fix: enhance copyToWorkDir to log progress and improve video bitrate estimation in transcoding

LocalFlowPlugins/utility/copyToWorkDir/1.0.0/index.js

@@ -82,9 +82,13 @@ const plugin = async (args) => {
   }
 
   // ── Copy using streams (no RAM spike for large files) ────────────────────
-  jobLog(`[copyToWorkDir] Copying to: ${localCopy}\n`);
+  const sourceSize = fs.statSync(inputFile).size;
+  const sourceSizeMb = (sourceSize / 1024 / 1024).toFixed(1);
+  jobLog(`[copyToWorkDir] Copying ${sourceSizeMb} MB to: ${localCopy}\n`);
 
   const startMs = Date.now();
+  let copiedBytes = 0;
+  let nextProgressPercent = 10;
 
   await new Promise((resolve, reject) => {
     const rd = fs.createReadStream(inputFile);
@@ -93,6 +97,19 @@ const plugin = async (args) => {
     rd.on('error', reject);
     wr.on('error', reject);
     wr.on('finish', resolve);
+    rd.on('data', (chunk) => {
+      copiedBytes += chunk.length;
+      if (sourceSize <= 0) return;
+
+      const percent = Math.floor((copiedBytes / sourceSize) * 100);
+      if (percent < nextProgressPercent) return;
+
+      const elapsedSeconds = Math.max((Date.now() - startMs) / 1000, 0.1);
+      const copiedMb = (copiedBytes / 1024 / 1024).toFixed(1);
+      const speedMbPerSecond = (copiedBytes / 1024 / 1024 / elapsedSeconds).toFixed(1);
+      jobLog(`[copyToWorkDir] Progress: ${Math.min(percent, 100)}% (${copiedMb}/${sourceSizeMb} MB, ${speedMbPerSecond} MB/s)\n`);
+      nextProgressPercent = (Math.floor(percent / 10) + 1) * 10;
+    });
     rd.pipe(wr);
   });