Fixed progressive MP4 track selection.

This commit is contained in:
Thulinma 2014-01-30 17:07:36 +01:00
parent b5ff0eb0e4
commit 8844f8691a
3 changed files with 440 additions and 87 deletions

View file

@ -12,6 +12,7 @@
#include <mist/timing.h>
#include <mist/procs.h>
#include <mist/stream.h>
#include <mist/defines.h>
//under cygwin, recv blocks for ~15ms if no data is available.
//This is a hack to keep performance decent with that bug present.
@ -250,9 +251,7 @@ int main(int argc, char** argv){
playing = 0;
}
if (playing == 0){
#if DEBUG >= 4
std::cerr << "Completed VoD request in MistPlayer (" << (Util::getMS() - bench) << "ms)" << std::endl;
#endif
DEBUG_MSG(DLVL_DEVEL, "Completed VoD request in MistPlayer (%d ms)", (Util::getMS() - bench));
pausemark["time"] = source.getJSON()["time"];
pausemark.sendTo(in_out);
in_out.setBlocking(true);
@ -266,12 +265,5 @@ int main(int argc, char** argv){
}
StatsSocket.close();
in_out.close();
#if DEBUG >= 5
if (Util::epoch() - lasttime < 60){
std::cerr << "MistPlayer exited (disconnect)." << std::endl;
}else{
std::cerr << "MistPlayer exited (command timeout)." << std::endl;
}
#endif
return 0;
}

View file

@ -16,32 +16,379 @@
#include <mist/http_parser.h>
#include <mist/dtsc.h>
#include <mist/mp4.h>
#include <mist/mp4_generic.h>
#include <mist/amf.h>
#include <mist/config.h>
#include <mist/stream.h>
#include <mist/timing.h>
#include <mist/defines.h>
///\brief Holds everything unique to HTTP Connectors.
namespace Connector_HTTP {
struct keyPart{
public:
bool operator < (const keyPart& rhs) const {
if (time < rhs.time){
return true;
}
if (time == rhs.time){
if (trackID < rhs.trackID){
return true;
}
}
return false;
}
long unsigned int trackID;
long unsigned int size;
long long unsigned int time;
long long unsigned int endTime;
long unsigned int index;
};
std::string DTSCMeta2MP4Header(DTSC::Meta & metaData, std::set<int> & tracks){
std::stringstream header;
//ftyp box
/// \todo fill ftyp with non hardcoded values from file
MP4::FTYP ftypBox;
ftypBox.setMajorBrand(0x6D703431);//mp41
ftypBox.setMinorVersion(0);
ftypBox.setCompatibleBrands(0x69736f6d,0);
ftypBox.setCompatibleBrands(0x69736f32,1);
ftypBox.setCompatibleBrands(0x61766331,2);
ftypBox.setCompatibleBrands(0x6D703431,3);
header << std::string(ftypBox.asBox(),ftypBox.boxedSize());
uint64_t mdatSize = 0;
//moov box
MP4::MOOV moovBox;{
//calculating longest duration
long long int fileDuration = 0;
long long int firstms = -1;
long long int lastms = -1;
for (std::set<int>::iterator it = tracks.begin(); it != tracks.end(); it++) {
if (lastms == -1 || lastms < metaData.tracks[*it].lastms){
lastms = metaData.tracks[*it].lastms;
}
if (firstms == -1 || firstms > metaData.tracks[*it].firstms){
firstms = metaData.tracks[*it].firstms;
}
}
fileDuration = lastms - firstms;
//MP4::MVHD mvhdBox(fileDuration);
MP4::MVHD mvhdBox;
mvhdBox.setVersion(0);
mvhdBox.setCreationTime(0);
mvhdBox.setModificationTime(0);
mvhdBox.setTimeScale(1000);
mvhdBox.setRate(0x10000);
mvhdBox.setDuration(fileDuration);
mvhdBox.setTrackID(0);
mvhdBox.setVolume(256);
mvhdBox.setMatrix(0x00010000,0);
mvhdBox.setMatrix(0,1);
mvhdBox.setMatrix(0,2);
mvhdBox.setMatrix(0,3);
mvhdBox.setMatrix(0x00010000,4);
mvhdBox.setMatrix(0,5);
mvhdBox.setMatrix(0,6);
