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// Copyright (c) 2010 The WebM project authors. All Rights Reserved.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// This sample application demonstrates how to use the matroska parser
// library, which allows clients to handle a matroska format file.
#include "mkvreader.hpp"
#include "mkvparser.hpp"
#include <memory>
#ifdef _MSC_VER
// Silences these warnings:
// warning C4996: 'mbstowcs': This function or variable may be unsafe. Consider
// using mbstowcs_s instead. To disable deprecation, use
// _CRT_SECURE_NO_WARNINGS. See online help for details.
// Fixing this warning requires use of a function available only on Windows,
// and this sample code must support non-windows platforms.
#pragma warning(disable:4996)
static const wchar_t* utf8towcs(const char* str)
if (str == NULL)
return NULL;
//TODO: this probably requires that the locale be
//configured somehow:
const size_t size = mbstowcs(NULL, str, 0);
if (size == 0)
return NULL;
wchar_t* const val = new wchar_t[size+1];
mbstowcs(val, str, size);
val[size] = L'\0';
return val;
int main(int argc, char* argv[])
if (argc == 1)
printf("\t\t\tMkv Parser Sample Application\n");
printf("\t\t\tUsage: \n");
printf("\t\t\t ./sample [input file] \n");
printf("\t\t\t ./sample sample.mkv \n");
return -1;
using namespace mkvparser;
MkvReader reader;
if (reader.Open(argv[1]))
printf("\n Filename is invalid or error while opening.\n");
return -1;
int maj, min, build, rev;
GetVersion(maj, min, build, rev);
printf("\t\t libmkv verison: %d.%d.%d.%d\n", maj, min, build, rev);
long long pos = 0;
EBMLHeader ebmlHeader;
ebmlHeader.Parse(&reader, pos);
printf("\t\t\t EBML Header\n");
printf("\t\tEBML Version\t\t: %lld\n", ebmlHeader.m_version);
printf("\t\tEBML MaxIDLength\t: %lld\n", ebmlHeader.m_maxIdLength);
printf("\t\tEBML MaxSizeLength\t: %lld\n", ebmlHeader.m_maxSizeLength);
printf("\t\tDoc Type\t\t: %s\n", ebmlHeader.m_docType);
printf("\t\tPos\t\t\t: %lld\n", pos);
typedef mkvparser::Segment seg_t;
seg_t* pSegment_;
long long ret = seg_t::CreateInstance(&reader, pos, pSegment_);
if (ret)
printf("\n Segment::CreateInstance() failed.");
return -1;
const std::auto_ptr<seg_t> pSegment(pSegment_);
ret = pSegment->Load();
if (ret < 0)
printf("\n Segment::Load() failed.");
return -1;
const SegmentInfo* const pSegmentInfo = pSegment->GetInfo();
const long long timeCodeScale = pSegmentInfo->GetTimeCodeScale();
const long long duration_ns = pSegmentInfo->GetDuration();
const char* const pTitle_ = pSegmentInfo->GetTitleAsUTF8();
const wchar_t* const pTitle = utf8towcs(pTitle_);
const char* const pMuxingApp_ = pSegmentInfo->GetMuxingAppAsUTF8();
const wchar_t* const pMuxingApp = utf8towcs(pMuxingApp_);
const char* const pWritingApp_ = pSegmentInfo->GetWritingAppAsUTF8();
const wchar_t* const pWritingApp = utf8towcs(pWritingApp_);
printf("\t\t\t Segment Info\n");
printf("\t\tTimeCodeScale\t\t: %lld \n", timeCodeScale);
printf("\t\tDuration\t\t: %lld\n", duration_ns);
const double duration_sec = double(duration_ns) / 1000000000;
printf("\t\tDuration(secs)\t\t: %7.3lf\n", duration_sec);
if (pTitle == NULL)
printf("\t\tTrack Name\t\t: NULL\n");
printf("\t\tTrack Name\t\t: %ls\n", pTitle);
delete [] pTitle;
if (pMuxingApp == NULL)
printf("\t\tMuxing App\t\t: NULL\n");
printf("\t\tMuxing App\t\t: %ls\n", pMuxingApp);
delete [] pMuxingApp;
if (pWritingApp == NULL)
printf("\t\tWriting App\t\t: NULL\n");
printf("\t\tWriting App\t\t: %ls\n", pWritingApp);
delete [] pWritingApp;
// pos of segment payload
printf("\t\tPosition(Segment)\t: %lld\n", pSegment->m_start);
// size of segment payload
printf("\t\tSize(Segment)\t\t: %lld\n", pSegment->m_size);
