KingCrimson.js

const { Decoder, Encoder, tools: {readVint, writeVint, createFloatBuffer} } = require('ts-ebml');
const fs = require("fs");

const decoder = new Decoder();
const encoder = new Encoder();

const file = fs.readFileSync(process.argv[2]);
const data = decoder.decode(file);
const out = [];

const enc = v => v === undefined ? "undef" : v;

const filters = ["Seek", "unknown", "DefaultDuration", "Cue", "FlagLacing", "Language", "SimpleTag", "Tag", "Targets"];
//const filters = ["Seek", "unknown"];

for(const seg of data) {
  // console.log(seg.tagStart + "\t" + seg.type + "\t" + enc(seg.isEnd) + "\t" + enc(seg.unknownSize) + "\t" + seg.name);
  if(filters.every(f => !seg.name.includes(f))) {
    if(seg.name === "Duration") {
      console.log(seg.type, seg.data)
      seg.data = Buffer.from([ 63, 128, 0, 0 ]);
      console.log(seg.data)
    }
    out.push(seg);
  }
}

const bytes = encoder.encode(out);
fs.writeFileSync("cursed_" + process.argv[2], Buffer.from(bytes));