
// Sample rate of source
fromRate: 24000,
// bit depth of source. Valid values: 16 or 32
fromDepth: 16,
// Desired sample rate
toRate: 48000,
// Desired bit depth. Valid values: 16 or 32
toDepth: 16
});
callback(null, p.pipe(ld).pipe(resample).pipe(new prism.opus.Encoder({rate: 48000, channels: 1, frameSize: 960 })));
}
else {
Common.error(response);
callback(new Error('HTTP ERROR: ' + response.statusCode));
}
})
.on('error', err => callback(err));ytdl.getInfo(url, (err, info) => {
if (err) return reject(err);
// Prefer opus
const format = info.formats.find(filter);
const canDemux = format && info.length_seconds != 0;
if (canDemux) options = { ...options, filter };
else if (info.length_seconds != 0) options = { ...options, filter: 'audioonly' };
if (canDemux) {
const demuxer = new prism.opus.WebmDemuxer();
return resolve(ytdl.downloadFromInfo(info, options).pipe(demuxer).on('end', () => demuxer.destroy()));
} else {
const transcoder = new prism.FFmpeg({
args: [
'-reconnect', '1',
'-reconnect_streamed', '1',
'-reconnect_delay_max', '5',
'-i', nextBestFormat(info.formats).url,
'-analyzeduration', '0',
'-loglevel', '0',
'-f', 's16le',
'-ar', '48000',
'-ac', '2',
],
});
const opus = new prism.opus.Encoder({ rate: 48000, channels: 2, frameSize: 960 });
const stream = transcoder.pipe(opus);
stream.on('close', () => {
transcoder.destroy();provider.getAudioContent(request, (err, audio) => {
if ( err ) {
console.log(err);
return;
}
let decoder = new prism.opus.Decoder(48000, 1, 960);
let encoder = new lame.Encoder({
channels: 1,
bitDepth: 16,
sampleRate: 48000,
bitRate: 128,
outSampleRate: 48000,
mode: lame.STEREO
});
let stm = fs.createWriteStream(sample_file);
audio.pipe(decoder).pipe(encoder).pipe(stm);
});return this.player.playBroadcast(resource, options);
}
if (resource instanceof Readable || typeof resource === 'string') {
const type = options.type || 'unknown';
if (type === 'unknown') {
return this.player.playUnknown(resource, options);
} else if (type === 'converted') {
return this.player.playPCMStream(resource, options);
} else if (type === 'opus') {
return this.player.playOpusStream(resource, options);
} else if (type === 'ogg/opus') {
if (!(resource instanceof Readable)) throw new Error('VOICE_PRISM_DEMUXERS_NEED_STREAM');
return this.player.playOpusStream(resource.pipe(new prism.opus.OggDemuxer()), options);
} else if (type === 'webm/opus') {
if (!(resource instanceof Readable)) throw new Error('VOICE_PRISM_DEMUXERS_NEED_STREAM');
return this.player.playOpusStream(resource.pipe(new prism.opus.WebmDemuxer()), options);
}
}
throw new Error('VOICE_PLAY_INTERFACE_BAD_TYPE');
}playOpusStream(stream, options, streams = {}) {
this.destroyDispatcher();
streams.opus = stream;
if (options.volume !== false && !streams.input) {
streams.input = stream;
const decoder = new prism.opus.Decoder({ channels: 2, rate: 48000, frameSize: 960 });
streams.volume = new prism.VolumeTransformer({ type: 's16le', volume: options ? options.volume : 1 });
streams.opus = stream
.pipe(decoder)
.pipe(streams.volume)
.pipe(new prism.opus.Encoder({ channels: 2, rate: 48000, frameSize: 960 }));
}
const dispatcher = this.createDispatcher(options, streams);
streams.opus.pipe(dispatcher);
return dispatcher;
}return client.synthesizeSpeech(request, (err, response) => {
if ( !response ) return callback(err,null);
var stm = new streamifier.createReadStream(response.audioContent);
callback(err, stm.pipe(new prism.opus.OggDemuxer()));
});
}playOpusStream(stream, options, streams = {}) {
this.destroyDispatcher();
streams.opus = stream;
if (options.volume !== false && !streams.input) {
streams.input = stream;
const decoder = new prism.opus.Decoder({ channels: 2, rate: 48000, frameSize: 960 });
streams.volume = new prism.VolumeTransformer({ type: 's16le', volume: options ? options.volume : 1 });
streams.opus = stream
.pipe(decoder)
.pipe(streams.volume)
.pipe(new prism.opus.Encoder({ channels: 2, rate: 48000, frameSize: 960 }));
}
const dispatcher = this.createDispatcher(options, streams);
streams.opus.pipe(dispatcher);
return dispatcher;
}playPCMStream(stream, options, streams = {}) {
this.destroyDispatcher();
const opus = streams.opus = new prism.opus.Encoder({ channels: 2, rate: 48000, frameSize: 960 });
if (options && options.volume === false) {
stream.pipe(opus);
return this.playOpusStream(opus, options, streams);
}
streams.volume = new prism.VolumeTransformer({ type: 's16le', volume: options ? options.volume : 1 });
stream.pipe(streams.volume).pipe(opus);
return this.playOpusStream(opus, options, streams);
}prism-media
Easy-to-use stream-based media transcoding
