diff --git a/src/ChecksumResolver.js b/src/ChecksumResolver.js
index bb4fd45..4759010 100644
--- a/src/ChecksumResolver.js
+++ b/src/ChecksumResolver.js
@@ -89,7 +89,7 @@ class ChecksumResolver extends React.Component {
                     audible-tools
             </Link>{' '}
                 {new Date().getFullYear()}
-                {'. V 0.1'}
+                {'. V 0.2'}
             </Typography>
         );
     })
diff --git a/src/ControlledAccordions.js b/src/ControlledAccordions.js
index fa5103f..ab0ecb9 100644
--- a/src/ControlledAccordions.js
+++ b/src/ControlledAccordions.js
@@ -61,9 +61,9 @@ class ControlledAccordions extends React.Component {
         // " works on ps and cmd as discriminator
 
         const outputFormatCodecMaps = [
-            { format: "m4b", codec: "copy" },
-            { format: "flac", codec: "flac" },
-            { format: "mp3", codec: "libmp3lame" },
+            { format: "m4b", codec: "-codec copy" },
+            { format: "flac", codec: "-codec:a flac" },
+            { format: "mp3", codec: "-codec:a libmp3lame" },
         ];
 
         const osToBinMaps = [
@@ -82,12 +82,13 @@ class ControlledAccordions extends React.Component {
         const di = osMap.discriminator;
         const sep = osMap.separator;
         
-        return `${bin} -y`
-            + ` -activation_bytes ${activationBytes} -i  ${di}.${sep}${fileName}${di}`
-            + ` -map_metadata 0`
-            + ` -id3v2_version 3`
-            + ` -codec:a ${codec}`
-            + ` -vn ${di}${fileNameWithoutExtension}.${outputFormat}${di}`;
+        return [
+            `${bin} -y`,
+            `-activation_bytes ${activationBytes}`,
+            `-i  ${di}.${sep}${fileName}${di}`,
+            codec,
+            `${di}${fileNameWithoutExtension}.${outputFormat}${di}`
+        ].join(" ")
     }
 
     render() {
diff --git a/src/OnlineConverter.jsx b/src/OnlineConverter.jsx
index 50bcfec..9f5f17b 100644
--- a/src/OnlineConverter.jsx
+++ b/src/OnlineConverter.jsx
@@ -15,17 +15,17 @@ const downloadFile= (data, outputFileName, outputFormat) => {
 }
 const getCommandAsList = (file, outputFileName, outputFormat, activationBytes) =>{
     const outputFormatCodecMaps = [
-        { format: "m4b", codec: "copy" },
-        { format: "flac", codec: "flac" },
-        { format: "mp3", codec: "libmp3lame" },
+        { format: "m4b", codec: "-c copy" },
+        { format: "flac", codec: "-c:a flac" },
+        { format: "mp3", codec: "-c:a libmp3lame" },
     ];
     const codec = outputFormatCodecMaps.filter(x => x.format === outputFormat)[0].codec;
     const filename = file.name;
     return [`-y`,
         '-activation_bytes', activationBytes,
         '-i', filename,
-        '-c:a', codec,
-        '-vn', outputFileName
+        codec,
+        outputFileName
     ];
 }
 const doTranscode = async (file, outputFileName, outputFormat, activationBytes, setMessage) => {