Fix video progress: parse each chunk, -progress pipe:2, out_time support

- Parse time= from each stderr chunk (not accumulated buffer)
- Add -progress pipe:2 flag for frequent progress output
- Support both time= and out_time= formats
- Progress only increases (no jumps back)

routes/video.js

@@ -33,24 +33,26 @@ const jobs = new Map();
 function runFFmpeg(args, jobId) {
   return new Promise((resolve, reject) => {
     const proc = spawn('ffmpeg', args, { timeout: 600000 }); // 10 min timeout
-    let stderr = '';
+    let stderrBuf = '';
 
     proc.stderr.on('data', (d) => {
-      stderr += d.toString();
-      // Parse progress
-      const timeMatch = stderr.match(/time=(\d{2}):(\d{2}):(\d{2})/);
+      const chunk = d.toString();
+      stderrBuf += chunk;
+      // Parse progress — look for time= or out_time= in chunk
+      const timeMatch = chunk.match(/(?:out_time|time)=\s*(\d{2}):(\d{2}):(\d{2})[\.\d]*/);
       if (timeMatch && jobs.has(jobId)) {
         const secs = parseInt(timeMatch[1]) * 3600 + parseInt(timeMatch[2]) * 60 + parseInt(timeMatch[3]);
         const job = jobs.get(jobId);
         if (job.duration > 0) {
-          job.progress = Math.min(99, Math.round((secs / job.duration) * 100));
+          const pct = Math.min(99, Math.round((secs / job.duration) * 100));
+          if (pct > job.progress) job.progress = pct; // only increase
         }
       }
     });
 
     proc.on('close', (code) => {
       if (code === 0) resolve();
-      else reject(new Error(`ffmpeg exited with code ${code}: ${stderr.slice(-500)}`));
+      else reject(new Error(`ffmpeg exited with code ${code}: ${stderrBuf.slice(-500)}`));
     });
 
     proc.on('error', reject);
@@ -144,7 +146,7 @@ router.post('/convert', express.json(), async (req, res) => {
   job.outputPath = outFile;
 
   try {
-    let args = ['-y', '-i', job.inputPath];
+    let args = ['-y', '-progress', 'pipe:2', '-i', job.inputPath];
 
     // Time range (for GIF or trim)
     if (startTime !== undefined && startTime > 0) args.push('-ss', String(startTime));