diff --git a/trunk/src/kernel/srs_kernel_flv.cpp b/trunk/src/kernel/srs_kernel_flv.cpp
index 884568f31..d9432ceb5 100644
--- a/trunk/src/kernel/srs_kernel_flv.cpp
+++ b/trunk/src/kernel/srs_kernel_flv.cpp
@@ -842,7 +842,7 @@ srs_error_t SrsFlvVodStreamDecoder::read_sequence_header_summary(int64_t* pstart
             reader->skip(data_size + SRS_FLV_PREVIOUS_TAG_SIZE);
             continue;
         }
-        
+
         // if video duplicated, no audio
         if (is_video && got_video) {
             break;
@@ -868,7 +868,7 @@ srs_error_t SrsFlvVodStreamDecoder::read_sequence_header_summary(int64_t* pstart
         if (is_audio) {
             srs_assert(!got_audio);
             got_audio = true;
-            
+
             if (av_sequence_offset_start < 0) {
                 av_sequence_offset_start = reader->tellg() - SRS_FLV_TAG_HEADER_SIZE;
             }
diff --git a/trunk/src/utest/srs_utest_kernel.cpp b/trunk/src/utest/srs_utest_kernel.cpp
index 6d3814f0c..49c133c31 100644
--- a/trunk/src/utest/srs_utest_kernel.cpp
+++ b/trunk/src/utest/srs_utest_kernel.cpp
@@ -143,6 +143,7 @@ MockSrsFileReader::MockSrsFileReader()
     size = 0;
     offset = 0;
     opened = false;
+    seekable = true;
 }
 
 MockSrsFileReader::MockSrsFileReader(const char* src, int nb_src)
@@ -157,6 +158,7 @@ MockSrsFileReader::MockSrsFileReader(const char* src, int nb_src)
 
     offset = 0;
     opened = false;
+    seekable = true;
 }
 
 MockSrsFileReader::~MockSrsFileReader()
@@ -194,6 +196,10 @@ void MockSrsFileReader::skip(int64_t _size)
 
 int64_t MockSrsFileReader::seek2(int64_t _offset)
 {
+	if (!seekable) {
+		return -1;
+	}
+
     offset = (int)_offset;
     return offset;
 }
@@ -872,6 +878,63 @@ VOID TEST(KernelFLVTest, CoverReaderErrorCase)
 	}
 }
 
+VOID TEST(KernelFLVTest, CoverVodStreamErrorCase)
+{
+	srs_error_t err;
+
+	if (true) {
+		MockSrsFileReader r;
+		HELPER_EXPECT_SUCCESS(r.open(""));
+
+		SrsFlvVodStreamDecoder d;
+		HELPER_EXPECT_SUCCESS(d.initialize(&r));
+	}
+
+	if (true) {
+		MockSrsFileReader r;
+		HELPER_EXPECT_SUCCESS(r.open(""));
+
+		SrsFlvVodStreamDecoder d;
+		HELPER_EXPECT_SUCCESS(d.initialize(&r));
+
+		char header[13];
+		HELPER_EXPECT_FAILED(d.read_header_ext(header));
+	}
+
+	if (true) {
+		MockSrsFileReader r;
+		HELPER_EXPECT_SUCCESS(r.open(""));
+
+		SrsFlvVodStreamDecoder d;
+		HELPER_EXPECT_SUCCESS(d.initialize(&r));
+
+		int64_t start;
+		int size;
+		HELPER_EXPECT_FAILED(d.read_sequence_header_summary(&start, &size));
+	}
+
+	if (true) {
+		MockSrsFileReader r;
+		HELPER_EXPECT_SUCCESS(r.open(""));
+
+		SrsFlvVodStreamDecoder d;
+		HELPER_EXPECT_SUCCESS(d.initialize(&r));
+
+		HELPER_EXPECT_FAILED(d.seek2(1));
+	}
+
+	if (true) {
+		MockSrsFileReader r;
+		HELPER_EXPECT_SUCCESS(r.open(""));
+		r.seekable = false;
+
+		SrsFlvVodStreamDecoder d;
+		HELPER_EXPECT_SUCCESS(d.initialize(&r));
+
+		HELPER_EXPECT_FAILED(d.seek2(0));
+	}
+}
+
 /**
 * test the flv decoder,
 * exception: file stream not open.
diff --git a/trunk/src/utest/srs_utest_kernel.hpp b/trunk/src/utest/srs_utest_kernel.hpp
index 53ebdb692..f50906d78 100644
--- a/trunk/src/utest/srs_utest_kernel.hpp
+++ b/trunk/src/utest/srs_utest_kernel.hpp
@@ -82,6 +82,8 @@ public:
     int size;
     int offset;
     bool opened;
+    // Could seek.
+    bool seekable;
 public:
     MockSrsFileReader();
     MockSrsFileReader(const char* data, int nb_data);