用到的maven依赖：

lombok依赖就不贴出来了

  <dependency><groupId>org.bytedeco</groupId><artifactId>ffmpeg-platform</artifactId><version>4.3.2-1.5.5</version></dependency><dependency><groupId>org.apache.commons</groupId><artifactId>commons-lang3</artifactId><version>3.12.0</version></dependency><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.5.2</version></dependency>

工具类：

import cn.hutool.core.io.IoUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.bytedeco.ffmpeg.avcodec.AVCodec;
import org.bytedeco.ffmpeg.avcodec.AVCodecContext;
import org.bytedeco.ffmpeg.avformat.AVFormatContext;
import org.bytedeco.ffmpeg.global.avcodec;
import org.bytedeco.ffmpeg.global.avformat;
import org.bytedeco.ffmpeg.global.avutil;
import org.bytedeco.javacpp.Loader;
import org.bytedeco.javacpp.PointerPointer;import java.io.*;
import java.util.concurrent.TimeUnit;@Slf4j
public class VideoUtils {static class LazyFfmpeg {private static final String ffmpeg = Loader.load(org.bytedeco.ffmpeg.ffmpeg.class);}public static String ffmpeg() {return LazyFfmpeg.ffmpeg;}/*** 压缩视频* @param inputFilePath 压缩前视频地址* @param outputFilePath 压缩后视频地址*/public static void compressVideo(String inputFilePath, String outputFilePath) {if (StringUtils.isAnyBlank(inputFilePath, outputFilePath)) {throw new RuntimeException("输入视频路径或输出视频文件路径不能为空");}if (StringUtils.equals(inputFilePath, outputFilePath)) {throw new RuntimeException("outputFilePath不能和inputFilePath相同");}validIsFile(new File(inputFilePath));ProcessBuilder processBuilder = new ProcessBuilder(ffmpeg(),"-y",                     // 自动覆盖输出文件"-i", inputFilePath,      // 输入文件路径"-crf","30","-c:v","h264","-preset", "slow",            // 使用较慢的预设来提高压缩效率
//                "-b:v", "1000",  // 设置视频比特率为 1000 kbps
//                "-vf", String.format("scale=%s:%s", 1920, 1080),
//                "-c:a", "copy",           // 保持音频编码不变"-c:a", "aac",                  // 使用 AAC 音频编码"-b:a", "2k",                 // 设置音频比特率为 128 kbpsoutputFilePath            // 输出文件路径);StringBuilder stringBuilder = new StringBuilder();int exitCode;try {Process process = processBuilder.start();// 捕获错误输出processErrorMsg(process, stringBuilder);// 等待 FFmpeg 进程完成exitCode = process.waitFor();} catch (Throwable e) {throw new RuntimeException(e);}if (exitCode != 0) {throw new RuntimeException(stringBuilder.toString());}}/*** 提取图片** @param videoPath 视频路径* @param second    提取指定时间图片* @param timeout   等待的最长时间* @param unit      参数的时间 timeout 单位* @return 图片*/public static byte[] ffmpegExtractImage(String videoPath, Number second, long timeout, TimeUnit unit) {if (timeout <= 0) {throw new IllegalArgumentException("timeout不能小于等于0");}if (second == null) {second = 0;}if (unit == null) {unit = TimeUnit.MINUTES;}File videoFile = new File(videoPath);validIsFile(videoFile);ProcessBuilder extractBuilder = new ProcessBuilder(ffmpeg(),"-ss", second.toString(),"-i", videoPath,"-f", "image2pipe","-vframes", "1",
//                "-vcodec", "png",//如果觉得照片不清晰，就启用此选项，但是照片会变大"-");try {Process process = extractBuilder.start();try (InputStream inputStream = process.getInputStream()) {byte[] bytes = IoUtil.readBytes(inputStream);boolean result = process.waitFor(timeout, unit);if (!result) {throw new RuntimeException("子进程退出之前已超过等待时间");}return bytes;}} catch (IOException | InterruptedException e) {throw new RuntimeException(e);}}/*** 获取视频分辨率** @param videoFilePath 视频路径*/public static int[] getVideoResolution(String videoFilePath) {validIsFile(new File(videoFilePath));AVFormatContext formatContext = avformat.avformat_alloc_context();AVCodecContext codecContext = avcodec.avcodec_alloc_context3(null);// 打开视频文件if (avformat.avformat_open_input(formatContext, videoFilePath, null, null) != 0) {throw new RuntimeException("无法打开视频文件");}// 获取视频流信息if (avformat.avformat_find_stream_info(formatContext, (PointerPointer) null) < 0) {throw new RuntimeException("无法获取视频流信息");}// 查找视频流int videoStreamIndex = -1;for (int i = 0; i < formatContext.nb_streams(); i++) {if (formatContext.streams(i).codecpar().codec_type() == avutil.AVMEDIA_TYPE_VIDEO) {videoStreamIndex = i;break;}}if (videoStreamIndex == -1) {throw new RuntimeException("视频流未找到");}// 获取视频解码器上下文avcodec.avcodec_parameters_to_context(codecContext, formatContext.streams(videoStreamIndex).codecpar());// 查找解码器AVCodec codec = avcodec.avcodec_find_decoder(codecContext.codec_id());if (codec == null) {throw new RuntimeException("无法找到解码器");}// 打开解码器if (avcodec.avcodec_open2(codecContext, codec, (PointerPointer) null) < 0) {throw new RuntimeException("无法打开解码器");}// 获取视频分辨率int width = codecContext.width();int height = codecContext.height();// 清理资源codecContext.close();return new int[]{width, height};}private static void processErrorMsg(Process process, StringBuilder stringBuilder) {new Thread(() -> {try (BufferedReader reader = new BufferedReader(new InputStreamReader(process.getErrorStream()))) {String line;while ((line = reader.readLine()) != null) {stringBuilder.append(line);}} catch (IOException e) {log.error("打印命令行错误日志出现异常  errMsg:{}", e.getMessage(), e);}}).start();}public static void validIsFile(File file) {validExists(file);if (!file.isFile()) {throw new IllegalArgumentException("不是文件");}}public static void validExists(File file) {if (!file.exists()) {throw new IllegalArgumentException("videoPath不存在");}}
}