diff --git a/package-lock.json b/package-lock.json
index 5c23700..ab1d590 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "mediabunny",
-  "version": "1.14.1",
+  "version": "1.14.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "mediabunny",
-      "version": "1.14.1",
+      "version": "1.14.2",
       "license": "MPL-2.0",
       "workspaces": [
         "packages/*"
@@ -7749,9 +7749,9 @@
       }
     },
     "node_modules/mediabunny": {
-      "version": "1.14.0",
-      "resolved": "https://registry.npmjs.org/mediabunny/-/mediabunny-1.14.0.tgz",
-      "integrity": "sha512-GaULQgUWpz5m4S7N6iNjpyLxqhpudjcSNGLC4Ni9A0A2vA6l5frBpxQJZM2JmqrN1B2BkArnCgyuTZv7ePw2vQ==",
+      "version": "1.14.1",
+      "resolved": "https://registry.npmjs.org/mediabunny/-/mediabunny-1.14.1.tgz",
+      "integrity": "sha512-TjLg8GQGGsnGePcA6i0NItGe9a5G8WaleCGaXpb5V5okwuK5KpNKfcmTZXItnjfPLo7FvfEZI0NFp1lIR8Os7Q==",
       "license": "MPL-2.0",
       "peer": true,
       "workspaces": [
@@ -12242,7 +12242,7 @@
     },
     "packages/mp3-encoder": {
       "name": "@mediabunny/mp3-encoder",
-      "version": "1.14.1",
+      "version": "1.14.2",
       "license": "MPL-2.0",
       "devDependencies": {
         "@types/emscripten": "^1.40.1"
diff --git a/package.json b/package.json
index 78dbbe5..b3d43b7 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "mediabunny",
   "author": "Vanilagy",
-  "version": "1.14.1",
+  "version": "1.14.2",
   "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 cf89587..530fce7 100644
--- a/packages/mp3-encoder/package.json
+++ b/packages/mp3-encoder/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@mediabunny/mp3-encoder",
   "author": "Vanilagy",
-  "version": "1.14.1",
+  "version": "1.14.2",
   "description": "MP3 encoder extension for Mediabunny, based on LAME.",
   "main": "./dist/bundles/mediabunny-mp3-encoder.mjs",
   "module": "./dist/bundles/mediabunny-mp3-encoder.mjs",
diff --git a/src/conversion.ts b/src/conversion.ts
index cc48e63..19ab3f9 100644
--- a/src/conversion.ts
+++ b/src/conversion.ts
@@ -534,9 +534,14 @@ export class Conversion {
 		if (this.onProgress) {
 			this._computeProgress = true;
 			this._totalDuration = Math.min(
-				await this.input.computeDuration() - this._startTimestamp,
+				(await this.input.computeDuration()) - this._startTimestamp,
 				this._endTimestamp - this._startTimestamp,
 			);
+
+			for (const track of this.utilizedTracks) {
+				this._maxTimestamps.set(track.id, 0);
+			}
+
 			this.onProgress?.(0);
 		}
 
@@ -1160,7 +1165,10 @@ export class Conversion {
 		}
 		assert(this._totalDuration !== null);
 
-		this._maxTimestamps.set(trackId, Math.max(endTimestamp, this._maxTimestamps.get(trackId) ?? -Infinity));
+		this._maxTimestamps.set(
+			trackId,
+			Math.max(endTimestamp, this._maxTimestamps.get(trackId)!),
+		);
 
 		const minTimestamp = Math.min(...this._maxTimestamps.values());
 		const newProgress = clamp(minTimestamp / this._totalDuration, 0, 1);