63 lines
1.5 KiB
JavaScript
63 lines
1.5 KiB
JavaScript
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import { extname } from "path";
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const args = process.argv.slice(-2);
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const video = args[0];
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const labels = args[1];
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const ext = extname(video);
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const labels_contents = (await $`awk '{print $3, $4, $5}' < ${labels}`).stdout;
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const FREQ = 48000;
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const working_dir = "/tmp/dziurkacz";
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const before_path = `${working_dir}/before${ext}`;
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const after_path = `${working_dir}/after${ext}`;
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const working_path = `${working_dir}/working${ext}`;
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const vdlist = `${working_dir}/vdlist.txt`;
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async function makeCut({ duration, start, end }) {
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await Promise.all([
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$`ffmpeg -i ${working_path} -to ${start} -c copy -an -y ${before_path}`,
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$`ffmpeg -ss ${end} -i ${working_path} -c copy -an -y ${after_path}`,
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]);
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await Promise.all([
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$`echo file ${before_path} > ${vdlist}`,
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$`echo file ${after_path} >> ${vdlist}`,
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]);
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await $`ffmpeg -f concat -safe 0 -i ${vdlist} -c copy -y ${working_path} `;
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}
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await $`mkdir -p ${working_dir}`;
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await $`cp -f ${video} ${working_path}`;
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const cuts = labels_contents
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.split(os.EOL)
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.slice(0, -1)
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.map((e) =>
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e
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.split(" ")
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.slice(1)
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.map((x) => parseFloat(x))
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)
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.map(([samples, start]) => ({
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duration: samples / FREQ,
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start,
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end: start + samples / FREQ,
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}));
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// await makeCut(cuts[0]);
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// await makeCut(cuts[1]);
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for (const cut of cuts) {
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await makeCut(cut);
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}
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console.log(
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`Removed ${cuts
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.map((e) => e.duration)
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.reduce((a, b) => a + b, 0)
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.toFixed(3)}s from video`
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);
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