java 视频处理获取时长，截取帧数，类型转换

所需要的jar

1、mov 视频转码为 mp4
   compile group: 'ws.schild', name: 'jave-core', version: '2.7.1'
   compile group: 'ws.schild', name: 'jave-nativebin-linux64', version: '2.7.1'
   compile group: 'ws.schild', name: 'jave-nativebin-win64', version: '2.7.1'

2、获取时长、截取帧数

compile group: 'org.bytedeco', name: 'javacv', version: '1.3.1'
compile group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg-platform', version: '3.2.1-1.3'

/**
	 * 作者： 王彦宝
	 * 时间： 2019年6月27日上午10:48:58
	 * 描述：截取视频上传第10帧
	 * @param file
	 * @param framefile
	 * @throws Exception 
	 * void
	 */
	public long fetchFrame(String file, String framefile)
	        throws Exception {
		long start = System.currentTimeMillis();
	    int select = 10;
	    long duration = 0L;
	    FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(file);
	    grabber.start();
	    int length = grabber.getLengthInFrames();
	    duration = grabber.getLengthInTime() / (1000 * 1000);// 获取时长 
	    int index = 1;
	    Frame frame = null;
	    while (index <= length) {
	        frame = grabber.grabImage();
	        if (index >= select) {
	            break;
	        }
	        index++;
	    }
	    Java2DFrameConverter converter = new Java2DFrameConverter();
	    BufferedImage bi = converter.getBufferedImage(frame);
	    ImageIO.write(bi, "jpg", new File(framefile));
	    grabber.stop();
	    System.out.println(System.currentTimeMillis() - start);
	    return duration;
	}


//视频转码  sourcePath 视频来源 targetPath  目标地址  
private void movToMp4(String sourcePath, String targetPath) {
		File source = new File(sourcePath);
		File target = new File(targetPath);
		AudioAttributes audio = new AudioAttributes();
		audio.setCodec("aac");
		VideoAttributes video = new VideoAttributes();
		video.setCodec("h264");
		video.setBitRate(new Integer(2325 * 1024));
		EncodingAttributes attrs = new EncodingAttributes();
		attrs.setFormat("mp4");
		attrs.setAudioAttributes(audio);
		attrs.setVideoAttributes(video);
		Encoder encoder = new Encoder();
		try {
			encoder.encode(new MultimediaObject(source), target, attrs);
		} catch (IllegalArgumentException | EncoderException e) {
			e.printStackTrace();
		}
		
	}

3、图片压缩jar

compile group: 'net.coobird', name: 'thumbnailator', version: '0.4.8'

/**
	 * 作者： 王彦宝
	 * 描述： 图片压缩返回字节数组
	 * @param inputStream
	 * @param width
	 * @param height
	 * @param newFName
	 * @return 
	 * byte[]
	 */
	public byte[] resize(InputStream inputStream, int width, int height, String newFName) {
		byte[] bt = null;
		try {
				ByteArrayOutputStream out = new ByteArrayOutputStream();
				Thumbnails.of(inputStream).width(width).outputQuality(0.9).toOutputStream(out);
				bt = out.toByteArray();
		} catch (Exception e1) {
			logger.info("filesUpload:" + e1.getMessage());
		}
		return bt;
	}
	/**
	 * 作者： 王彦宝
	 * 描述：图片压缩并裁剪返回字节数组
	 * @param inputStream
	 * @param width
	 * @param height
	 * @return 
	 * byte[]
	 */
	public byte[] resize2(ByteArrayInputStream inputStream, int width, int height) {
		byte[] bt = null;
		try {
			BufferedImage image = ImageIO.read(inputStream);
			Builder<BufferedImage> builder = null;
			ByteArrayOutputStream out = new ByteArrayOutputStream();
			int imageWidth = image.getWidth();
			int imageHeitht = image.getHeight();
			if ((float)height / width != (float)imageWidth / imageHeitht) {
				inputStream.reset();
				if (imageWidth > imageHeitht) {
					image = Thumbnails.of(inputStream).height(height).asBufferedImage();
				} else {
					image = Thumbnails.of(inputStream).width(width).asBufferedImage();
				}
				builder = Thumbnails.of(image).sourceRegion(Positions.CENTER, width, height).size(width, height);
			} else {
				builder = Thumbnails.of(image).size(width, height);
			}
			builder.outputQuality(0.95f).outputFormat("jpg").toOutputStream(out);
			bt = out.toByteArray();
		} catch (Exception e1) {
			logger.info("filesUpload:" + e1.getMessage());
		}
		return bt;
	}

来源：oschina

链接：https://my.oschina.net/u/3267498/blog/3197352

标签

Thumbnailator

JAVE

ffmpeg

javacpp

javacv