diff --git a/acm-config-default.json b/acm-config-default.json
index 8e3e4e4..e9173a1 100644
--- a/acm-config-default.json
+++ b/acm-config-default.json
@@ -25,8 +25,8 @@
           "mp4",
           "webm"
         ],
-        "outputExtension": "mp4",
-        "command": "ffmpeg -hide_banner -loglevel panic -i {{input_file}} -vcodec libx264 -crf 20 {{output_file}}"
+        "outputExtension": "webm",
+        "command": "ffmpeg -hide_banner -loglevel panic -i {{input_file}} -c:v libvpx -crf 10 {{output_file}}"
       },
       "audio": {
         "processors": ["ffmpeg", "opusenc"],
@@ -103,8 +103,8 @@
           "mp4",
           "webm"
         ],
-        "outputExtension": "mp4",
-        "command": "ffmpeg -hide_banner -loglevel panic -i {{input_file}} -vf scale=-1:720 -vcodec libx264 -crf 24 {{output_file}}"
+        "outputExtension": "webm",
+        "command": "ffmpeg -hide_banner -loglevel panic -i {{input_file}} -vf scale=-1:720 -c:v libvpx -crf 16 {{output_file}}"
       },
       "audio": {
         "processors": ["ffmpeg", "opusenc"],