diff --git a/dev/demux.html b/dev/demux.html
index d53045c..1a864a3 100644
--- a/dev/demux.html
+++ b/dev/demux.html
@@ -14,11 +14,13 @@
 			source: new Mediabunny.BlobSource(file),
 		});
 
-		const videoTrack = await input.getPrimaryVideoTrack();
+		const videoTrack = await input.getPrimaryAudioTrack();
 		const sink = new Mediabunny.EncodedPacketSink(videoTrack);
 
 		for await (const packet of sink.packets()) {
 			console.log(packet.timestamp, packet.duration, packet.timestamp + packet.duration);
+
+			if (packet.timestamp > 10) break;
 		}
 
 		/*
diff --git a/src/matroska/matroska-demuxer.ts b/src/matroska/matroska-demuxer.ts
index 79c84f4..e964bef 100644
--- a/src/matroska/matroska-demuxer.ts
+++ b/src/matroska/matroska-demuxer.ts
@@ -844,13 +844,13 @@ export class MatroskaDemuxer extends Demuxer {
 
 			blocks.splice(blockIndex, 1); // Remove the original block
 
+			const blockDuration = originalBlock.duration || frameCount * (track.defaultDuration ?? 0);
+
 			// Now, let's insert each frame as its own block
 			for (let i = 0; i < frameCount; i++) {
 				const frameSize = frameSizes[i]!;
 				const frameData = readBytes(slice, frameSize);
 
-				const blockDuration = originalBlock.duration || (frameCount * (track.defaultDuration ?? 0));
-
 				// Distribute timestamps evenly across the block duration
 				const frameTimestamp = originalBlock.timestamp + (blockDuration * i / frameCount);
 				const frameDuration = blockDuration / frameCount;
@@ -1181,9 +1181,8 @@ export class MatroskaDemuxer extends Demuxer {
 			case EBMLId.DefaultDuration: {
 				if (!this.currentTrack) break;
 
-				// Floored to reduce chance of overlapping packets (https://github.com/Vanilagy/mediabunny/issues/170)
 				this.currentTrack.defaultDuration
-					= Math.floor(this.currentTrack.segment.timestampFactor * readUnsignedInt(slice, size) / 1e9);
+					= this.currentTrack.segment.timestampFactor * readUnsignedInt(slice, size) / 1e9;
 			}; break;
 
 			case EBMLId.Name: {