因为是基于 JAVE 项目的修改，而 JAVE 是依赖 ffmpeg 所以可以适用于所有 ffmpeg 所支持的文件格式的转换。具体可以查看 JAVE 官方文档
<dependency>
<groupId>com.github.vip-zpf</groupId>
<artifactId>jave</artifactId>
<version>1.1.4</version>
</dependency>- 初始化时判断当前运行环境，将bin目录中对应的 ffmpeg 可执行文件拷贝到临时目录中
- 根据文件类型及配置通过 Runtime.getRuntime().exec(cmd) 执行 ffmpeg 对应的转码命令
ffmpeg 是依赖运行环境的，JAVE 项目封装了ffmpeg，它通过上述的原理使 java 可以调用ffmpeg而且支持跨平台。
- 项目老旧没再维护。官网最近版本是2009年发布的，其依赖的ffmpeg早已过时，很多情况下用不了。
- 转码一直报异常 EncoderException: Stream mapping
- 没有发布maven仓库，而且 JAVE 本身也不是一个maven项目
- 不支持mac
本项目为解决上述问题而生。
- 这是一个maven项目
- 项目依赖的 ffmpeg 可执行文件经过验证可以使用（单元测试中提供了一个简单的检验方法）
- 支持 Linux/Windows/Mac 平台
如果程序无法通过拷贝资源文件的方式获取到 ffmpeg 的可执行文件或者内置的 ffmpeg 不支持你所使用的操作系统
你可以通过环境变量或者在 java 中设置 System.setProperty("ffmpeg.home", "ffmpeg可执行文件所在的目录") 的方式指定你的系统中安装的可用的 ffmpeg 文件的目录
如 System.setProperty("ffmpeg.home", "/usr/local/bin/")
- 获取音视频信息
File mp3Target = new File("target/test-classes/material/testAudio14.wav");
Encoder encoder = new Encoder();
try {
MultimediaInfo info = encoder.getInfo(mp3Target);
AudioInfo audio = info.getAudio();
int samplingRate = audio.getSamplingRate();
System.out.println(samplingRate);
} catch (EncoderException e) {
e.printStackTrace();
}
- 剪切音频
File source = new File("target/test-classes/material/longAudio.mp3");
File mp3Target = new File("target/test-classes/material/testAudio14.mp3");
AudioUtils.cutAndConvert(source, mp3Target, "mp3", "00:00:08", "00:00:10");
- 音频转换格式
File source = new File("target/test-classes/material/longAudio.mp3");
File wavTarget = new File("testAudio.wav");
AudioUtils.amrToWav(source, wavTarget);
- 多段音频合并
File source1 = new File("target/test-classes/material/sunwukong.mp3");
File source2 = new File("target/test-classes/material/luban.mp3");
File source3 = new File("target/test-classes/material/lvbu.wav");
File source4 = new File("target/test-classes/material/diaochan.mp3");
File source5 = new File("target/test-classes/material/direnjie.mp3");
File targetSource = new File("target/test-classes/material/wangzherongyao.wav");
AudioUtils.mergeAudio(Arrays.asList(source1, source2,source3,source4,source5), targetSource, null);
- 音频倍速播放
File source = new File("target/test-classes/material/longAudio.mp3");
File target = new File("target/test-classes/material/longAudio-atempo.mp3");
AudioUtils.audioAtempo(source, target, 2.0);
- 音频音量调整一（不用滤镜方式）
File source = new File("target/test-classes/material/longAudio.mp3");
File target = new File("target/test-classes/material/longAudio-vol.mp3");
AudioAttributes audioAttributes = new AudioAttributes();
audioAttributes.setVol(1000);
EncodingAttributes encodingAttributes = new EncodingAttributes();
encodingAttributes.setAudioAttributes(audioAttributes);
AudioUtils.operate(source, target, encodingAttributes);
- 音频音量调整二（滤镜方式-有损增加音量）
File source = new File("target/test-classes/material/longAudio.mp3");
File target = new File("target/test-classes/material/longAudio-volume.mp3");
AudioAttributes audioAttributes = new AudioAttributes();
audioAttributes.setAf_volume("2");
