diff --git a/package-lock.json b/package-lock.json
index 6c30c1f..ecb42e8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "mediabunny",
-  "version": "1.32.0",
+  "version": "1.32.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "mediabunny",
-      "version": "1.32.0",
+      "version": "1.32.1",
       "license": "MPL-2.0",
       "workspaces": [
         "packages/*"
@@ -7739,9 +7739,9 @@
       }
     },
     "node_modules/mediabunny": {
-      "version": "1.31.1",
-      "resolved": "https://registry.npmjs.org/mediabunny/-/mediabunny-1.31.1.tgz",
-      "integrity": "sha512-7ijrySW675UTxXoAji8Xj/H8H1uyZhPDARlNO1FF1zGnzJV3snayU32c1bpumslx5vbUa/M7fm6kcG/3y7UxHQ==",
+      "version": "1.32.0",
+      "resolved": "https://registry.npmjs.org/mediabunny/-/mediabunny-1.32.0.tgz",
+      "integrity": "sha512-wMWynAQqZkmsLm+d2+fovcBal3zBQu/bot3u+yV4bDTfNxPeEDHv1wjiz6yjyKcXBuxfaQK96gImqLcKLfJG7w==",
       "license": "MPL-2.0",
       "peer": true,
       "workspaces": [
@@ -12065,7 +12065,7 @@
     },
     "packages/mp3-encoder": {
       "name": "@mediabunny/mp3-encoder",
-      "version": "1.32.0",
+      "version": "1.32.1",
       "license": "MPL-2.0",
       "devDependencies": {
         "@types/emscripten": "^1.40.1"
diff --git a/package.json b/package.json
index 0e6fdce..3123f32 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "mediabunny",
   "author": "Vanilagy",
-  "version": "1.32.0",
+  "version": "1.32.1",
   "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 4aa344f..60e1928 100644
--- a/packages/mp3-encoder/package.json
+++ b/packages/mp3-encoder/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@mediabunny/mp3-encoder",
   "author": "Vanilagy",
-  "version": "1.32.0",
+  "version": "1.32.1",
   "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/wave/wave-demuxer.ts b/src/wave/wave-demuxer.ts
index 8623963..899cebb 100644
--- a/src/wave/wave-demuxer.ts
+++ b/src/wave/wave-demuxer.ts
@@ -425,6 +425,10 @@ class WaveAudioTrackBacking implements InputAudioTrackBacking {
 		packetIndex: number,
 		options: PacketRetrievalOptions,
 	): Promise<EncodedPacket | null> {
+		if (packetIndex < 0) {
+			return null;
+		}
+
 		assert(this.demuxer.audioInfo);
 		const startOffset = packetIndex * PACKET_SIZE_IN_FRAMES * this.demuxer.audioInfo.blockSizeInBytes;
 		if (startOffset >= this.demuxer.dataSize) {
@@ -465,7 +469,7 @@ class WaveAudioTrackBacking implements InputAudioTrackBacking {
 
 		this.demuxer.lastKnownPacketIndex = Math.max(
 			packetIndex,
-			timestamp,
+			this.demuxer.lastKnownPacketIndex,
 		);
 
 		return new EncodedPacket(