本文讲的是其他格式的视频转成MP4。运行环境是windows，需要安装软件ffmpeg。废话不多说直接上代码。
public static void main(String[] args) {
// String sourceVideoPath = "F:/mpg/3.mpg";
// String sourceVideoPath = "F:/MOV/6.mov";
// String sourceVideoPath = "F:/MP4/0724.mp4";
// String sourceVideoPath = "F:/mts/00052.MTS";
String sourceVideoPath = "F:/mxf/972_2432.MXF";
beginConver(sourceVideoPath);
System.out.println("Conver End");
}
/**
* 转换视频格式
*
* @param sourceVideoPath 视频地址
* @return
*/
public static String beginConver(String sourceVideoPath) {
//转码格式
String targetExtension = ".mp4";
//是否删除原文件
Boolean isDeleteResult = false;
File fi = new File(sourceVideoPath);
String fileName = fi.getName();
//文件名不带扩展名
String fileRealName = fileName.substring(0, fileName.lastIndexOf("."));
if (!checkfile(sourceVideoPath)) {
return "";
}
long beginTime = System.currentTimeMillis();
String path = process(fileRealName, sourceVideoPath, targetExtension, isDeleteResult);
if (StringUtils.isNotEmpty(path)) {
long endTime = System.currentTimeMillis();
long timeCha = (endTime - beginTime);
String totalTime = sumTime(timeCha);
if (isDeleteResult) {
deleteFile(sourceVideoPath);
}
return path;
} else {
return "";
}
}
/**
* 实际转换视频格式的方法
*
* @param fileRealName 文件名不带扩展名
* @param sourceVideoPath 原文件地址
* @param targetExtension 目标视频扩展名
* @param isDeleteResult 转换完成后是否删除源文件
* @return
*/
private static String process(String fileRealName, String sourceVideoPath, String targetExtension, boolean isDeleteResult) {
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 {
path = processVideoFormat(aviFilePath, fileRealName, targetExtension, isDeleteResult);
if (isDeleteResult) {
deleteFile(aviFilePath);
}
}
}
return path;
}
/**
* 检查文件类型
*
* @param sourceVideoPath 原文件地址
* @return
*/
private static int checkContentType(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;
} else if (type.equals("mts")) {
return 0;
} else if (type.equals("mxf")) {
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
*
* @param path 文件地址
* @return
*/
private static boolean checkfile(String path) {
File file = new File(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.
*
* @param fileRealName 文件名不带扩展名
* @param sourceVideoPath 原文件地址
* @return
*/
private static String processAVI(String fileRealName, String sourceVideoPath) {
/**
* mencoder.exe的地址
*/
String menCoderPath = "F:/tool/ffmpeg/bin/ffmpeg.exe";
/**
* 转码后的存放视频地址 avi格式
*/
String videoFolder = "F:/tool/videoResult/";
List<String> commend = new java.util.ArrayList<String>();
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 = new ProcessBuilder();
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）
*
* @param oldFilePath 源文件地址
* @param fileRealName 文件名不带扩展名
* @param targetExtension 目标格式扩展名 .xxx
* @return
*/
private static String processVideoFormat(String oldFilePath, String fileRealName, String targetExtension, Boolean isDeleteResult) {
/**
* ffmpeg.exe的地址
*/
String ffmpegPath = "F:/tool/ffmpeg/bin/ffmpeg.exe";
/**
* 转码后的存放视频地址 mp4格式
*/
String targetFolder = "F:/tool/videoResult/";
if (!checkfile(oldFilePath)) {
return "";
}
List<String> commend = new java.util.ArrayList<String>();
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 = new ProcessBuilder();
builder.command(commend);
Process p = builder.start();
doWaitFor(p);
p.destroy();
String videoPath = targetFolder + fileRealName + targetExtension;
String path = processVideoFormatH264(videoPath, ffmpegPath, targetFolder, targetExtension, isDeleteResult);
return path;
} catch (Exception e) {
e.printStackTrace();
return "";
}
}
/**
* 将mpeg4转为h264编码 为了支持播放器
*
* @param path
* @param ffmpegPath
* @return
*/
private static String processVideoFormatH264(String path, String ffmpegPath, String targetFolder, String targetExtension, Boolean isDeleteResult) {
if (!checkfile(path)) {
return "";
}
String newFilePath = targetFolder + UUID.randomUUID().toString() + targetExtension;
List<String> commend = new ArrayList<String>();
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 = new ProcessBuilder();
builder.command(commend);
Process p = builder.start();
doWaitFor(p);
p.destroy();
if (isDeleteResult) {
deleteFile(path);
}
return newFilePath;
} catch (Exception e) {
e.printStackTrace();
return "";
}
}
public static int doWaitFor(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) {
} finally {
try {
if (in != null) {
in.close();
}
} catch (IOException e) {
}
if (err != null) {
try {
err.close();
} catch (IOException e) {
}
}
}
return exitValue;
}
/**
* 删除文件方法
*
* @param filepath
*/
public static void deleteFile(String filepath) {
File file = new File(filepath);
if (file.delete()) {
}
}
/**
* 计算转码时间
*
* @param ms
* @return
*/
public static String sumTime(long ms) {
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;
}