用到的maven依赖：
lombok依赖就不贴出来了
java
<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：
java
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 kbps
outputFilePath // 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");
}
}
}