介绍 java可以用来干什么 package vedio.ffmpeg;
import java.io.File;
import java.util.ArrayList;
import 并不知道;
,
public class FfmpegUtil {
,
public static Boolean ffmpeg (StringffmpegPath, String inputPath,, String outputPath), throwsFFmpegException {
,
if (! checkfile (inputPath)), {
throw newFFmpegException(“文件格式不合法“);
}
,
int type =checkContentType (inputPath);
List command =, getFfmpegCommand(类型、ffmpegPath, inputPath,, outputPath);
if (null !=, command ,, command.size(),祝辞,0),{
return 过程(命令);
,
}
return 假;
}
,
private static int checkContentType (StringinputPath), {
String type =inputPath.substring (inputPath.lastIndexOf (“!”), +, - 1, inputPath.length ()) .toLowerCase ();//ffmpeg能解析的格式:(asx asf,英里/加仑,对wmv, 3 gp、mp4、mov, avi, flv等)
if (type.equals (“avi")), {
return 1;
},else if (type.equals (“mpg")) {
return 1;
},else if (type.equals (“wmv")) {
return 1;
},else if (type.equals (“3 gp")) {
return 1;
},else if (type.equals (“mov")) {
return 1;
},else if (type.equals (“mp4")) {
return 1;
},else 如果(type.equals (“mkv")) {
return 1;
}else if (type.equals (“asf")) {
return 0;
},else if (type.equals (“flv")) {
return 0;
}else if (type.equals (“rm")) {
return 0;
},else if (type.equals (“rmvb")) {
return 1;
}
return 9;
}
,
private static boolean checkfile (Stringpath), {
File File =, new 文件(路径);
if (! file.isFile ()), {
return 假;
}
return 真实;
}
,
private static boolean 过程(Listcommand), throws FFmpegException {
,
try {
,
if (null ==, command | |, command.size (),==0)
return 假;
Process videoProcess =, newProcessBuilder(命令).redirectErrorStream(真正的).start ();
,
newPrintStream (videoProcess.getErrorStream ()) .start ();
,
newPrintStream (videoProcess.getInputStream ()) .start ();
,
int exitcode =videoProcess.waitFor ();
,
if (exitcode ==, 1), {
return 假;
}
return 真实;
},catch (Exception e), {
throw new FFmpegException (“file uploadfailed" e);
}
,
}
,
private static List getFfmpegCommand (inttype, String ffmpegPath,, String oldfilepath,, String outputPath) throws FFmpegException {
List command =, newArrayList ();
if (type ==, 1), {
command.add (ffmpegPath +“\ \ ffmpeg");
command.add(“我);
command.add (oldfilepath);
command.add (“c: v");
command.add (“libx264");
command.add (“-x264opts");
command.add (“force-cfr=1“);
command.add (“c: a");
command.add (“mp2");
command.add (“- b: a");
command.add (“256 k");
command.add (“-vsync");
command.add (“cfr");
command.add (“-f");
command.add (“mpegts");
command.add (outputPath);
},else 如果(type==0) {
command.add (ffmpegPath +“\ \ ffmpeg");
command.add(“我);
command.add (oldfilepath);
command.add (“c: v");
command.add (“libx264");
command.add (“-x264opts");
command.add (“force-cfr=1“);
command.add (“-vsync");
command.add (“cfr");
command.add (“-vf");
command.add (“idet yadif=deint=interlaced");
command.add (“-filter_complex");
command.add (“aresample=异步=1000“);
command.add (“c: a");
command.add (“libmp3lame");
command.add (“- b: a");
command.add (“192 k");
command.add (“-pix_fmt");
command.add (“yuv420p");
command.add (“-f");
command.add (“mpegts");
command.add (outputPath);
其他}{
throw newFFmpegException(“不支持当前上传的文件格式“);
}
return 命令;
}
}
,
class PrintStream extends 螺纹{
java.io.InputStream __is =零;
,
public PrintStream (java.io.InputStream ) {
时间=__is ;
}
,
public void run (), {
try {
while (却;能够!=,null), {
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如何在java中使用ffmpeg对视频进行转换?很多新手对此不是很清楚,为了帮助大家解决这个难题,下面小编将为大家详细讲解,有这方面需求的人可以来学习下,希望你能有所收获。
java主要应用于:1。网页开发;2。Android开发;3。客户端开发;4。网页开发;5。企业级应用开发;6。Java大数据开发;7。游戏开发等。
<强>步骤:
1。研究Java如何调用外部程序
2。研究ffmpeg转换视频格式的命令
3。利用xuggle获取ffmpeg解析的ts流的时长,分辨率以及文件大小。
<强>下面直接上代码:
1。ffmpeg转换实现
