最近由于项目需要把不同格式的视频转换为ts流,故研究了一下ffmpeg。在网上找了很多资料,主要参考了java+windows+ffmpeg实现视频转换功能。
期间也加了几个qq群,咨询了各大高手,其中在代码中关于ffmpeg的命令就是来自其中一个qq群里面的大神。
下载相关文件
ffmpeg地址,我下载是windows 64位static版本。
xuggler下载地址
下面的代码我上传到了github,需要的可以下载下来看看。
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。
下面直接上代码:
1.ffmpeg转换实现
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package vedio.ffmpeg;
import java.io.file;
import java.util.arraylist;
import java.util.list;
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(type,ffmpegpath, inputpath, outputpath);
if ( null != command &&command.size() > 0 ) {
return process(command);
}
return false ;
}
private static int checkcontenttype(stringinputpath) {
string type =inputpath.substring(inputpath.lastindexof( "." ) + 1 ,inputpath.length()).tolowercase();
//ffmpeg能解析的格式:(asx,asf,mpg,wmv,3gp,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( "3gp" )){
return 1 ;
} else if (type.equals( "mov" )){
return 1 ;
} else if (type.equals( "mp4" )){
return 1 ;
} else if (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 file(path);
if (!file.isfile()) {
return false ;
}
return true ;
}
private static boolean process(listcommand) throws ffmpegexception{
try {
if ( null == command || command.size() == 0 )
return false ;
process videoprocess = newprocessbuilder(command).redirecterrorstream( true ).start();
newprintstream(videoprocess.geterrorstream()).start();
newprintstream(videoprocess.getinputstream()).start();
int exitcode =videoprocess.waitfor();
if (exitcode == 1 ) {
return false ;
}
return true ;
} 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( "-i" );
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( "256k" );
command.add( "-vsync" );
command.add( "cfr" );
command.add( "-f" );
command.add( "mpegts" );
command.add(outputpath);
} else if (type== 0 ){
command.add(ffmpegpath + "\\ffmpeg" );
command.add( "-i" );
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=async=1000" );
command.add( "-c:a" );
command.add( "libmp3lame" );
command.add( "-b:a" );
command.add( "192k" );
command.add( "-pix_fmt" );
command.add( "yuv420p" );
command.add( "-f" );
command.add( "mpegts" );
command.add(outputpath);
} else {
throw newffmpegexception( "不支持当前上传的文件格式" );
}
return command;
}
}
class printstream extends thread{
java.io.inputstream __is = null ;
public printstream(java.io.inputstream is){
__is = is;
}
public void run() {
try {
while ( this != null ) {
int _ch = __is.read();
if (_ch == - 1 ) {
break ;
} else {
system.out.print(( char ) _ch);
}
}
} catch (exception e) {
e.printstacktrace();
}
}
}
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2.调用测试类
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package vedio.ffmpeg;
public class convertvedio {
public static void convertvedio(stringinputpath){
string ffmpegpath =getffmpegpath();
string outputpath =getoutputpath(inputpath);
try {
ffmpegutil.ffmpeg(ffmpegpath, inputpath,outputpath);
} catch (ffmpegexception e) {
e.printstacktrace();
}
}
private static string getffmpegpath(){
return "ffmpeg" ;
}
private static string getoutputpath(stringinputpath) {
return inputpath.substring( 0 ,inputpath.lastindexof( "." )).tolowercase() + ".ts" ;
}
}
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3.自定义的异常类
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package vedio.ffmpeg;
public class ffmpegexception extendsexception {
private static final long serialversionuid= 1l;
public ffmpegexception() {
super ();
}
public ffmpegexception(string message){
super (message);
}
public ffmpegexception(throwable cause){
super (cause);
}
public ffmpegexception(string message,throwable cause) {
super (message, cause);
}
}
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4.获取ts流的时长、大小以及分辨率(用到了xuggle,需要下载对应jar包)
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importcom.xuggle.xuggler.icodec;
importcom.xuggle.xuggler.icontainer;
importcom.xuggle.xuggler.istream;
importcom.xuggle.xuggler.istreamcoder;
*/
public static void getvedioinfo(string filename){
// first we create a xuggler containerobject
icontainer container =icontainer.make();
// we attempt to open up thecontainer
int result = container.open(filename,icontainer.type.read, null );
// check if the operation wassuccessful
if (result< 0 )
return ;
// query how many streams the call to openfound
int numstreams =container.getnumstreams();
// query for the total duration
long duration =container.getduration();
// query for the file size
long filesize =container.getfilesize();
long secondduration =duration/ 1000000 ;
system.out.println( "时长:" +secondduration+ "秒" );
system.out.println( "文件大小:" +filesize+ "m" );
for ( int i= 0 ; i
istreamstream = container.getstream(i);
istreamcoder coder = stream.getstreamcoder();
if (coder.getcodectype() == icodec.type.codec_type_video){
system.out.println( "视频宽度:" +coder.getwidth());
system.out.println( "视频高度:" +coder.getheight());
}
}
}
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以上就是在开发过程中做的全部,希望大家多多学习,交流!
原文链接:https://blog.csdn.net/zhengdesheng19930211/article/details/64443620