diff --git a/dev/mux.html b/dev/mux.html
index 54023ea..d643874 100644
--- a/dev/mux.html
+++ b/dev/mux.html
@@ -34,8 +34,8 @@
 	}
 
 	const canvas = document.createElement('canvas');
-	canvas.width = 1920;
-	canvas.height = 1080;
+	canvas.width = 640;
+	canvas.height = 480;
 	const context = canvas.getContext('2d');
 
 	let format = new Mediabunny.MkvOutputFormat({ streamable: false });
@@ -47,7 +47,7 @@
 	format = new Mediabunny.MkvOutputFormat();
 	format = new Mediabunny.MovOutputFormat();
 	format = new Mediabunny.Mp4OutputFormat({ fastStart: 'reserve' });
-	format = new Mediabunny.MkvOutputFormat();
+	format = new Mediabunny.WebMOutputFormat();
 	let target = new Mediabunny.BufferTarget();
 
 	/*
diff --git a/package-lock.json b/package-lock.json
index 90b90ad..4b74941 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "mediabunny",
-  "version": "1.19.1",
+  "version": "1.20.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "mediabunny",
-      "version": "1.19.1",
+      "version": "1.20.0",
       "license": "MPL-2.0",
       "workspaces": [
         "packages/*"
@@ -7749,9 +7749,9 @@
       }
     },
     "node_modules/mediabunny": {
-      "version": "1.19.0",
-      "resolved": "https://registry.npmjs.org/mediabunny/-/mediabunny-1.19.0.tgz",
-      "integrity": "sha512-tqQqaqY/G8U+oa6NsgffxsBJnoYl8A6bMtHWVnvjyp1FAeBH7f5oZKQpRVGWMpRMd9EK852sFvOOq/dOmb+Mvg==",
+      "version": "1.19.1",
+      "resolved": "https://registry.npmjs.org/mediabunny/-/mediabunny-1.19.1.tgz",
+      "integrity": "sha512-nyaxskRhj7w634RZ/D0+xbc//nclDVBM1eG9hrrPL/lEG4PW1pBSRHsgPRXQX/PvUXNfJTYQsTl0SYFCrch9PA==",
       "license": "MPL-2.0",
       "peer": true,
       "workspaces": [
@@ -12242,7 +12242,7 @@
     },
     "packages/mp3-encoder": {
       "name": "@mediabunny/mp3-encoder",
-      "version": "1.19.1",
+      "version": "1.20.0",
       "license": "MPL-2.0",
       "devDependencies": {
         "@types/emscripten": "^1.40.1"
diff --git a/package.json b/package.json
index 9876f85..0bc543a 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "mediabunny",
   "author": "Vanilagy",
-  "version": "1.19.1",
+  "version": "1.20.0",
   "description": "Pure TypeScript media toolkit for reading, writing, and converting media files, directly in the browser.",
   "type": "module",
   "workspaces": [
diff --git a/packages/mp3-encoder/package.json b/packages/mp3-encoder/package.json
index fdee1b9..274cd6d 100644
--- a/packages/mp3-encoder/package.json
+++ b/packages/mp3-encoder/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@mediabunny/mp3-encoder",
   "author": "Vanilagy",
-  "version": "1.19.1",
+  "version": "1.20.0",
   "description": "MP3 encoder extension for Mediabunny, based on LAME.",
   "main": "./dist/bundles/mediabunny-mp3-encoder.mjs",
   "module": "./dist/bundles/mediabunny-mp3-encoder.mjs",