视频大文件压缩
参考文档: https://blog.csdn.net/weixin_41023230/article/details/109113449
1.压缩方法:
/** * 传视频File对象,返回压缩后File对象信息 * @param source */ public static File compressionVideo(File source,String picName) { if(source == null){ return null; } String newPath = source.getAbsolutePath().substring(0, source.getAbsolutePath().lastIndexOf(File.separator)).concat(File.separator).concat(picName); File target = new File(newPath); try { MultimediaObject object = new MultimediaObject(source); AudioInfo audioInfo = object.getInfo().getAudio(); // 根据视频大小来判断是否需要进行压缩, int maxSize = 5; double mb = Math.ceil(source.length()/ 1048576); int second = (int)object.getInfo().getDuration()/1000; BigDecimal bd = new BigDecimal(String.format("%.4f", mb/second)); System.out.println("开始压缩视频了--> 视频每秒平均 "+ bd +" MB "); // 视频 > 5MB, 或者每秒 > 0.5 MB 才做压缩, 不需要的话可以把判断去掉 boolean temp = mb > maxSize || bd.compareTo(new BigDecimal(0.5)) > 0; long time = System.currentTimeMillis(); //TODO 视频属性设置 int maxBitRate = 128000;// 比特率 int maxSamplingRate = 44100;// 音频采样频率 int bitRate = 800000;// 比特率 int maxFrameRate = 20; int maxWidth = 1280; AudioAttributes audio = new AudioAttributes(); // 设置通用编码格式10 audio.setCodec("aac"); // 设置最大值:比特率越高,清晰度/音质越好 // 设置音频比特率,单位:b (比特率越高,清晰度/音质越好,当然文件也就越大 128000 = 182kb) if(audioInfo.getBitRate() > maxBitRate){ audio.setBitRate(new Integer(maxBitRate)); } // 设置重新编码的音频流中使用的声道数(1 =单声道,2 = 双声道(立体声))。如果未设置任何声道值,则编码器将选择默认值 0。 audio.setChannels(audioInfo.getChannels()); // 采样率越高声音的还原度越好,文件越大 // 设置音频采样率,单位:赫兹 hz // 设置编码时候的音量值,未设置为0,如果256,则音量值不会改变 // audio.setVolume(256); if(audioInfo.getSamplingRate() > maxSamplingRate){ audio.setSamplingRate(maxSamplingRate); } //TODO 视频编码属性配置 ws.schild.jave.info.VideoInfo videoInfo = object.getInfo().getVideo(); VideoAttributes video = new VideoAttributes(); video.setCodec("h264"); //设置音频比特率,单位:b (比特率越高,清晰度/音质越好,当然文件也就越大 800000 = 800kb) if(videoInfo.getBitRate() > bitRate){ video.setBitRate(bitRate); } // 视频帧率:15 f / s 帧率越低,效果越差 // 设置视频帧率(帧率越低,视频会出现断层,越高让人感觉越连续),视频帧率(Frame rate)是用于测量显示帧数的量度。所谓的测量单位为每秒显示帧数(Frames per Second,简:FPS)或“赫兹”(Hz)。 if(videoInfo.getFrameRate() > maxFrameRate){ video.setFrameRate(maxFrameRate); } // 限制视频宽高 int width = videoInfo.getSize().getWidth(); int height = videoInfo.getSize().getHeight(); if(width > maxWidth){ float rat = (float) width / maxWidth; video.setSize(new VideoSize(maxWidth,(int)(height/rat))); } EncodingAttributes attr = new EncodingAttributes(); attr.setAudioAttributes(audio); attr.setVideoAttributes(video); // 设置线程数 attr.setEncodingThreads(Runtime.getRuntime().availableProcessors()/2); Encoder encoder = new Encoder(); encoder.encode(new MultimediaObject(source), target, attr); System.out.println("压缩总耗时:" + (System.currentTimeMillis() - time)/1000); return target; } catch (Exception e) { e.printStackTrace(); }finally { if(target.length() > 0){ source.delete(); } } return source; }
2.测试方法
public static void main(String[] args) { // 压缩前文件路径 File source = new File("C:/Users/linlo/Documents/万兴神剪手/Output/我的视频.mp4"); // 压缩后的文件路径 String picName = "new.mp4"; File file = compressionVideo(source, picName); }
3.引包
import ws.schild.jave.Encoder; import ws.schild.jave.MultimediaObject; import ws.schild.jave.encode.AudioAttributes; import ws.schild.jave.encode.EncodingAttributes; import ws.schild.jave.encode.VideoAttributes; import ws.schild.jave.info.AudioInfo; import ws.schild.jave.info.VideoSize; import java.io.*; import java.math.BigDecimal;
4.引入依赖
<dependency> <groupId>ws.schild</groupId> <artifactId>jave-core</artifactId> <version>3.0.0</version> </dependency> <dependency> <groupId>ws.schild</groupId> <artifactId>jave-nativebin-win64</artifactId> <version>3.0.0</version> </dependency>
5.测试结果