升级版！使用JavaCV进行视频转码指南
最编程
2024-08-03 18:28:12
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package com.videotest;
import java.io.File;
import java.nio.file.FileAlreadyExistsException;
import java.nio.file.Files;
import java.nio.file.StandardCopyOption;
import org.bytedeco.ffmpeg.global.avcodec;
import org.bytedeco.javacv.FFmpegFrameGrabber;
import org.bytedeco.javacv.FFmpegFrameRecorder;
import org.bytedeco.javacv.Frame;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Video {
private static final Logger logger = LoggerFactory.getLogger(Video.class);
private static final String DEFAULT_EXTNAME = "mp4";
private static final String DEFAULT_FORMAT = "mov,mp4,m4a,3gp,3g2,mj2";
private VideoFormat videoFormat;
public Video (String absolutePath) {
this(new File(absolutePath));
}
public Video (String parent, String fileName) {
this(new File(parent, fileName));
}
public Video (File file) {
VideoFormat videoFormat = new VideoFormat();
FFmpegFrameGrabber frameGrabber = null;
try {
videoFormat.setExists(file.exists());
videoFormat.setFile(file.isFile());
videoFormat.setAbsolutePath(file.getAbsolutePath());
videoFormat.setParent(file.getParent());
videoFormat.setName(file.getName());
if (!file.isFile()) {
return;
}
int dotLastIndex = videoFormat.getName().lastIndexOf(".");
if (dotLastIndex > 0 && dotLastIndex < videoFormat.getName().length() - 1) {
videoFormat.setSimpleName(videoFormat.getName().substring(0, dotLastIndex));
videoFormat.setExtName(videoFormat.getName().substring(dotLastIndex + 1));
} else {
videoFormat.setSimpleName(videoFormat.getName());
}
frameGrabber = FFmpegFrameGrabber.createDefault(file);
frameGrabber.start();
videoFormat.setVideoCodec(frameGrabber.getVideoCodec());
videoFormat.setAudioCodec(frameGrabber.getAudioCodec());
videoFormat.setFormat(frameGrabber.getFormat());
} catch (Exception e) {
logger.warn(file.getAbsolutePath() + " -> error", e);
} finally {
if (frameGrabber != null) {
try {
frameGrabber.close();
} catch (org.bytedeco.javacv.FrameGrabber.Exception e) {
logger.warn("frameGrabber.close异常", e);
}
}
}
this.videoFormat = videoFormat;
}
protected VideoFormat getVideoFormat() {
return videoFormat;
}
public boolean isVideo () {
return this.getVideoFormat().getVideoCodec() != avcodec.AV_CODEC_ID_NONE;
}
protected boolean hasAudio () {
return this.getVideoFormat().getAudioCodec() != avcodec.AV_CODEC_ID_NONE;
}
protected boolean isMp4 () {
return DEFAULT_EXTNAME.equalsIgnoreCase(this.getVideoFormat().getExtName());
}
protected boolean canPlayInH5IgnoreExtName () {
if (!this.isVideo()) {
return false;
}
VideoFormat videoFormat = this.videoFormat;
if (this.hasAudio() && videoFormat.getAudioCodec() != avcodec.AV_CODEC_ID_AAC) {
return false;
}
if (videoFormat.getVideoCodec() != avcodec.AV_CODEC_ID_H264) {
return false;
}
if (!DEFAULT_FORMAT.equals(videoFormat.getFormat())) {
return false;
}
return true;
}
public boolean canPlayInH5 () {
if (!this.isMp4()) {
return false;
}
return this.canPlayInH5IgnoreExtName();
}
public String convert2Mp4 () throws Exception {
return this.convert2Mp4(this.videoFormat.getParent());
}
/**
*
* @param outputParent 输出目录
* @return 输出文件的绝对路径
* @throws Exception
*/
public String convert2Mp4 (String outputParent) throws Exception {
VideoFormat videoFormat = this.videoFormat;
if (!this.isVideo()) {
throw new org.bytedeco.javacv.FrameGrabber.Exception("[" + videoFormat.getAbsolutePath() + "] 不是视频文件");
}
File outfile = new File(outputParent);
if (outfile.isFile()) {
throw new FileAlreadyExistsException("[" + outputParent + "] 是文件并且已存在");
}
if (!outfile.exists()) {
outfile.mkdirs();
}
String outFilePath = new File(outputParent, videoFormat.getSimpleName() + "_recode." + DEFAULT_EXTNAME).getAbsolutePath();
outFilePath = outFilePath.replace("\\", "/");
//如果视频本来就能在浏览器中播放，则只进行复制
if (this.canPlayInH5IgnoreExtName()) {
Files.copy(new File(videoFormat.getParent(), videoFormat.getName()).toPath(), new File(outFilePath).toPath(), StandardCopyOption.REPLACE_EXISTING);
return outFilePath;
}
FFmpegFrameGrabber frameGrabber = FFmpegFrameGrabber.createDefault(new File(videoFormat.getParent(), videoFormat.getName()));
Frame captured_frame = null;
FFmpegFrameRecorder recorder = null;
try {
frameGrabber.start();
recorder = new FFmpegFrameRecorder(outFilePath, frameGrabber.getImageWidth(), frameGrabber.getImageHeight(), frameGrabber.getAudioChannels());
recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
recorder.setFormat(DEFAULT_EXTNAME);
recorder.setFrameRate(frameGrabber.getFrameRate());
recorder.setVideoBitrate(frameGrabber.getVideoBitrate());
recorder.setAspectRatio(frameGrabber.getAspectRatio());
recorder.setAudioOptions(frameGrabber.getAudioOptions());
recorder.setSampleRate(frameGrabber.getSampleRate());
recorder.setAudioCodec(avcodec.AV_CODEC_ID_AAC);
recorder.start();
while (true) {
captured_frame = frameGrabber.grabFrame();
if (captured_frame == null) {
logger.info(outFilePath + "转码完成");
break;
}
recorder.record(captured_frame);
}
} finally {
if (recorder != null) {
try {
recorder.close();
} catch (Exception e) {
logger.warn("recorder.close异常", e);
}
}
try {
frameGrabber.close();
} catch (org.bytedeco.javacv.FrameGrabber.Exception e) {
logger.warn("frameGrabber.close异常", e);
}
}
return outFilePath;
}
}
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