diff --git a/media/libstagefright/MPEG4Writer.cpp b/media/libstagefright/MPEG4Writer.cpp
index d0f67308b97cc..907eb5752d507 100644
--- a/media/libstagefright/MPEG4Writer.cpp
+++ b/media/libstagefright/MPEG4Writer.cpp
@@ -1308,6 +1308,7 @@ void MPEG4Writer::writeAllChunks() {
     size_t outstandingChunks = 0;
     Chunk chunk;
     while (findChunkToWrite(&chunk)) {
+        writeChunkToFile(&chunk);
         ++outstandingChunks;
     }