example.sh

ffprobe C2.ts -show_frames | ./frames_to_json.js > C2.json

frames_to_json.js

#!/usr/bin/env node
'use strict';

let strings = [];

process.stdin.on('readable', () => {
  var chunk = process.stdin.read();
  if (chunk !== null) {
    strings.push(chunk.toString());
  }
});

process.stdin.on('end', () => {
  let contents = strings.join('');

  contents = contents.replace(/\[\/FRAME\]\n\[FRAME\]/igm, '},\n{');
  contents = contents.replace(/\[FRAME\]/igm, '{');
  contents = contents.replace(/\[\/FRAME\]/igm, '}');
  contents = contents.replace(/(\w*)=([\d.]*)\n/igm, '"$1": $2,\n');
  contents = contents.replace(/(\w*)=([^\n]*)\n/igm, '"$1": "$2",\n');
  contents = contents.replace(/,\n}/igm, '\n}');

  contents = '[' + contents + ']';
  process.stdout.write(contents);
});