mvhdBox.setMatrix(0,7);
mvhdBox.setMatrix(0x40000000,8);
moovBox.setContent(mvhdBox, 0);
}
{//start arbitrary track addition for headeri
int boxOffset = 1;
for (std::set<int>::iterator it = tracks.begin(); it != tracks.end(); it++) {
int timescale = 0;
MP4::TRAK trakBox;
{
{
MP4::TKHD tkhdBox;
tkhdBox.setVersion(0);
tkhdBox.setFlags(15);
tkhdBox.setTrackID(*it);
tkhdBox.setDuration(metaData.tracks[*it].lastms - metaData.tracks[*it].firstms);
if (metaData.tracks[*it].type == "video"){
tkhdBox.setWidth(metaData.tracks[*it].width << 16);
tkhdBox.setHeight(metaData.tracks[*it].height << 16);
tkhdBox.setVolume(0);
}else{
tkhdBox.setVolume(256);
tkhdBox.setAlternateGroup(1);
}
tkhdBox.setMatrix(0x00010000,0);
tkhdBox.setMatrix(0,1);
tkhdBox.setMatrix(0,2);
tkhdBox.setMatrix(0,3);
tkhdBox.setMatrix(0x00010000,4);
tkhdBox.setMatrix(0,5);
tkhdBox.setMatrix(0,6);
tkhdBox.setMatrix(0,7);
tkhdBox.setMatrix(0x40000000,8);
trakBox.setContent(tkhdBox, 0);
}{
MP4::MDIA mdiaBox;
{
MP4::MDHD mdhdBox(0);/// \todo fix constructor mdhd in lib
mdhdBox.setCreationTime(0);
mdhdBox.setModificationTime(0);
//Calculating media time based on sampledelta. Probably cheating, but it works...
timescale = ((double)(42 * metaData.tracks[*it].parts.size() ) / (metaData.tracks[*it].lastms - metaData.tracks[*it].firstms)) * 1000;
mdhdBox.setTimeScale(timescale);
mdhdBox.setDuration((metaData.tracks[*it].lastms - metaData.tracks[*it].firstms) * ((double)timescale / 1000));
mdiaBox.setContent(mdhdBox, 0);
}//MDHD box
{
MP4::HDLR hdlrBox;/// \todo fix constructor hdlr in lib
if (metaData.tracks[*it].type == "video"){
hdlrBox.setHandlerType(0x76696465);//vide
}else if (metaData.tracks[*it].type == "audio"){
hdlrBox.setHandlerType(0x736F756E);//soun
}
hdlrBox.setName(metaData.tracks[*it].getIdentifier());
mdiaBox.setContent(hdlrBox, 1);
}//hdlr box
{
MP4::MINF minfBox;
if (metaData.tracks[*it].type== "video"){
MP4::VMHD vmhdBox;
vmhdBox.setFlags(1);
minfBox.setContent(vmhdBox,0);
}else if (metaData.tracks[*it].type == "audio"){
MP4::SMHD smhdBox;
minfBox.setContent(smhdBox,0);
}//type box
{
MP4::DINF dinfBox;
MP4::DREF drefBox;/// \todo fix constructor dref in lib
drefBox.setVersion(0);
MP4::URL urlBox;
urlBox.setFlags(1);
drefBox.setDataEntry(urlBox,0);
dinfBox.setContent(drefBox,0);
minfBox.setContent(dinfBox,1);
}//dinf box
{
MP4::STBL stblBox;
{
MP4::STSD stsdBox;
stsdBox.setVersion(0);
if (metaData.tracks[*it].type == "video"){//boxname = codec
MP4::VisualSampleEntry vse;
if (metaData.tracks[*it].codec == "H264"){
vse.setCodec("avc1");
}
vse.setDataReferenceIndex(1);
vse.setWidth(metaData.tracks[*it].width);
vse.setHeight(metaData.tracks[*it].height);
MP4::AVCC avccBox;
avccBox.setPayload(metaData.tracks[*it].init);
vse.setCLAP(avccBox);
stsdBox.setEntry(vse,0);
}else if(metaData.tracks[*it].type == "audio"){//boxname = codec
MP4::AudioSampleEntry ase;
if (metaData.tracks[*it].codec == "AAC"){
ase.setCodec("mp4a");
ase.setDataReferenceIndex(1);
}
ase.setSampleRate(metaData.tracks[*it].rate);
ase.setChannelCount(metaData.tracks[*it].channels);
ase.setSampleSize(metaData.tracks[*it].size);
//MP4::ESDS esdsBox(metaData.tracks[*it].init, metaData.tracks[*it].bps);
MP4::ESDS esdsBox;
//outputting these values first, so malloc isn't called as often.
