diff --git a/media/libmediatranscoding/transcoder/MediaSampleReaderNDK.cpp b/media/libmediatranscoding/transcoder/MediaSampleReaderNDK.cpp
index 1a6e7ed..8d36e31 100644
--- a/media/libmediatranscoding/transcoder/MediaSampleReaderNDK.cpp
+++ b/media/libmediatranscoding/transcoder/MediaSampleReaderNDK.cpp
@@ -98,6 +98,9 @@
         mTrackCursors[mExtractorTrackIndex].next.reset();
     }
 
+    // Update the extractor's sample index even if this track reaches EOS, so that the other tracks
+    // are not given an incorrect extractor position.
+    mExtractorSampleIndex++;
     if (!AMediaExtractor_advance(mExtractor)) {
         LOG(DEBUG) << "  EOS in advanceExtractor_l";
         mEosReached = true;
@@ -108,7 +111,6 @@
     }
 
     mExtractorTrackIndex = AMediaExtractor_getSampleTrackIndex(mExtractor);
-    mExtractorSampleIndex++;
 
     SampleCursor& cursor = mTrackCursors[mExtractorTrackIndex];
     if (mExtractorSampleIndex > cursor.previous.index) {
diff --git a/media/libmediatranscoding/transcoder/tests/MediaSampleReaderNDKTests.cpp b/media/libmediatranscoding/transcoder/tests/MediaSampleReaderNDKTests.cpp
index 11af0b1..3a499e5 100644
--- a/media/libmediatranscoding/transcoder/tests/MediaSampleReaderNDKTests.cpp
+++ b/media/libmediatranscoding/transcoder/tests/MediaSampleReaderNDKTests.cpp
@@ -272,6 +272,38 @@
     compareSamples(tester.getSamples());
 }
 
+/** Reads all samples except the last in each track, before finishing. */
+TEST_F(MediaSampleReaderNDKTests, TestLastSampleBeforeEOS) {
+    LOG(DEBUG) << "TestLastSampleBeforeEOS Starts";
+    initExtractorSamples();
+
+    {  // Natural track order
+        SampleAccessTester tester{mSourceFd, mFileSize};
+        for (int trackIndex = 0; trackIndex < mTrackCount; ++trackIndex) {
+            tester.readSamplesAsync(trackIndex, mExtractorSamples[trackIndex].size() - 1);
+        }
+        tester.waitForTracks();
+        for (int trackIndex = 0; trackIndex < mTrackCount; ++trackIndex) {
+            tester.readSamplesAsync(trackIndex, SAMPLE_COUNT_ALL);
+            tester.waitForTrack(trackIndex);
+        }
+        compareSamples(tester.getSamples());
+    }
+
+    {  // Reverse track order
+        SampleAccessTester tester{mSourceFd, mFileSize};
+        for (int trackIndex = mTrackCount - 1; trackIndex >= 0; --trackIndex) {
+            tester.readSamplesAsync(trackIndex, mExtractorSamples[trackIndex].size() - 1);
+        }
+        tester.waitForTracks();
+        for (int trackIndex = mTrackCount - 1; trackIndex >= 0; --trackIndex) {
+            tester.readSamplesAsync(trackIndex, SAMPLE_COUNT_ALL);
+            tester.waitForTrack(trackIndex);
+        }
+        compareSamples(tester.getSamples());
+    }
+}
+
 /** Reads all samples from all tracks sequentially. */
 TEST_F(MediaSampleReaderNDKTests, TestSequentialSampleAccess) {
     LOG(DEBUG) << "TestSequentialSampleAccess Starts";