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index.js
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index.js
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var fs = require('fs');
var iconv = require('iconv-lite');
var charsetDetect = require('jschardet');
var captions = require('node-captions');
module.exports = {
transform: function(srtPath) {
vttPath = srtPath.replace('.srt', '.vtt');
srtData = fs.readFileSync(srtPath);
decode(srtData, function (srtDecodedData) {
captions.srt.parse(srtDecodedData, function (err, vttData) {
if (err) {
return cb(err, null);
}
// Overwrite srt with UTF-8 encoding
fs.writeFile(srtPath, srtDecodedData, 'utf8');
// Save vtt as UTF-8 encoded, so that foreign subs will be shown correctly on ext. devices.
fs.writeFile(vttPath, captions.vtt.generate(captions.srt.toJSON(vttData)), 'utf8', function (err) {
if (err) {
return cb(err, null);
} else {
return {
vtt: vttPath,
srt: srtPath,
encoding: 'utf8'
};
}
});
});
});
},
decode: function(dataBuff, callback) {
var targetEncodingCharset = 'utf8';
var charset = charsetDetect.detect(dataBuff);
var detectedEncoding = charset.encoding;
dataBuff = iconv.encode(iconv.decode(dataBuff, detectedEncoding), targetEncodingCharset);
callback(dataBuff.toString('utf8'));
}
};