esdsBox.setESHeaderStartCodes(metaData.tracks[*it].init);
esdsBox.setSLValue(2);
esdsBox.setESDescriptorTypeLength(32+metaData.tracks[*it].init.size());
esdsBox.setESID(2);
esdsBox.setStreamPriority(0);
esdsBox.setDecoderConfigDescriptorTypeLength(18 + metaData.tracks[*it].init.size());
esdsBox.setByteObjectTypeID(0x40);
esdsBox.setStreamType(5);
esdsBox.setReservedFlag(1);
esdsBox.setBufferSize(1250000);
esdsBox.setMaximumBitRate(10000000);
esdsBox.setAverageBitRate(metaData.tracks[*it].bps * 8);
esdsBox.setConfigDescriptorTypeLength(5);
esdsBox.setSLConfigDescriptorTypeTag(0x6);
esdsBox.setSLConfigExtendedDescriptorTypeTag(0x808080);
esdsBox.setSLDescriptorTypeLength(1);
ase.setCodecBox(esdsBox);
stsdBox.setEntry(ase,0);
}
stblBox.setContent(stsdBox,0);
}//stsd box
/// \todo update following stts lines
{
MP4::STTS sttsBox;//current version probably causes problems
sttsBox.setVersion(0);
MP4::STTSEntry newEntry;
newEntry.sampleCount = metaData.tracks[*it].parts.size();
//42, Used as magic number for timescale calculation
newEntry.sampleDelta = 42;
sttsBox.setSTTSEntry(newEntry, 0);
stblBox.setContent(sttsBox,1);
}//stts box
if (metaData.tracks[*it].type == "video"){
//STSS Box here
MP4::STSS stssBox;
stssBox.setVersion(0);
int tmpCount = 1;
int tmpItCount = 0;
for ( std::deque< DTSC::Key>::iterator tmpIt = metaData.tracks[*it].keys.begin(); tmpIt != metaData.tracks[*it].keys.end(); tmpIt ++) {
stssBox.setSampleNumber(tmpCount,tmpItCount);
tmpCount += tmpIt->getParts();
tmpItCount ++;
}
stblBox.setContent(stssBox,2);
}//stss box
int offset = (metaData.tracks[*it].type == "video");
{
MP4::STSC stscBox;
stscBox.setVersion(0);
MP4::STSCEntry stscEntry;
stscEntry.firstChunk = 1;
stscEntry.samplesPerChunk = 1;
stscEntry.sampleDescriptionIndex = 1;
stscBox.setSTSCEntry(stscEntry, 0);
stblBox.setContent(stscBox,2 + offset);
}//stsc box
{
uint32_t total = 0;
MP4::STSZ stszBox;
stszBox.setVersion(0);
total = 0;
for (std::deque< DTSC::Part>::iterator partIt = metaData.tracks[*it].parts.begin(); partIt != metaData.tracks[*it].parts.end(); partIt ++) {
stszBox.setEntrySize(partIt->getSize(), total);//in bytes in file
total++;
}
stblBox.setContent(stszBox,3 + offset);
}//stsz box
//add STCO boxes here
{
MP4::STCO stcoBox;
stcoBox.setVersion(1);
//Inserting empty values on purpose here, will be fixed later.
if (metaData.tracks[*it].parts.size() != 0){
stcoBox.setChunkOffset(0, metaData.tracks[*it].parts.size() - 1);//this inserts all empty entries at once
}
stblBox.setContent(stcoBox,4 + offset);
}//stco box
minfBox.setContent(stblBox,2);
}//stbl box
mdiaBox.setContent(minfBox, 2);
}//minf box
trakBox.setContent(mdiaBox, 1);
}
}//trak Box
moovBox.setContent(trakBox, boxOffset);
boxOffset++;
}
}//end arbitrary track addition
//initial offset length ftyp, length moov + 8
unsigned long long int byteOffset = ftypBox.boxedSize() + moovBox.boxedSize() + 8;
//update all STCO from the following map;
std::map <int, MP4::STCO> checkStcoBoxes;
//for all tracks
for (unsigned int i = 1; i < moovBox.getContentCount(); i++){
//10 lines to get the STCO box.
