package com.crayon2f.ffmpeg;
import java.io.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
/**
* @author zc
* @date 2023/8/23
* @apiNote
*/
public class VideoUtils {
static String command = "$0 -ss $1 -t $2 -i $3 -vcodec copy -acodec copy $4";
public static void main(String[] args) {
//缩放倍数
int zoom = 5;
//视频截取时间
int minute = 5;
//ffmepg工具地址
String ffmpegPath = "D:/视频压缩/ffmpeg-git-full_v5.1.2/ffmpeg/bin/ffmpeg.exe";
//输出存放基础地址
String outputPath = "D:/视频压缩/待压缩视频";
//原文件所在文件夹
List<String> fileList = getFileList(outputPath);
for (int i = 0; i < fileList.size(); i++) {
createSubVideo(ffmpegPath, fileList.get(i).replaceAll("\\\\", "/"), outputPath, zoom, minute);
}
}
public static void createSubVideo(String ffmpegPath, String inputPath, String outputPath, int zoom, int minute) {
boolean result = VideoUtils.convertVideoResolution(inputPath, outputPath + zoom + "倍缩放/", ffmpegPath, zoom);
if (result) {
String[] inputPathArray = inputPath.split("/", -1);
// 剪辑后的视频文件路径
String videoTargetFilePath = outputPath.split("\\)", -1)[0] + "前" + minute + "分钟";
outputPath = outputPath + zoom + "倍缩放/" + inputPathArray[inputPathArray.length - 1].split("\\.")[0] + "(" + zoom + "倍缩放).mp4";
// 剪辑前的视频源文件路径
String videoResourceFilePath = outputPath;
// 剪辑开始时间点
String startTime = "00:00:00";
// 剪辑视频总时长
String durationTime = "00:0" + minute + ":00";
//调用方法
createSubVideo(ffmpegPath, videoResourceFilePath, videoTargetFilePath, startTime, durationTime);
}
}
/**
* 视频分辨率按倍数缩放
*
* @param inputPath 输入视频路径
* @param ffmpegPath ffmpeg地址
* @param Zoom 缩放倍数
* @return
*/
public static boolean convertVideoResolution(String inputPath, String outputPath, String ffmpegPath, int Zoom) {
File file = new File(outputPath);
if (!file.exists() && !file.isDirectory()) {
file.mkdir();
}
//拼接cmd命令语句
StringBuffer buffer = new StringBuffer();
buffer.append(ffmpegPath);
//注意要保留单词之间有空格
buffer.append(" -i ");
buffer.append(inputPath);
//执行命令语句并返回执行结果
String definition = null;
try {
Process process = Runtime.getRuntime().exec(buffer.toString());
InputStream in = process.getErrorStream();
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String line;
while ((line = br.readLine()) != null) {
if (line.trim().startsWith("Duration:")) {
//根据字符匹配进行切割
System.out.println("视频时间 = " + line.trim().substring(0, line.trim().indexOf(",")));
}
//一般包含fps的行就包含分辨率
if (line.contains("fps")) {
//根据
definition = line.split(",")[2];
definition = definition.trim().split(" ")[0];
System.out.println("分辨率 = " + definition);
}
}
} catch (Exception e) {
e.printStackTrace();
}
if (definition == null) {
throw new RuntimeException("视频分辨率获取失败！文件地址：" + inputPath);
}
if ("bt709".equals(definition)) {
definition = "1920x1080";
}
String[] resolutions = definition.split("x");
int width = Integer.parseInt(resolutions[0]) / Zoom;
int height = Integer.parseInt(resolutions[1]) / Zoom;
String resolution = width + "x" + height;
String[] inputPathArray = inputPath.split("/", -1);
outputPath = outputPath + inputPathArray[inputPathArray.length - 1].split("\\.")[0] + "(" + Zoom + "倍缩放).mp4";
List<String> command = new ArrayList<>();
command.add("ffmpeg");
command.add("-i");
command.add(inputPath);
command.add("-vf");
command.add("scale=" + resolution);
command.add("-c:a");
command.add("copy");
command.add(outputPath);
try {
ProcessBuilder builder = new ProcessBuilder(command);
Process process = builder.start();
InputStream stderr = process.getErrorStream();
InputStreamReader isr = new InputStreamReader(stderr);
BufferedReader br = new BufferedReader(isr);
String line;
while ((line = br.readLine()) != null) {
System.out.println("缩放::" + outputPath + "::::::" + line);
}
int exitCode = process.waitFor();
return exitCode == 0;
} catch (IOException | InterruptedException e) {
e.printStackTrace();
}
return true;
}
/**
* 截取视频
*
* @param ffmpegPath ffmpeg地址
* @param videoResourceFilePath 源文件地址
* @param videoTargetFilePath 目标文件地址
* @param startTime 开始时间
* @param endTime 结束时间
* @return
*/
public static String createSubVideo(String ffmpegPath, String videoResourceFilePath, String
videoTargetFilePath, String startTime, String endTime) {
File file = new File(videoTargetFilePath);
if (!file.exists() && !file.isDirectory()) {
file.mkdir();
}
videoTargetFilePath = videoTargetFilePath + "/" + videoResourceFilePath.split("/")[videoResourceFilePath.split("/").length - 1];
String str = command.replace("$0", ffmpegPath).replace("$1", startTime).replace("$2", endTime)
.replace("$3", videoResourceFilePath).replace("$4", videoTargetFilePath);
Runtime runtime = Runtime.getRuntime();
try {
Process proce = runtime.exec(str);
//处理结果信息Start
BufferedReader br = new BufferedReader(new InputStreamReader(proce.getErrorStream()));
String line = null;
while ((line = br.readLine()) != null) {
System.out.println("截取::" + videoTargetFilePath + ":::::::::" + line);
}
//处理结果信息Start
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
* 获取视频文件列表
*
* @param dir
* @return
*/
public static List<String> getFileList(String dir) {
List<String> listFile = new ArrayList<>();
File dirFile = new File(dir);
//如果不是目录文件，则直接返回
if (dirFile.isDirectory()) {
//获得文件夹下的文件列表，然后根据文件类型分别处理
File[] files = dirFile.listFiles();
if (null != files && files.length > 0) {
//根据时间排序
Arrays.sort(files, new Comparator<File>() {
public int compare(File f1, File f2) {
return (int) (f1.lastModified() - f2.lastModified());
}
public boolean equals(Object obj) {
return true;
}
});
for (File file : files) {
//如果不是目录，直接添加
if (!file.isDirectory()) {
listFile.add(file.getAbsolutePath());
} else {
listFile.addAll(getFileList(file.getAbsolutePath()));
}
}
}
}
return listFile;
}
}
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