diff --git a/stream/__init__.py b/stream/__init__.py
index 51aedbb..eaa8256 100644
--- a/stream/__init__.py
+++ b/stream/__init__.py
@@ -165,9 +165,9 @@ class Plugin_OBJ():
 
         ffmpeg_command = []
         ffmpeg_command.extend([
-                                "-c:v", "copy",
-                                "-c:a", "copy",
-                                "-f", "mp4"
+                                "-c:v", "libvpx",
+                                "-c:a", "libvorbis",
+                                "-f", "webm"
                                 ])
 
         return ffmpeg_command