Preview seek: optional hours and ms in VTT parser
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@ -17,17 +17,17 @@ const parseVtt = vttDataString => {
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if (!is.number(result.startTime)) {
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if (!is.number(result.startTime)) {
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// The line with start and end times on it is the first line of interest
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// The line with start and end times on it is the first line of interest
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const matchTimes = line.match(
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const matchTimes = line.match(
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/([0-9]{2}):([0-9]{2}):([0-9]{2}).([0-9]{2,3})( ?--> ?)([0-9]{2}):([0-9]{2}):([0-9]{2}).([0-9]{2,3})/,
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/([0-9]{2})?:?([0-9]{2}):([0-9]{2}).([0-9]{2,3})( ?--> ?)([0-9]{2})?:?([0-9]{2}):([0-9]{2}).([0-9]{2,3})/,
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); // Note that this currently ignores caption formatting directives that are optionally on the end of this line - fine for non-captions VTT
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); // Note that this currently ignores caption formatting directives that are optionally on the end of this line - fine for non-captions VTT
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if (matchTimes) {
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if (matchTimes) {
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result.startTime =
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result.startTime =
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Number(matchTimes[1]) * 60 * 60 +
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Number(matchTimes[1] || 0) * 60 * 60 +
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Number(matchTimes[2]) * 60 +
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Number(matchTimes[2]) * 60 +
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Number(matchTimes[3]) +
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Number(matchTimes[3]) +
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Number(`0.${matchTimes[4]}`);
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Number(`0.${matchTimes[4]}`);
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result.endTime =
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result.endTime =
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Number(matchTimes[6]) * 60 * 60 +
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Number(matchTimes[6] || 0) * 60 * 60 +
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Number(matchTimes[7]) * 60 +
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Number(matchTimes[7]) * 60 +
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Number(matchTimes[8]) +
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Number(matchTimes[8]) +
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Number(`0.${matchTimes[9]}`);
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Number(`0.${matchTimes[9]}`);
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