视音频转码

使用到了软件 ffmpeg

package com.hisign.apm.common;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import java.io.BufferedReader;
import java.io.File;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.concurrent.*;

/**
 * @description: 视频转音频
 * @author: cyy
 * @create: 2021-08-04 11:18
 */
@Slf4j
@Component
public class VideoToAudio {

	private ExecutorService pool = Executors.newCachedThreadPool();

	// 要输出的音频格式
	private static String outputFormat;

	// ffmpeg 安装路径
	private static String toolPath;

	@Value("${ffmpeg.outputFormat}")
	public void setOutputFormat(String outputFormat) {
		VideoToAudio.outputFormat = outputFormat;
	}

	@Value("${ffmpeg.toolPath}")
	public void setToolPath(String toolPath) {
		VideoToAudio.toolPath = toolPath;
	}
	//	private  String toolPath = "/Users/cuiyueyang/Documents/tool/ffmpeg-4.4";

	/**
	 * 获得转化后的文件名
	 *
	 * @param sourceFilePath : 源视频文件路径
	 * @return
	 */
	public String getNewFileName(String sourceFilePath) {
		File source = new File(sourceFilePath);
		String fileName = source.getName().substring(0, source.getName().lastIndexOf("."));
		return fileName + "." + outputFormat;
	}

	public String getNewFilePath(String sourceFilePath) {
		return sourceFilePath.substring(0, sourceFilePath.lastIndexOf("."))
				+ "." + outputFormat;
	}

	public String transformForOneFolder(String sourcePath) {
		String targetPath = getNewFilePath(sourcePath);
		transform(sourcePath, targetPath);
		return targetPath;
	}

	/**
	 * 转化音频格式
	 *
	 * @param sourcePath : 源视频文件路径
	 * @param targetPath : 目标音频文件路径
	 * @return
	 */
	public void transform(String sourcePath, String targetPath) {
		try {

			long start = System.currentTimeMillis();
			//转换
			String command = toolPath + "/ffmpeg -i " + sourcePath + " -acodec " + outputFormat + " -vn " + targetPath;
			log.info("转换命令：{}", command);
			int n = execCommand(command, 100000);
			if (n == 0) {
				long end = System.currentTimeMillis();
				log.info(sourcePath + " 转换成功, 耗时:" + (end - start) + "ms");
			}

		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public int execCommand(String command, long timeout) {
		Process process = null;
		Future<Integer> executeFuture = null;
		StringBuffer sb = new StringBuffer();
		try {
			process = Runtime.getRuntime().exec(command);
			//获取进程的标准输入流
			final InputStream is = process.getInputStream();
			BufferedReader reader = new BufferedReader(new InputStreamReader(is));
			String line;
			while ((line = reader.readLine()) != null) {
				System.out.println(line);
			}

			final Process p = process;
			Callable<Integer> call = new Callable<Integer>() {
				@Override
				public Integer call() throws Exception {

					p.waitFor();
					return p.exitValue();
				}
			};

			//使用线程池防止Process阻塞
			executeFuture = pool.submit(call);
			log.info("转换输出: {}", sb.toString());
			return executeFuture.get(timeout, TimeUnit.MILLISECONDS);

		} catch (Exception e) {
			log.error("execCommand 执行命令失败,command:{}，错误原因:{}", command,
					e.getMessage());
			return 1;
		} finally {
			log.info("转换结束");
			if (executeFuture != null) {
				try {
					executeFuture.cancel(true);
				} catch (Exception ignore) {
				}
			}
			if (process != null) {
				process.destroy();
			}
		}

	}


	/**
	 * 批量转化音频格式
	 *
	 * @param sourceFolderPath : 源视频文件夹路径
	 * @param targetFolderPath : 目标音乐文件夹路径
	 * @return
	 */
	public void batchTransform(String sourceFolderPath, String targetFolderPath) {
		File sourceFolder = new File(sourceFolderPath);
		if (sourceFolder.list().length != 0) {
			Arrays.asList(sourceFolder.list()).forEach(e -> {
				transform(sourceFolderPath + "/" + e, targetFolderPath + "/" + getNewFileName(e));
			});
		}
	}

	public static void main(String[] args) {
		toolPath = "/Users/cuiyueyang/Documents/tool/ffmpeg-4.4";
		outputFormat = "mp3";
		VideoToAudio videoToAudio = new VideoToAudio();
		String a = videoToAudio.transformForOneFolder("/Users/cuiyueyang/Downloads/temp/video/1.mp4");
		System.out.println(a);
//		videoToAudio.batchTransform("/Users/cuiyueyang/Downloads/temp/video", "/Users/cuiyueyang/Downloads/temp/audio");
	}

}