java获取视频的信息

/**

* list长度为8

* 序列1: 提取出播放时间

* 序列2: 开始时间

* 序列3: bitrate 码率 单位 kb

* 序列4: 编码格式

* 序列5: 视频格式

* 序列6: 分辨率

* 序列7: 音频编码

* 序列8: 音频采样频率

* @param oldfilePath 原文件

* @return

*/

private static List<String> getVideoInfo(String oldfilePath) {

List<String> list = new ArrayList<String>();

if (!checkfile(oldfilePath)) {

System.out.println(oldfilePath + " is not file");

return null;

}

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

commend.add(ffmpegPath);

commend.add("-i");

commend.add(oldfilePath);

System.out.println(commend.toString());

try {

ProcessBuilder builder = new ProcessBuilder();

builder.command(commend);

builder.redirectErrorStream(true);

Process p= builder.start();

//1. start

BufferedReader buf = null; // 保存ffmpeg的输出结果流

String line = null;

//read the standard output

buf = new BufferedReader(new InputStreamReader(p.getInputStream()));

StringBuffer sb= new StringBuffer();

while ((line = buf.readLine()) != null) {

System.out.println(line);

sb.append(line);

continue;

}

int ret = p.waitFor();//这里线程阻塞，将等待外部转换进程运行成功运行结束后，才往下执行

//1. end

String result = sb.toString();//得到视频流

//通过视频流获取视频信息

PatternCompiler compiler =new Perl5Compiler();

String regexDuration ="Duration: (.*?), start: (.*?), bitrate: (\\d*) kb\\/s";

String regexVideo ="Video: (.*?), (.*?), (.*?)[,\\s]";

String regexAudio ="Audio: (\\w*), (\\d*) Hz";

Pattern patternDuration = compiler.compile(regexDuration,Perl5Compiler.CASE_INSENSITIVE_MASK);

PatternMatcher matcherDuration = new Perl5Matcher();

if(matcherDuration.contains(result, patternDuration)){

MatchResult re = matcherDuration.getMatch();

list.add(re.group(1));//提取出播放时间

list.add(re.group(2));//开始时间

list.add(re.group(3));//bitrate 码率 单位 kb

}

Pattern patternVideo = compiler.compile(regexVideo,Perl5Compiler.CASE_INSENSITIVE_MASK);

PatternMatcher matcherVideo = new Perl5Matcher();

if(matcherVideo.contains(result, patternVideo)){

MatchResult re = matcherVideo.getMatch();

list.add(re.group(1));//编码格式

list.add(re.group(2));//视频格式

list.add(re.group(3));//分辨率

}

Pattern patternAudio = compiler.compile(regexAudio,Perl5Compiler.CASE_INSENSITIVE_MASK);

PatternMatcher matcherAudio = new Perl5Matcher();

if(matcherAudio.contains(result, patternAudio)){

MatchResult re = matcherAudio.getMatch();

list.add(re.group(1));//音频编码

list.add(re.group(2));//音频采样频率

}

} catch (Exception e) {

return null;

}

return list;

}

需要用到的jar包http://download.csdn.net/detail/zhaoxd_1/9347111