MP4::TRAK checkTrakBox;
MP4::MDIA checkMdiaBox;
MP4::TKHD checkTkhdBox;
MP4::MINF checkMinfBox;
MP4::STBL checkStblBox;
//MP4::STCO checkStcoBox;
checkTrakBox = ((MP4::TRAK&)moovBox.getContent(i));
for (unsigned int j = 0; j < checkTrakBox.getContentCount(); j++){
if (checkTrakBox.getContent(j).isType("mdia")){
checkMdiaBox = ((MP4::MDIA&)checkTrakBox.getContent(j));
break;
}
if (checkTrakBox.getContent(j).isType("tkhd")){
checkTkhdBox = ((MP4::TKHD&)checkTrakBox.getContent(j));
}
}
for (unsigned int j = 0; j < checkMdiaBox.getContentCount(); j++){
if (checkMdiaBox.getContent(j).isType("minf")){
checkMinfBox = ((MP4::MINF&)checkMdiaBox.getContent(j));
break;
}
}
for (unsigned int j = 0; j < checkMinfBox.getContentCount(); j++){
if (checkMinfBox.getContent(j).isType("stbl")){
checkStblBox = ((MP4::STBL&)checkMinfBox.getContent(j));
break;
}
}
for (unsigned int j = 0; j < checkStblBox.getContentCount(); j++){
if (checkStblBox.getContent(j).isType("stco")){
checkStcoBoxes.insert( std::pair<int, MP4::STCO>(checkTkhdBox.getTrackID(), ((MP4::STCO&)checkStblBox.getContent(j)) ));
break;
}
}
}
//inserting right values in the STCO box header
//total = 0;
long long unsigned int totalByteOffset = 0;
//Current values are actual byte offset without header-sized offset
std::set <keyPart> sortSet;//filling sortset for interleaving parts
for (std::set<int>::iterator subIt = tracks.begin(); subIt != tracks.end(); subIt++) {
keyPart temp;
temp.trackID = *subIt;
temp.time = metaData.tracks[*subIt].firstms;//timeplace of frame
temp.endTime = metaData.tracks[*subIt].firstms + metaData.tracks[*subIt].parts[0].getDuration();
temp.size = metaData.tracks[*subIt].parts[0].getSize();//bytesize of frame (alle parts all together)
temp.index = 0;
sortSet.insert(temp);
}
while (!sortSet.empty()){
//setting the right STCO size in the STCO box
checkStcoBoxes[sortSet.begin()->trackID].setChunkOffset(totalByteOffset + byteOffset, sortSet.begin()->index);
totalByteOffset += sortSet.begin()->size;
//add keyPart to sortSet
keyPart temp;
temp.index = sortSet.begin()->index + 1;
temp.trackID = sortSet.begin()->trackID;
if(temp.index < metaData.tracks[temp.trackID].parts.size() ){//only insert when there are parts left
temp.time = sortSet.begin()->endTime;//timeplace of frame
temp.endTime = sortSet.begin()->endTime + metaData.tracks[temp.trackID].parts[temp.index].getDuration();
temp.size = metaData.tracks[temp.trackID].parts[temp.index].getSize();//bytesize of frame
sortSet.insert(temp);
}
//remove highest keyPart
sortSet.erase(sortSet.begin());
}
//calculating the offset where the STCO box will be in the main MOOV box
//needed for probable optimise
mdatSize = totalByteOffset;
header << std::string(moovBox.asBox(),moovBox.boxedSize());
header << (char)((mdatSize>>24) & 0x000000FF) << (char)((mdatSize>>16) & 0x000000FF) << (char)((mdatSize>>8) & 0x000000FF) << (char)(mdatSize & 0x000000FF) << "mdat";
//end of header
return header.str();
}
///\brief Main function for the HTTP Progressive Connector
///\param conn A socket describing the connection the client.
///\return The exit code of the connector.
int progressiveConnector(Socket::Connection & conn){
bool ready4data = false; //Set to true when streaming is to begin.
DTSC::Stream Strm; //Incoming stream buffer.
HTTP::Parser HTTP_R, HTTP_S;//HTTP Receiver en HTTP Sender.
bool inited = false;//Whether the stream is initialized
Socket::Connection ss( -1);//The Stream Socket, used to connect to the desired stream.
std::string streamname;//Will contain the name of the stream.