EncodingAttributes encodingAttributes = new EncodingAttributes();
encodingAttributes.setAudioAttributes(audioAttributes);
AudioUtils.operate(source, target, encodingAttributes);
- 音频音量调整三（滤镜方式-无损增加音量）
File source = new File("target/test-classes/material/longAudio.mp3");
File target = new File("target/test-classes/material/longAudio-volume-db.mp3");
AudioAttributes audioAttributes = new AudioAttributes();
audioAttributes.setAf_volume("5dB");
EncodingAttributes encodingAttributes = new EncodingAttributes();
encodingAttributes.setAudioAttributes(audioAttributes);
AudioUtils.operate(source, target, encodingAttributes);
- 获取音频 分贝信息
//注意：
//音频的分贝为负数是正常的，感兴趣的可以了解一下分贝的计算方法(log10，对电流等属性运算后的值取的数)
//其中越接近于0的，播放音量越大
File source = new File("target/test-classes/material/diaochan.mp3");
File target = new File("/dev/null");
AudioAttributes audioAttributes = new AudioAttributes();
audioAttributes.setFilterComplex("volumedetect");
Encoder encoder = new Encoder();
MultimediaInfo multimediaInfo = null;
try {
multimediaInfo = encoder.getInfo(source, target, null, audioAttributes, "null");
} catch (EncoderException e) {
throw new RuntimeException(e);
}
AudioInfo audio = multimediaInfo.getAudio();
VolumedetectInfo volumedetect = audio.getVolumedetect();
//平均分贝
String meanVolume = volumedetect.getMeanVolume();
//最大分贝
String maxVolume = volumedetect.getMaxVolume();
//音频分贝分布情况
Map<String, String> histogramMap = volumedetect.getHistogramMap();
- 获取音频 波形图
File source = new File("target/test-classes/material/diaochan.mp3");
File target = new File("target/test-classes/material/diaochan.png");
AudioAttributes audioAttributes = new AudioAttributes();
audioAttributes.setFilterComplex("showwavespic=s=640x120");
EncodingAttributes encodingAttributes = new EncodingAttributes();
encodingAttributes.setAudioAttributes(audioAttributes);
Encoder encoder = new Encoder();
AudioUtils.operate(source, target, encodingAttributes);
- 视频转图片
File source = new File("target/test-classes/material/testVideo.avi");
File target = new File("target/test-classes/material/image/image-%3d.jpeg");
VideoUtils.thumbnail(source, target, null);
- 抽取视频中的音频
File source = new File("target/test-classes/material/testVideo.avi");
File target = new File("target/test-classes/material/target.wav");
VideoUtils.getVoideoAudio(source, target, null);
- 无损-合并多段视频
//1、如果第一个视频没有声音，那么合并后的视频也是没有声音的
//2、必须保证所有视频的格式，分辨率都一样，不然结果不可控
File source1 = new File("target/test-classes/material/girl.mp4");
File source2 = new File("target/test-classes/material/man.mp4");
File source3 = new File("target/test-classes/material/face.mp4");
File target = new File("target/test-classes/material/aaa.mp4");
String data = new StringBuffer().
append("file '").append(source1.getAbsolutePath()).append("'").append(System.getProperty("line.separator")).
append("file '").append(source2.getAbsolutePath()).append("'").append(System.getProperty("line.separator")).
append("file '").append(source3.getAbsolutePath()).append("'").append(System.getProperty("line.separator")).
