Java 合并多个MP4视频文件

2023-07-11 11:09:02 70

局限性

只支持MP4文件
经过尝试对于一些MP4文件分割不了

依赖




com.googlecode.mp4parser
isoparser
1.1.22

工具类

packagecom.example.demo;


importcom.coremedia.iso.boxes.Container;
importcom.googlecode.mp4parser.authoring.Movie;
importcom.googlecode.mp4parser.authoring.Track;
importcom.googlecode.mp4parser.authoring.builder.DefaultMp4Builder;
importcom.googlecode.mp4parser.authoring.container.mp4.MovieCreator;
importcom.googlecode.mp4parser.authoring.tracks.AppendTrack;
importcom.googlecode.mp4parser.authoring.tracks.CroppedTrack;

importjava.io.File;
importjava.io.FileOutputStream;
importjava.io.IOException;
importjava.nio.channels.FileChannel;
importjava.util.ArrayList;
importjava.util.Arrays;
importjava.util.LinkedList;
importjava.util.List;

publicclassMp4ParserUtils{
/**
*合并视频
*
*@paramvideoList:所有视频地址集合
*@parammergeVideoFile:目标文件
*@return
*/
publicstaticStringmergeVideo(ListvideoList,FilemergeVideoFile){
FileOutputStreamfos=null;
FileChannelfc=null;
try{
ListsourceMovies=newArrayList<>();
for(Stringvideo:videoList){
sourceMovies.add(MovieCreator.build(video));
}

ListvideoTracks=newLinkedList<>();
ListaudioTracks=newLinkedList<>();

for(Moviemovie:sourceMovies){
for(Tracktrack:movie.getTracks()){
if("soun".equals(track.getHandler())){
audioTracks.add(track);
}

if("vide".equals(track.getHandler())){
videoTracks.add(track);
}
}
}

MoviemergeMovie=newMovie();
if(audioTracks.size()>0){
mergeMovie.addTrack(newAppendTrack(audioTracks.toArray(newTrack[audioTracks.size()])));
}

if(videoTracks.size()>0){
mergeMovie.addTrack(newAppendTrack(videoTracks.toArray(newTrack[videoTracks.size()])));
}

Containerout=newDefaultMp4Builder().build(mergeMovie);
fos=newFileOutputStream(mergeVideoFile);
fc=fos.getChannel();
out.writeContainer(fc);
fc.close();
fos.close();
returnmergeVideoFile.getAbsolutePath();
}catch(Exceptione){
e.printStackTrace();
}finally{
if(fc!=null){
try{
fc.close();
}catch(IOExceptione){
e.printStackTrace();
}
}

if(fos!=null){
try{
fos.close();
}catch(IOExceptione){
e.printStackTrace();
}
}
}

returnnull;
}

/**
*剪切视频
*@paramsrcVideoPath
*@paramdstVideoPath
*@paramtimes
*@throwsIOException
*/
publicstaticvoidcutVideo(StringsrcVideoPath,StringdstVideoPath,double[]times)throwsIOException{
intdstVideoNumber=times.length/2;
String[]dstVideoPathes=newString[dstVideoNumber];
for(inti=0;itracks=movie.getTracks();
movie.setTracks(newLinkedList());
//removealltrackswewillcreatenewtracksfromtheold


doublestartTime1=times[timesCount];
doubleendTime1=times[timesCount+1];
timesCount=timesCount+2;

booleantimeCorrected=false;

//Herewetrytofindatrackthathassyncsamples.Sincewecanonlystartdecoding
//atsuchasampleweSHOULDmakesurethatthestartofthenewfragmentisexactly
//suchaframe
for(Tracktrack:tracks){
if(track.getSyncSamples()!=null&&track.getSyncSamples().length>0){
if(timeCorrected){
//Thisexceptionherecouldbeafalsepositiveincasewehavemultipletracks
//withsyncsamplesatexactlythesamepositions.E.g.asinglemoviecontaining
//multiplequalitiesofthesamevideo(MicrosoftSmoothStreamingfile)

thrownewRuntimeException("ThestartTimehasalreadybeencorrectedbyanothertrackwithSyncSample.NotSupported.");
}
startTime1=correctTimeToSyncSample(track,startTime1,false);
endTime1=correctTimeToSyncSample(track,endTime1,true);

timeCorrected=true;
}
}

for(Tracktrack:tracks){
longcurrentSample=0;
doublecurrentTime=0;
doublelastTime=-1;
longstartSample1=-1;
longendSample1=-1;


for(inti=0;ilastTime&¤tTime<=startTime1){
//currentsampleisstillbeforethenewstarttime
startSample1=currentSample;
}
if(currentTime>lastTime&¤tTime<=endTime1){
//currentsampleisafterthenewstarttimeandstillbeforethenewendtime
endSample1=currentSample;
}

lastTime=currentTime;
currentTime+=(double)delta/(double)track.getTrackMetaData().getTimescale();
currentSample++;
}
//movie.addTrack(newAppendTrack(newClippedTrack(track,startSample1,endSample1),newClippedTrack(track,startSample2,endSample2)));
movie.addTrack(newCroppedTrack(track,startSample1,endSample1));
}
longstart1=System.currentTimeMillis();
Containerout=newDefaultMp4Builder().build(movie);
longstart2=System.currentTimeMillis();
FileOutputStreamfos=newFileOutputStream(String.format(dstVideoPathes[idst]));
FileChannelfc=fos.getChannel();
out.writeContainer(fc);

fc.close();
fos.close();
longstart3=System.currentTimeMillis();

}
}

privatestaticdoublecorrectTimeToSyncSample(Tracktrack,doublecutHere,booleannext){
double[]timeOfSyncSamples=newdouble[track.getSyncSamples().length];
longcurrentSample=0;
doublecurrentTime=0;
for(inti=0;i=0){
//samplesalwaysstartwith1butwestartwithzerotherefore+1
timeOfSyncSamples[Arrays.binarySearch(track.getSyncSamples(),currentSample+1)]=currentTime;
}
currentTime+=(double)delta/(double)track.getTrackMetaData().getTimescale();
currentSample++;

}
doubleprevious=0;
for(doubletimeOfSyncSample:timeOfSyncSamples){
if(timeOfSyncSample>cutHere){
if(next){
returntimeOfSyncSample;
}else{
returnprevious;
}
}
previous=timeOfSyncSample;
}
returntimeOfSyncSamples[timeOfSyncSamples.length-1];
}

}

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Java 合并多个MP4视频文件

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