#if DEBUG >= DLVL_DEVEL
std::set <keyPart> sortSet;//filling sortset for interleaving parts
#endif
//MP4 specific variables
MP4::DTSC2MP4Converter Conv;
unsigned int lastStats = 0;//Indicates the last time that we have sent stats to the server socket.
int videoID = -1;
int audioID = -1;
while (conn.connected()){
//Only attempt to parse input when not yet init'ed.
if ( !inited){
@ -51,73 +398,72 @@ namespace Connector_HTTP {
std::cout << "Received request: " << HTTP_R.getUrl() << std::endl;
#endif
conn.setHost(HTTP_R.GetHeader("X-Origin"));
//we assume the URL is the stream name with a 3 letter extension
streamname = HTTP_R.getUrl().substr(1);
size_t extDot = streamname.rfind('.');
if (extDot != std::string::npos){
streamname.resize(extDot);
} //strip the extension
ready4data = true;
streamname = HTTP_R.GetHeader("X-Stream");
//we are ready, connect the socket!
ss = Util::Stream::getStream(streamname);
Strm.waitForMeta(ss);
int videoID = -1;
int audioID = -1;
if (HTTP_R.GetVar("audio") != ""){
audioID = JSON::Value(HTTP_R.GetVar("audio")).asInt();
}
if (HTTP_R.GetVar("video") != ""){
videoID = JSON::Value(HTTP_R.GetVar("video")).asInt();
}
for (std::map<int,DTSC::Track>::iterator it = Strm.metadata.tracks.begin(); it != Strm.metadata.tracks.end(); it++){
if (videoID == -1 && it->second.type == "video" && it->second.codec == "H264"){
videoID = it->first;
}
if (audioID == -1 && it->second.type == "audio" && it->second.codec == "AAC"){
audioID = it->first;
}
}
std::set<int> tracks;
if (videoID > 0){tracks.insert(videoID);}
if (audioID > 0){tracks.insert(audioID);}
HTTP_S.Clean(); //make sure no parts of old requests are left in any buffers
HTTP_S.SetHeader("Content-Type", "video/MP4"); //Send the correct content-type for FLV files
HTTP_S.protocol = "HTTP/1.0";
conn.SendNow(HTTP_S.BuildResponse("200", "OK")); //no SetBody = unknown length - this is intentional, we will stream the entire file
conn.SendNow(DTSCMeta2MP4Header(Strm.metadata, tracks));//SENDING MP4HEADER
HTTP_R.Clean(); //clean for any possible next requests
{//using scope to have cmd not declared after action
std::stringstream cmd;
cmd << "t";
for (std::set<int>::iterator it = tracks.begin(); it != tracks.end(); it++) {
cmd << " " << *it;
}
cmd << "\ns 0\np\n";
ss.SendNow(cmd.str());
}
#if DEBUG >= DLVL_DEVEL
for (std::set<int>::iterator subIt = tracks.begin(); subIt != tracks.end(); subIt++) {
keyPart temp;
temp.trackID = *subIt;
temp.time = Strm.metadata.tracks[*subIt].firstms;//timeplace of frame
temp.endTime = Strm.metadata.tracks[*subIt].firstms + Strm.metadata.tracks[*subIt].parts[0].getDuration();
temp.size = Strm.metadata.tracks[*subIt].parts[0].getSize();//bytesize of frame (alle parts all together)
temp.index = 0;
sortSet.insert(temp);
}
#endif
if ( !ss.connected()){
#if DEBUG >= 1
fprintf(stderr, "Could not connect to server for %s!\n", streamname.c_str());
#endif
ss.close();
HTTP_S.Clean();
HTTP_S.SetBody("No such stream is available on the system. Please try again.\n");
conn.SendNow(HTTP_S.BuildResponse("404", "Not found"));
continue;
}
inited = true;
}
}
}
if (ready4data){
if ( !inited){
//we are ready, connect the socket!
