diff --git a/src/isobmff/isobmff-demuxer.ts b/src/isobmff/isobmff-demuxer.ts
index d4d08d3..4161791 100644
--- a/src/isobmff/isobmff-demuxer.ts
+++ b/src/isobmff/isobmff-demuxer.ts
@@ -2263,7 +2263,7 @@ const getSampleInfo = (sampleTable: SampleTable, sampleIndex: number): SampleInf
 		x => x.startIndex,
 	);
 	const offsetEntry = sampleTable.sampleCompositionTimeOffsets[offsetEntryIndex];
-	if (offsetEntry) {
+	if (offsetEntry && sampleIndex - offsetEntry.startIndex < offsetEntry.count) {
 		presentationTimestamp += offsetEntry.offset;
 	}