improve progress reading

src/ffmpeg.js

@@ -76,8 +76,12 @@ function handleProgress(process, cutDuration, onProgress) {
 
   const rl = readline.createInterface({ input: process.stderr });
   rl.on('line', (line) => {
+    // console.log('progress', line);
+
     try {
-      const match = line.match(/frame=\s*[^\s]+\s+fps=\s*[^\s]+\s+q=\s*[^\s]+\s+(?:size|Lsize)=\s*[^\s]+\s+time=\s*([^\s]+)\s+/); // eslint-disable-line max-len
+      let match = line.match(/frame=\s*[^\s]+\s+fps=\s*[^\s]+\s+q=\s*[^\s]+\s+(?:size|Lsize)=\s*[^\s]+\s+time=\s*([^\s]+)\s+/);
+      // Audio only looks like this: "line size=  233422kB time=01:45:50.68 bitrate= 301.1kbits/s speed= 353x    "
+      if (!match) match = line.match(/(?:size|Lsize)=\s*[^\s]+\s+time=\s*([^\s]+)\s+/);
       if (!match) return;
 
       const str = match[1];