ss = Util::Stream::getStream(streamname);
Strm.waitForMeta(ss);
//build header here and set iterator
HTTP_S.Clean(); //make sure no parts of old requests are left in any buffers
HTTP_S.SetHeader("Content-Type", "video/MP4"); //Send the correct content-type for FLV files
HTTP_S.protocol = "HTTP/1.0";
conn.SendNow(HTTP_S.BuildResponse("200", "OK")); //no SetBody = unknown length - this is intentional, we will stream the entire file
conn.SendNow(Conv.DTSCMeta2MP4Header(Strm.metadata));//SENDING MP4HEADER
{//using scope to have cmd not declared after action
std::stringstream cmd;
cmd << "t 1 2";
cmd << "\ns 0";
cmd << "\np\n";
ss.SendNow(cmd.str());
}
if ( !ss.connected()){
#if DEBUG >= 1
fprintf(stderr, "Could not connect to server for %s!\n", streamname.c_str());
#endif
ss.close();
HTTP_S.Clean();
HTTP_S.SetBody("No such stream is available on the system. Please try again.\n");
conn.SendNow(HTTP_S.BuildResponse("404", "Not found"));
ready4data = false;
continue;
}
//wait until we have a header
while ( !Strm.metadata && ss.connected()){
if (ss.spool()){
Strm.parsePacket(ss.Received()); //read the metadata
}else{
Util::sleep(5);
}
}
int byterate = 0;
for (std::map<int,DTSC::Track>::iterator it = Strm.metadata.tracks.begin(); it != Strm.metadata.tracks.end(); it++){
if (videoID == -1 && it->second.type == "video"){
videoID = it->second.trackID;
}
if (audioID == -1 && it->second.type == "audio"){
audioID = it->second.trackID;
}
}
if (videoID != -1){
byterate += Strm.metadata.tracks[videoID].bps;
}
if (audioID != -1){
byterate += Strm.metadata.tracks[audioID].bps;
}
if ( !byterate){byterate = 1;}
inited = true;
}
}else{
unsigned int now = Util::epoch();
if (now != lastStats){
lastStats = now;
@ -128,18 +474,34 @@ namespace Connector_HTTP {
if (Strm.lastType() == DTSC::PAUSEMARK){
conn.close();
}else if(Strm.lastType() == DTSC::AUDIO || Strm.lastType() == DTSC::VIDEO){
//parse DTSC to MP4 here
#if DEBUG >= DLVL_DEVEL
if (!sortSet.empty()){
if (sortSet.begin()->trackID != Strm.getPacket()["trackid"].asInt() || sortSet.begin()->time != Strm.getPacket()["time"].asInt()){
DEBUG_MSG(DLVL_DEVEL, "Set[%d, %d] => Real[%d, %d]", sortSet.begin()->trackID, sortSet.begin()->time, Strm.getPacket()["trackid"].asInt(), Strm.getPacket()["time"].asInt());
}
//add keyPart to sortSet
keyPart temp;
temp.index = sortSet.begin()->index + 1;
temp.trackID = sortSet.begin()->trackID;
if(temp.index < Strm.metadata.tracks[temp.trackID].parts.size() ){//only insert when there are parts left
temp.time = sortSet.begin()->endTime;//timeplace of frame
temp.endTime = sortSet.begin()->endTime + Strm.metadata.tracks[temp.trackID].parts[temp.index].getDuration();
temp.size = Strm.metadata.tracks[temp.trackID].parts[temp.index].getSize();//bytesize of frame
sortSet.insert(temp);
}
//remove highest keyPart
sortSet.erase(sortSet.begin());
}
#endif
conn.SendNow(Strm.lastData());//send out and clear Converter buffer
}
if (Strm.lastType() == DTSC::INVALID){
#if DEBUG >= 3
fprintf(stderr, "Invalid packet received - closing connection.\n");
#endif
DEBUG_MSG(DLVL_FAIL, "Invalid packet received - closing connection");
conn.close();
}
}
}else{
Util::sleep(1);
Util::sleep(10);
}
if ( !ss.connected()){
break;

View file

@ -125,7 +125,6 @@ namespace Converters{
//if we are in the vicinity of a new keyframe
if (trackData[sNum].idHeader.parseGranuleUpper(trackData[sNum].lastGran) != trackData[sNum].idHeader.parseGranuleUpper(temp)){
//try to mark right
long long unsigned int temper = trackData[sNum].idHeader.parseGranuleUpper(temp) - trackData[sNum].idHeader.parseGranuleUpper(trackData[sNum].lastGran);
DTSCOut["keyframe"] = 1;
trackData[sNum].lastGran = temp;
}else{