java 转码%2f%_java实现视频转码

最新推荐文章于 2024-02-23 15:52:19 发布

北風胡馬

最新推荐文章于 2024-02-23 15:52:19 发布

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文章标签： java 转码%2f%

本文链接：https://blog.youkuaiyun.com/weixin_36076151/article/details/111905768

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该博客介绍了一个Java编写的视频转码工具类，主要功能是将不同格式的视频转换为指定格式。通过检查文件类型，使用ffmpeg或mencoder进行转码，支持avi、mpg、wmv等格式，并提供了转换时间的计算方法。

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packagecom.gcsoft.pyas.sysbase.utils;importcom.gcsoft.pyas.AppProperties;importorg.slf4j.Logger;importorg.slf4j.LoggerFactory;importorg.springframework.beans.factory.annotation.Autowired;importorg.springframework.stereotype.Component;importjava.io.File;importjava.io.IOException;importjava.io.InputStream;importjava.util.ArrayList;importjava.util.List;importjava.util.UUID;/*** 视频转码工具类

*@authorjwc*/@Componentpublic classConverVideoUtils {

@AutowiredprivateAppProperties appProperties;protected final Logger logger = LoggerFactory.getLogger(this.getClass());/*** 转换视频格式

*@paramsourceVideoPath 视频地址

*@return

publicString beginConver(String sourceVideoPath) {//转码格式

String targetExtension =appProperties.getVideoFormat();//是否删除原文件

Boolean isDeleteResult =appProperties.getIsDeleteResult();

File fi= newFile(sourceVideoPath);

String fileName=fi.getName();//文件名不带扩展名

String fileRealName = fileName.substring(0, fileName.lastIndexOf("."));

logger.info("接收到文件(" + sourceVideoPath + ")需要转换");if (!checkfile(sourceVideoPath)) {

logger.error(sourceVideoPath+ "文件不存在" + " ");return "";

}long beginTime =System.currentTimeMillis();

logger.info("开始转文件(" + sourceVideoPath + ")");

String path=process(fileRealName, sourceVideoPath, targetExtension, isDeleteResult);if(StringUtil.isNotEmpty(path)) {

logger.info("转换成功");long endTime =System.currentTimeMillis();long timeCha = (endTime -beginTime);

String totalTime=sumTime(timeCha);

logger.info("转换视频格式共用了:" + totalTime + " ");if(isDeleteResult) {

deleteFile(sourceVideoPath);

}returnpath;

}else{return "";

}

}/*** 实际转换视频格式的方法

*@paramfileRealName 文件名不带扩展名

*@paramsourceVideoPath 原文件地址

*@paramtargetExtension 目标视频扩展名

*@paramisDeleteResult 转换完成后是否删除源文件

*@return

private String process(String fileRealName, String sourceVideoPath, String targetExtension, booleanisDeleteResult) {int type =checkContentType(sourceVideoPath);

String path= "";if (type == 0) {//如果type为0用ffmpeg直接转换

path =processVideoFormat(sourceVideoPath, fileRealName, targetExtension, isDeleteResult);

}else if (type == 1) {//如果type为1，将其他文件先转换为avi，然后在用ffmpeg转换为指定格式

String aviFilePath =processAVI(fileRealName, sourceVideoPath);if (aviFilePath == null) {//avi文件没有得到

return "";

}else{

logger.info("开始转换:");

path=processVideoFormat(aviFilePath, fileRealName, targetExtension, isDeleteResult);if(isDeleteResult) {

deleteFile(aviFilePath);

}

}returnpath;

}/*** 检查文件类型

*@paramsourceVideoPath 原文件地址

*@return

private intcheckContentType(String sourceVideoPath) {

String type= sourceVideoPath.substring(sourceVideoPath.lastIndexOf(".") + 1).toLowerCase();//ffmpeg能解析的格式：(asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等)

if (type.equals("avi")) {return 0;

}else if (type.equals("mpg")) {return 0;

}else if (type.equals("wmv")) {return 0;

}else if (type.equals("3gp")) {return 0;

}else if (type.equals("mov")) {return 0;

}else if (type.equals("mp4")) {return 0;

}else if (type.equals("asf")) {return 0;

}else if (type.equals("asx")) {return 0;

}else if (type.equals("flv")) {return 0;

}//对ffmpeg无法解析的文件格式(wmv9，rm，rmvb等),//可以先用别的工具(mencoder)转换为avi(ffmpeg能解析的)格式.

else if (type.equals("wmv9")) {return 1;

}else if (type.equals("rm")) {return 1;

}else if (type.equals("rmvb")) {return 1;

}return 9;

}/*** 检查文件是否存在

*@parampath 文件地址

*@return

private booleancheckfile(String path) {

File file= newFile(path);if (!file.isFile()) {return false;

}else{return true;

}

}/*** 对ffmpeg无法解析的文件格式(wmv9，rm，rmvb等), 可以先用别的工具(mencoder)转换为avi(ffmpeg能解析的)格式.

