mp4parser库

功能介绍

https://github.com/sannies/mp4parser

Java MP4 Parser是一个读取和写入MP4容器的java api。直接操作容器而不是对音视频进行编解码。

功能&＃xff1a;

• MP4parser的典型功能如下&＃xff1a;
• 混合音频视频到MP4文件中
• 合并同样编码设置的MP4文件
• 增加或者改变MP4文件的metadata
• 通过省略帧的方式分割MP4文件

例子采用的音频编码格式是H264和AAC&＃xff0c;这两种格式对于MP4文件来说非常常见。当然也有AC-3格式的&＃xff0c;以及并不常用的H263/MPEG-2视频轨道。

不能把两个编码格式不同的MP4文件进行合并。

项目使用

项目集成

在gradle中添加依赖

compile &＃39;com.googlecode.mp4parser:isoparser:1.1.21&＃39;


视频合并

File sdDir;if (Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)) {sdDir &＃61; Environment.getExternalStorageDirectory();}else{sdDir &＃61; Environment.getDataDirectory().getParentFile();}String sdpath &＃61; sdDir.getAbsolutePath();//获取指定图片路径String v0 &＃61; sdpath &＃43; File.separator &＃43; "1.mp4";String v1 &＃61; sdpath &＃43; File.separator &＃43; "2.mp4";final ArrayList strings &＃61; new ArrayList<>();strings.add(v0);strings.add(v1);final File mergeVideoFile &＃61; new File(sdpath &＃43; File.separator &＃43; "merge.mp4");findViewById(R.id.tv_1).setOnClickListener(new View.OnClickListener() {&＃64;Overridepublic void onClick(View view) {String s &＃61; Mp4ParserUtils.mergeVideo(strings, mergeVideoFile);Toast.makeText(Mp4PaserActivity.this, "合并成功" &＃43; s, Toast.LENGTH_LONG).show();}});

视频分割

final double [] times &＃61; {0,3}; //剪切1~3秒final String srcVideoPath &＃61; sdpath &＃43; File.separator &＃43; "merge.mp4";final String resVideoPath &＃61; sdpath &＃43; File.separator;findViewById(R.id.tv_2).setOnClickListener(new View.OnClickListener() {&＃64;Overridepublic void onClick(View view) {try {Mp4ParserUtils.cutVideo(srcVideoPath, resVideoPath, times);Toast.makeText(Mp4PaserActivity.this, "剪切成功", Toast.LENGTH_LONG).show();} catch (IOException e) {}}});


工具类

package com.dianping.test;import android.content.Context;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** &＃64;param videoList* &＃64;param mergeVideoFile* &＃64;return*/public static String mergeVideo(ArrayList videoList, File mergeVideoFile) {FileOutputStream fos &＃61; null;FileChannel fc &＃61; null;try {List sourceMovies &＃61; new ArrayList<>();for (String video : videoList) {sourceMovies.add(MovieCreator.build(video));}List videoTracks &＃61; new LinkedList<>();List audioTracks &＃61; 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 &＃61; 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 &＃61; new DefaultMp4Builder().build(mergeMovie);fos &＃61; new FileOutputStream(mergeVideoFile);fc &＃61; fos.getChannel();out.writeContainer(fc);fc.close();fos.close();return mergeVideoFile.getAbsolutePath();} catch (Exception e) {e.printStackTrace();} finally {if (fc !&＃61; null) {try {fc.close();} catch (IOException e) {e.printStackTrace();}}if (fos !&＃61; null) {try {fos.close();} catch (IOException e) {e.printStackTrace();}}}return null;}/*** 剪切视频* &＃64;param srcVideoPath* &＃64;param dstVideoPath* &＃64;param times* &＃64;throws IOException*/public static void cutVideo(String srcVideoPath, String dstVideoPath, double[] times) throws IOException {int dstVideoNumber &＃61; times.length / 2;String[] dstVideoPathes &＃61; new String[dstVideoNumber];for (int i &＃61; 0; i "cutOutput-" &＃43; i &＃43; ".mp4";}int timesCount &＃61; 0;for (int idst &＃61; 0; idst //Movie movie &＃61; new MovieCreator().build(new RandomAccessFile("/home/sannies/suckerpunch-distantplanet_h1080p/suckerpunch-distantplanet_h1080p.mov", "r").getChannel());Movie movie &＃61; MovieCreator.build(srcVideoPath);List tracks &＃61; movie.getTracks();movie.setTracks(new LinkedList());// remove all tracks we will create new tracks from the olddouble startTime1 &＃61; times[timesCount];double endTime1 &＃61; times[timesCount &＃43; 1];timesCount &＃61; timesCount &＃43; 2;boolean timeCorrected &＃61; 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 framefor (Track track : tracks) {if (track.getSyncSamples() !&＃61; 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 &＃61; correctTimeToSyncSample(track, startTime1, false);endTime1 &＃61; correctTimeToSyncSample(track, endTime1, true);timeCorrected &＃61; true;}}for (Track track : tracks) {long currentSample &＃61; 0;double currentTime &＃61; 0;double lastTime &＃61; -1;long startSample1 &＃61; -1;long endSample1 &＃61; -1;for (int i &＃61; 0; i long delta &＃61; track.getSampleDurations()[i];if (currentTime > lastTime && currentTime <&＃61; startTime1) {// current sample is still before the new starttimestartSample1 &＃61; currentSample;}if (currentTime > lastTime && currentTime <&＃61; endTime1) {// current sample is after the new start time and still before the new endtimeendSample1 &＃61; currentSample;}lastTime &＃61; currentTime;currentTime &＃43;&＃61; (double) delta / (double) track.getTrackMetaData().getTimescale();currentSample&＃43;&＃43;;}//movie.addTrack(new AppendTrack(new ClippedTrack(track, startSample1, endSample1), new ClippedTrack(track, startSample2, endSample2)));movie.addTrack(new CroppedTrack(track, startSample1, endSample1));}long start1 &＃61; System.currentTimeMillis();Container out &＃61; new DefaultMp4Builder().build(movie);long start2 &＃61; System.currentTimeMillis();FileOutputStream fos &＃61; new FileOutputStream(String.format(dstVideoPathes[idst]));FileChannel fc &＃61; fos.getChannel();out.writeContainer(fc);fc.close();fos.close();long start3 &＃61; System.currentTimeMillis();}}private static double correctTimeToSyncSample(Track track, double cutHere, boolean next) {double[] timeOfSyncSamples &＃61; new double[track.getSyncSamples().length];long currentSample &＃61; 0;double currentTime &＃61; 0;for (int i &＃61; 0; i long delta &＃61; track.getSampleDurations()[i];if (Arrays.binarySearch(track.getSyncSamples(), currentSample &＃43; 1) >&＃61; 0) {// samples always start with 1 but we start with zero therefore &＃43;1timeOfSyncSamples[Arrays.binarySearch(track.getSyncSamples(), currentSample &＃43; 1)] &＃61; currentTime;}currentTime &＃43;&＃61; (double) delta / (double) track.getTrackMetaData().getTimescale();currentSample&＃43;&＃43;;}double previous &＃61; 0;for (double timeOfSyncSample : timeOfSyncSamples) {if (timeOfSyncSample > cutHere) {if (next) {return timeOfSyncSample;} else {return previous;}}previous &＃61; timeOfSyncSample;}return timeOfSyncSamples[timeOfSyncSamples.length - 1];}}


局限性

只支持MP4文件
经过尝试对于一些MP4文件分割不了
功能比较少
目前点评有采用这种方案做视频的合并