diff --git a/interface/mmal/test/examples/example_basic_1.c b/interface/mmal/test/examples/example_basic_1.c
index 49b984e28..9707cb9fa 100644
--- a/interface/mmal/test/examples/example_basic_1.c
+++ b/interface/mmal/test/examples/example_basic_1.c
@@ -33,7 +33,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #define CHECK_STATUS(status, msg) if (status != MMAL_SUCCESS) { fprintf(stderr, msg"\n"); goto error; }
 
-static uint8_t codec_header_bytes[512];
+static uint8_t codec_header_bytes[128];
 static unsigned int codec_header_bytes_size = sizeof(codec_header_bytes);
 
 static FILE *source_file;
diff --git a/interface/mmal/test/examples/example_basic_2.c b/interface/mmal/test/examples/example_basic_2.c
index cc474f268..f7c885d70 100644
--- a/interface/mmal/test/examples/example_basic_2.c
+++ b/interface/mmal/test/examples/example_basic_2.c
@@ -35,7 +35,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #define CHECK_STATUS(status, msg) if (status != MMAL_SUCCESS) { fprintf(stderr, msg"\n"); goto error; }
 
-static uint8_t codec_header_bytes[512];
+static uint8_t codec_header_bytes[128];
 static unsigned int codec_header_bytes_size = sizeof(codec_header_bytes);
 
 static FILE *source_file;