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(); } } } |
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" ; } } |
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); } } |
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()); } } } |
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