diff --git a/index.js b/index.js
index c71b391..139d2c7 100644
--- a/index.js
+++ b/index.js
@@ -29,7 +29,7 @@ app.get("/convert", async (req, res) => {
       '-i', filePath,
       '-f', formats[format] || format,
       '-movflags', 'frag_keyframe+empty_moov',
-      '-vcodec', 'copy',
+      '-c', 'copy',
       '-'
     ], {
       stdio: [
diff --git a/static/index.html b/static/index.html
index bb2ca38..020a241 100644
--- a/static/index.html
+++ b/static/index.html
@@ -38,8 +38,6 @@
             <option disabled>Video Formats</option>
             <option value="mp4">.mp4</option>
             <option value="mkv">.mkv</option>
-            <option value="flv">.flv</option>
-            <option value="avi">.avi</option>
             <option disabled>Audio Formats</option>
             <option value="mp3" selected>.mp3</option>
             <option value="wav">.wav</option>