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

package com.example.demo;

import com.coremedia.iso.boxes.Container;

import com.googlecode.mp4parser.authoring.Movie;

import com.googlecode.mp4parser.authoring.Track;

import com.googlecode.mp4parser.authoring.builder.DefaultMp4Builder;

import com.googlecode.mp4parser.authoring.container.mp4.MovieCreator;

import com.googlecode.mp4parser.authoring.tracks.AppendTrack;

import com.googlecode.mp4parser.authoring.tracks.CroppedTrack;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.nio.channels.FileChannel;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.LinkedList;

import java.util.List;

public class Mp4ParserUtils {

/**

* 合并视频

*

* @param videoList: 所有视频地址集合

* @param mergeVideoFile: 目标文件

* @return

*/

public static String mergeVideo(List videoList, File mergeVideoFile) {

FileOutputStream fos = null;

FileChannel fc = null;

try {

List sourceMovies = new ArrayList<>();

for (String video : videoList) {

sourceMovies.add(MovieCreator.build(video));

}

List videoTracks = new LinkedList<>();

List audioTracks = new LinkedList<>();

for (Movie movie : sourceMovies) {

for (Track track : movie.getTracks()) {

if ("soun".equals(track.getHandler())) {

audioTracks.add(track);

}

if ("vide".equals(track.getHandler())) {

videoTracks.add(track);

}

}

}

Movie mergeMovie = new Movie();

if (audioTracks.size() > 0) {

mergeMovie.addTrack(new AppendTrack(audioTracks.toArray(new Track[audioTracks.size()])));

}

if (videoTracks.size() > 0) {

mergeMovie.addTrack(new AppendTrack(videoTracks.toArray(new Track[videoTracks.size()])));

}

Container out = new DefaultMp4Builder().build(mergeMovie);

fos = new FileOutputStream(mergeVideoFile);

fc = fos.getChannel();

out.writeContainer(fc);

fc.close();

fos.close();

return mergeVideoFile.getAbsolutePath();

} catch (Exception e) {

e.printStackTrace();

} finally {

if (fc != null) {

try {

fc.close();

} catch (IOException e) {

e.printStackTrace();

}

}

if (fos != null) {

try {

fos.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

return null;

}

/**

* 剪切视频

* @param srcVideoPath

* @param dstVideoPath

* @param times

* @throws IOException

*/

public static void cutVideo(String srcVideoPath, String dstVideoPath, double[] times) throws IOException {

int dstVideoNumber = times.length / 2;

String[] dstVideoPathes = new String[dstVideoNumber];

for (int i = 0; i < dstVideoNumber; i++) {

dstVideoPathes[i] = dstVideoPath + "cutOutput-" + i + ".mp4";

}

int timesCount = 0;

for (int idst = 0; idst < dstVideoPathes.length; idst++) {

//Movie movie = new MovieCreator().build(new RandomAccessFile("/home/sannies/suckerpunch-distantplanet_h1080p/suckerpunch-distantplanet_h1080p.mov", "r").getChannel());

Movie movie = MovieCreator.build(srcVideoPath);

List tracks = movie.getTracks();

movie.setTracks(new LinkedList());

// remove all tracks we will create new tracks from the old

double startTime1 = times[timesCount];

double endTime1 = times[timesCount + 1];

timesCount = timesCount + 2;

boolean timeCorrected = false;

// Here we try to find a track that has sync samples. Since we can only start decoding

// at such a sample we SHOULD make sure that the start of the new fragment is exactly

// such a frame

for (Track track : tracks) {

if (track.getSyncSamples() != null && track.getSyncSamples().length > 0) {

if (timeCorrected) {

// This exception here could be a false positive in case we have multiple tracks

// with sync samples at exactly the same positions. E.g. a single movie containing

// multiple qualities of the same video (Microsoft Smooth Streaming file)

throw new RuntimeException("The startTime has already been corrected by another track with SyncSample. Not Supported.");

}

startTime1 = correctTimeToSyncSample(track, startTime1, false);

endTime1 = correctTimeToSyncSample(track, endTime1, true);

timeCorrected = true;

}

}

for (Track track : tracks) {

long currentSample = 0;

double currentTime = 0;

double lastTime = -1;

long startSample1 = -1;

long endSample1 = -1;

for (int i = 0; i < track.getSampleDurations().length; i++) {

long delta = track.getSampleDurations()[i];

if (currentTime > lastTime && currentTime <= startTime1) {

// current sample is still before the new starttime

startSample1 = currentSample;

}

if (currentTime > lastTime && currentTime <= endTime1) {

// current sample is after the new start time and still before the new endtime

endSample1 = currentSample;

}

lastTime = currentTime;

currentTime += (double) delta / (double) track.getTrackMetaData().getTimescale();

currentSample++;

}

//movie.addTrack(new AppendTrack(new ClippedTrack(track, startSample1, endSample1), new ClippedTrack(track, startSample2, endSample2)));

movie.addTrack(new CroppedTrack(track, startSample1, endSample1));

}

long start1 = System.currentTimeMillis();

Container out = new DefaultMp4Builder().build(movie);

long start2 = System.currentTimeMillis();

FileOutputStream fos = new FileOutputStream(String.format(dstVideoPathes[idst]));

FileChannel fc = fos.getChannel();

out.writeContainer(fc);

fc.close();

fos.close();

long start3 = System.currentTimeMillis();

}

}

private static double correctTimeToSyncSample(Track track, double cutHere, boolean next) {

double[] timeOfSyncSamples = new double[track.getSyncSamples().length];

long currentSample = 0;

double currentTime = 0;

for (int i = 0; i < track.getSampleDurations().length; i++) {

long delta = track.getSampleDurations()[i];

if (Arrays.binarySearch(track.getSyncSamples(), currentSample + 1) >= 0) {

// samples always start with 1 but we start with zero therefore +1

timeOfSyncSamples[Arrays.binarySearch(track.getSyncSamples(), currentSample + 1)] = currentTime;

}

currentTime += (double) delta / (double) track.getTrackMetaData().getTimescale();

currentSample++;

}

double previous = 0;

for (double timeOfSyncSample : timeOfSyncSamples) {

if (timeOfSyncSample > cutHere) {

if (next) {

return timeOfSyncSample;

} else {

return previous;

}

}

previous = timeOfSyncSample;

}

return timeOfSyncSamples[timeOfSyncSamples.length - 1];

}

}

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