dont' delete files

src/utils/log.js

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+let logging = false;
+let customLogger = () => {};
+
+const setLogging = (_logging) => {
+  logging = _logging;
+};
+
+const setCustomLogger = (logger) => {
+  customLogger = logger;
+};
+
+const log = (type, message) => {
+  customLogger({ type, message });
+  if (logging) {
+    console.log(`[${type}] ${message}`);
+  }
+};
+
+module.exports = {
+  logging,
+  setLogging,
+  setCustomLogger,
+  log,
+};

src/utils/parseProgress.js

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+let duration = 0;
+let ratio = 0;
+
+const ts2sec = (ts) => {
+  const [h, m, s] = ts.split(':');
+  return (parseFloat(h) * 60 * 60) + (parseFloat(m) * 60) + parseFloat(s);
+};
+
+module.exports = (message, progress) => {
+  if (typeof message === 'string') {
+    if (message.startsWith('  Duration')) {
+      const ts = message.split(', ')[0].split(': ')[1];
+      const d = ts2sec(ts);
+      progress({ duration: d, ratio });
+      if (duration === 0 || duration > d) {
+        duration = d;
+      }
+    } else if (message.startsWith('frame') || message.startsWith('size')) {
+      const ts = message.split('time=')[1].split(' ')[0];
+      const t = ts2sec(ts);
+      ratio = t / duration;
+      progress({ ratio, time: t });
+    } else if (message.startsWith('video:')) {
+      progress({ ratio: 1 });
+      duration = 0;
+    }
+  }
+};