diff --git a/index.js b/index.js
index b706222..55741ac 100644
--- a/index.js
+++ b/index.js
@@ -46,6 +46,8 @@ app.post("/convert", uploads.single("files"), (req, res) => {
     '-f', format,
     '-loglevel', 'error',
     '-movflags', 'frag_keyframe+empty_moov',
+    '-vcodec', 'copy' ,
+    '-acodec', 'copy',
     '-'
   ], {
     stdio: [
diff --git a/static/converter/index.html b/static/converter/index.html
index 96465e1..71952ed 100644
--- a/static/converter/index.html
+++ b/static/converter/index.html
@@ -47,7 +47,6 @@
                 <option value="mp4">.mp4</option>
                 <option value="matroska">.mkv</option>
                 <option value="flv">.flv</option>
-                <option value="avi">.avi</option>
                 <option value="mov">.mov</option>
                 <option disabled>Audio Formats</option>
                 <option value="mp3">.mp3</option>