toString();
File mergeVideoTxt = new File("target/test-classes/material/", "mergeVideo.txt");
FileUtils.writeStringToFile(mergeVideoTxt, data, "UTF-8", false);
VideoUtils.mergeVideoByLossless(mergeVideoTxt, target, "mp4");
- 有损-合并多段视频 （注意：合并后的文件格式是mkv）
File source1 = new File("target/test-classes/material/girl.mp4");
File source2 = new File("target/test-classes/material/man.mp4");
File source3 = new File("target/test-classes/material/girl.mp4");
File target = new File("target/test-classes/material/bbb.mkv");
LinkedList<File> files = new LinkedList<>();
files.add(source1);
files.add(source2);
files.add(source3);
VideoUtils.mergeVideoByDamaging(files, target, "mp4");
- 视频中插入音频（视频原本无音频）
File source1 = new File("target/test-classes/material/face.mp4");
File source2 = new File("target/test-classes/material/wangzherongyao.wav");
File target = new File("target/test-classes/material/videoAndAudio.mp4");
LinkedList<File> files = new LinkedList<>();
files.add(source1);
files.add(source2);
VideoUtils.mergeVoideoAndAudioByInsert(files, target, null);
- 替换视频中的音频
File source1 = new File("target/test-classes/material/girl.mp4");
File source2 = new File("target/test-classes/material/wangzherongyao.wav");
File target = new File("target/test-classes/material/videoAndAudio2.mp4");
LinkedList<File> files = new LinkedList<>();
files.add(source1);
files.add(source2);
VideoUtils.mergeVoideoAndAudioByReplace(files, target, "mp4");
- 旋转视频 一
//ps: "transpose=1" 顺时针旋转画面90度
//ps: "transpose=2" 逆时针旋转画面90度
//ps: "transpose=3" 顺时针旋转画面90度再水平翻转
//ps: "transpose=0" 逆时针旋转画面90度再水平翻转
//ps: hflip 水平翻转视频画面
//ps: vflip 垂直翻转视频画面
File source = new File("target/test-classes/material/girl.mp4");
File target = new File("target/test-classes/material/girlRoate.mp4");
VideoUtils.roateVideo(source, target, "transpose=1");
- 旋转视频 二
File source = new File("target/test-classes/material/girl.mp4");
File target = new File("target/test-classes/material/girlRoate.mp4");
VideoUtils.roateVideoByMetadata(source, target, "rotate=90");
- webm转mp4 一
File source = new File("target/test-classes/material/abc.webm");
File target = new File("target/test-classes/material/webm2MP4.mp4");
VideoUtils.webm2mp4(source, target, "2000k","2000k","2500k");
- webm转mp4 二
File source = new File("target/test-classes/material/abc.webm");
File target = new File("target/test-classes/material/webm2MP4.mp4");
VideoUtils.webm2mp4(source, target, null, null);
- 视频加速播放（不包含音频）
File source = new File("target/test-classes/material/girl.mp4");
File target = new File("target/test-classes/material/girl-pts.mp4");
VideoAttributes videoAttributes = new VideoAttributes();
videoAttributes.setSetpts("0.25");
EncodingAttributes attrs = new EncodingAttributes();
attrs.setVideoAttributes(videoAttributes);
VideoUtils.getVoideoAudio(source, target, attrs);
- 音视频同时加速播放
File source = new File("target/test-classes/material/girl.mp4");
File target = new File("target/test-classes/material/12345.mp4");
EncodingAttributes attrs = new EncodingAttributes();
VideoAttributes videoAttributes = new VideoAttributes();
videoAttributes.setSetpts("0.5");
AudioAttributes audioAttributes = new AudioAttributes();
audioAttributes.setAf_Atempo("2");
attrs.setVideoAttributes(videoAttributes);
attrs.setAudioAttributes(audioAttributes);
VideoUtils.getVoideoAudio(source, target, attrs);
借鉴 JAVE 的代码
本工具使用 dadiyang/jave 源码改造而来
JAVE 项目是基于 GPL 协议的开源项目，本项目是在 JAVE 的基础上进行修改和增强，因此也采用 GPL 协议开源。
JAVE is Free Software and it is licensed under GPL.