*@paramfileRealName 文件名不带扩展名

*@paramsourceVideoPath 原文件地址

*@return

privateString processAVI(String fileRealName, String sourceVideoPath) {/*** mencoder.exe的地址*/String menCoderPath=appProperties.getMencoderPath();/*** 转码后的存放视频地址 avi格式*/String videoFolder=appProperties.getUploadAndFormatPath();

List commend = new java.util.ArrayList<>();

commend.add(menCoderPath);

commend.add(sourceVideoPath);

commend.add("-oac");

commend.add("mp3lame");

commend.add("-lameopts");

commend.add("preset=64");

commend.add("-ovc");

commend.add("xvid");

commend.add("-xvidencopts");

commend.add("bitrate=600");

commend.add("-of");

commend.add("avi");

commend.add("-o");

commend.add(videoFolder+ fileRealName + ".avi");try{

ProcessBuilder builder= newProcessBuilder();

builder.command(commend);

Process p=builder.start();

doWaitFor(p);return videoFolder + fileRealName + ".avi";

}catch(Exception e) {

e.printStackTrace();return null;

}

}/*** 转换为指定格式

* ffmpeg能解析的格式：(asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等)

*@paramoldFilePath 源文件地址

*@paramfileRealName 文件名不带扩展名

*@paramtargetExtension 目标格式扩展名 .xxx

*@return

privateString processVideoFormat(String oldFilePath, String fileRealName, String targetExtension, Boolean isDeleteResult) {/*** ffmpeg.exe的地址*/String ffmpegPath=appProperties.getFfmpegPath();/*** 转码后的存放视频地址 mp4格式*/String targetFolder=appProperties.getUploadAndFormatPath();if (!checkfile(oldFilePath)) {

logger.error(oldFilePath+ "文件不存在");return "";

}

List commend = new ArrayList<>();

commend.add(ffmpegPath);

commend.add("-i");

commend.add(oldFilePath);

commend.add("-vcodec");

commend.add("mpeg4");

commend.add("-q");

commend.add("0");

commend.add("-y");

commend.add(targetFolder+ fileRealName +targetExtension);try{

ProcessBuilder builder= newProcessBuilder();

builder.command(commend);

Process p=builder.start();

doWaitFor(p);

p.destroy();

String videoPath= targetFolder + fileRealName +targetExtension;

String path= this.processVideoFormatH264(videoPath, ffmpegPath, targetFolder, targetExtension, isDeleteResult);returnpath;

}catch(Exception e) {

e.printStackTrace();return "";

}

}/*** 将mpeg4转为h264编码为了支持播放器

*@parampath

*@paramffmpegPath

*@return

privateString processVideoFormatH264(String path, String ffmpegPath, String targetFolder, String targetExtension, Boolean isDeleteResult) {if (!checkfile(path)) {

logger.error(path+ "文件不存在");return "";

}

String newFilePath= targetFolder + UUID.randomUUID().toString() +targetExtension;

List commend = new ArrayList<>();

commend.add(ffmpegPath);

commend.add("-i");

commend.add(path);

commend.add("-vcodec");

commend.add("h264");

commend.add("-q");

commend.add("0");

commend.add("-y");

commend.add(newFilePath);try{

ProcessBuilder builder= newProcessBuilder();

builder.command(commend);

Process p=builder.start();

doWaitFor(p);

p.destroy();if(isDeleteResult) {

deleteFile(path);

}returnnewFilePath;

}catch(Exception e) {

e.printStackTrace();return "";

}

}public intdoWaitFor(Process p) {

InputStream in= null;

InputStream err= null;int exitValue = -1;try{

in=p.getInputStream();

err=p.getErrorStream();boolean finished = false;while (!finished) {try{while (in.available() > 0) {

in.read();

}while (err.available() > 0) {

err.read();

}

exitValue=p.exitValue();

finished= true;

}catch(IllegalThreadStateException e) {

Thread.sleep(500);

}

}catch(Exception e) {

logger.error("doWaitFor();: unexpected exception - " +e.getMessage());

}finally{try{if (in != null) {

in.close();

}

}catch(IOException e) {

logger.info(e.getMessage());

}if (err != null) {try{

err.close();

}catch(IOException e) {

logger.info(e.getMessage());

}

}returnexitValue;

}/*** 删除文件方法

*@paramfilepath*/

public voiddeleteFile(String filepath) {

File file= newFile(filepath);if(file.delete()) {

logger.info("文件" + filepath + "已删除");

}

}/*** 计算转码时间

*@paramms

*@return

public String sumTime(longms) {int ss = 1000;long mi = ss * 60;long hh = mi * 60;long dd = hh * 24;long day = ms /dd;long hour = (ms - day * dd) /hh;long minute = (ms - day * dd - hour * hh) /mi;long second = (ms - day * dd - hour * hh - minute * mi) /ss;long milliSecond = ms - day * dd - hour * hh - minute * mi -second*ss;

String strDay= day < 10 ? "0" + day + "天" : "" + day + "天";

String strHour= hour < 10 ? "0" + hour + "小时" : "" + hour + "小时";

String strMinute= minute < 10 ? "0" + minute + "分" : "" + minute + "分";

String strSecond= second < 10 ? "0" + second + "秒" : "" + second + "秒";

String strMilliSecond= milliSecond < 10 ? "0" + milliSecond : ""

+milliSecond;

strMilliSecond= milliSecond < 100 ? "0" + strMilliSecond + "毫秒" : ""

+ strMilliSecond + " 毫秒";return strDay + " " + strHour + ":" + strMinute + ":" + strSecond + " "

+strMilliSecond;

}