const mkvparser::Tracks* pTracks = pSegment->GetTracks();
unsigned long i = 0;
const unsigned long j = pTracks->GetTracksCount();
printf("\n\t\t\t Track Info\n");
while (i != j)
const Track* const pTrack = pTracks->GetTrackByIndex(i++);
if (pTrack == NULL)
const long trackType = pTrack->GetType();
const long trackNumber = pTrack->GetNumber();
const unsigned long long trackUid = pTrack->GetUid();
const wchar_t* const pTrackName = utf8towcs(pTrack->GetNameAsUTF8());
printf("\t\tTrack Type\t\t: %ld\n", trackType);
printf("\t\tTrack Number\t\t: %ld\n", trackNumber);
printf("\t\tTrack Uid\t\t: %lld\n", trackUid);
if (pTrackName == NULL)
printf("\t\tTrack Name\t\t: NULL\n");
printf("\t\tTrack Name\t\t: %ls \n", pTrackName);
delete [] pTrackName;
const char* const pCodecId = pTrack->GetCodecId();
if (pCodecId == NULL)
printf("\t\tCodec Id\t\t: NULL\n");
printf("\t\tCodec Id\t\t: %s\n", pCodecId);
const char* const pCodecName_ = pTrack->GetCodecNameAsUTF8();
const wchar_t* const pCodecName = utf8towcs(pCodecName_);
if (pCodecName == NULL)
printf("\t\tCodec Name\t\t: NULL\n");
printf("\t\tCodec Name\t\t: %ls\n", pCodecName);
delete [] pCodecName;
if (trackType == mkvparser::Track::kVideo)
const VideoTrack* const pVideoTrack =
static_cast<const VideoTrack*>(pTrack);
const long long width = pVideoTrack->GetWidth();
printf("\t\tVideo Width\t\t: %lld\n", width);
const long long height = pVideoTrack->GetHeight();
printf("\t\tVideo Height\t\t: %lld\n", height);
const double rate = pVideoTrack->GetFrameRate();
printf("\t\tVideo Rate\t\t: %f\n",rate);
if (trackType == mkvparser::Track::kAudio)
const AudioTrack* const pAudioTrack =
static_cast<const AudioTrack*>(pTrack);
const long long channels = pAudioTrack->GetChannels();
printf("\t\tAudio Channels\t\t: %lld\n", channels);
const long long bitDepth = pAudioTrack->GetBitDepth();
printf("\t\tAudio BitDepth\t\t: %lld\n", bitDepth);
const double sampleRate = pAudioTrack->GetSamplingRate();
printf("\t\tAddio Sample Rate\t: %.3f\n", sampleRate);
printf("\n\n\t\t\t Cluster Info\n");
const unsigned long clusterCount = pSegment->GetCount();
printf("\t\tCluster Count\t: %ld\n\n", clusterCount);
if (clusterCount == 0)
printf("\t\tSegment has no clusters.\n");
return -1;
const mkvparser::Cluster* pCluster = pSegment->GetFirst();
while ((pCluster != NULL) && !pCluster->EOS())
const long long timeCode = pCluster->GetTimeCode();
printf("\t\tCluster Time Code\t: %lld\n", timeCode);
const long long time_ns = pCluster->GetTime();
printf("\t\tCluster Time (ns)\t: %lld\n", time_ns);
const BlockEntry* pBlockEntry;
long status = pCluster->GetFirst(pBlockEntry);
if (status < 0) //error
printf("\t\tError parsing first block of cluster\n");
return -1;
while ((pBlockEntry != NULL) && !pBlockEntry->EOS())
const Block* const pBlock = pBlockEntry->GetBlock();
const long long trackNum = pBlock->GetTrackNumber();
const unsigned long tn = static_cast<unsigned long>(trackNum);
const Track* const pTrack = pTracks->GetTrackByNumber(tn);
if (pTrack == NULL)
printf("\t\t\tBlock\t\t:UNKNOWN TRACK TYPE\n");
const long long trackType = pTrack->GetType();
const int frameCount = pBlock->GetFrameCount();
const long long time_ns = pBlock->GetTime(pCluster);
(trackType == mkvparser::Track::kVideo) ? "V" : "A",
pBlock->IsKey() ? "I" : "P",
for (int i = 0; i < frameCount; ++i)
const Block::Frame& theFrame = pBlock->GetFrame(i);
const long size = theFrame.len;
const long long offset = theFrame.pos;
printf("\t\t\t %15ld,%15llx\n", size, offset);
status = pCluster->GetNext(pBlockEntry, pBlockEntry);
if (status < 0)
printf("\t\t\tError parsing next block of cluster\n");
return -1;
pCluster = pSegment->GetNext(pCluster);
return 0;