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MP4: Get duration from mvhd if not present in mdhd (#1165) (#1168)

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This commit is contained in:
Urs Fleisch
2023-11-05 14:40:37 +01:00
committed by GitHub
parent dfa33bec08
commit 2f4c76b52a
2 changed files with 34 additions and 0 deletions
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23
tests/test_mp4.cpp
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@ -47,6 +47,7 @@ class TestMP4 : public CppUnit::TestFixture
CPPUNIT_TEST(testPropertiesAACWithoutBitrate);
CPPUNIT_TEST(testPropertiesALAC);
CPPUNIT_TEST(testPropertiesALACWithoutBitrate);
CPPUNIT_TEST(testPropertiesAACWithoutLength);
CPPUNIT_TEST(testPropertiesM4V);
CPPUNIT_TEST(testFreeForm);
CPPUNIT_TEST(testCheckValid);
@ -144,6 +145,28 @@ public:
CPPUNIT_ASSERT_EQUAL(MP4::Properties::ALAC, f.audioProperties()->codec());
}
void testPropertiesAACWithoutLength()
{
ByteVector m4aData = PlainFile(TEST_FILE_PATH_C("no-tags.m4a")).readAll();
CPPUNIT_ASSERT_EQUAL(2898U, m4aData.size());
CPPUNIT_ASSERT_EQUAL(ByteVector("mdhd"), m4aData.mid(1749, 4));
// Set the length to zero
for (int offset = 1769; offset < 1773; ++offset) {
m4aData[offset] = 0;
}
ByteVectorStream m4aStream(m4aData);
MP4::File f(&m4aStream);
CPPUNIT_ASSERT(f.audioProperties());
CPPUNIT_ASSERT_EQUAL(3, f.audioProperties()->lengthInSeconds());
CPPUNIT_ASSERT_EQUAL(3707, f.audioProperties()->lengthInMilliseconds());
CPPUNIT_ASSERT_EQUAL(3, f.audioProperties()->bitrate());
CPPUNIT_ASSERT_EQUAL(2, f.audioProperties()->channels());
CPPUNIT_ASSERT_EQUAL(44100, f.audioProperties()->sampleRate());
CPPUNIT_ASSERT_EQUAL(16, f.audioProperties()->bitsPerSample());
CPPUNIT_ASSERT_EQUAL(false, f.audioProperties()->isEncrypted());
CPPUNIT_ASSERT_EQUAL(MP4::Properties::AAC, f.audioProperties()->codec());
}
void testPropertiesM4V()
{
MP4::File f(TEST_FILE_PATH_C("blank_video.m4v"));