diff --git a/media/libstagefright/MediaCodecSource.cpp b/media/libstagefright/MediaCodecSource.cpp
index 0aafa6b..5039922 100644
--- a/media/libstagefright/MediaCodecSource.cpp
+++ b/media/libstagefright/MediaCodecSource.cpp
@@ -648,6 +648,15 @@
             CHECK(mbuf->meta_data()->findInt64(kKeyTime, &timeUs));
             timeUs += mInputBufferTimeOffsetUs;
 
+            // Due to the extra delay adjustment at the beginning of start/resume,
+            // the adjusted timeUs may be negative if MediaCodecSource goes into pause
+            // state before feeding any buffers to the encoder. Drop the buffer in this
+            // case.
+            if (timeUs < 0) {
+                mbuf->release();
+                return OK;
+            }
+
             // push decoding time for video, or drift time for audio
             if (mIsVideo) {
                 mDecodingTimeQueue.push_back(timeUs);
@@ -832,9 +841,16 @@
                         // Time offset is not applied at
                         // feedEncoderInputBuffer() in surface input case.
                         timeUs += mInputBufferTimeOffsetUs;
-                        // GraphicBufferSource is supposed to discard samples
-                        // queued before start, and offset timeUs by start time
-                        CHECK_GE(timeUs, 0ll);
+
+                        // Due to the extra delay adjustment at the beginning of
+                        // start/resume, the adjusted timeUs may be negative if
+                        // MediaCodecSource goes into pause state before feeding
+                        // any buffers to the encoder. Drop the buffer in this case.
+                        if (timeUs < 0) {
+                            mEncoder->releaseOutputBuffer(index);
+                            break;
+                        }
+
                         // TODO:
                         // Decoding time for surface source is unavailable,
                         // use presentation time for now. May need to move