java 調用ffmpeg,取時間長度,碼率與截圖.

最近的項目中需要從上傳的音頻檔案中截取一張圖片,於是問了問穀哥,它給出了一大堆答案,整理了一下,發布上來.

package com.jzero.upload;  import java.io.BufferedReader;import java.io.File;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.util.LinkedList;import java.util.List;import java.util.regex.Matcher;import java.util.regex.Pattern;  import com.jzero.util.MPrint;import com.jzero.util.MRecord;  public class MFFmpeg {    private String ffmpegPath;    private static final String FILE_SEPARATOR = File.separator;    public static MFFmpeg self = new MFFmpeg();      private MFFmpeg() {    }      public static MFFmpeg me() {        return self;    }      public MFFmpeg init(String path) {        this.ffmpegPath = path;        return this;    }      private static boolean isSurpportedType(String type) {        Pattern pattern = Pattern.compile(                "(asx|asf|mpg|wmv|3gp|mp4|mov|avi|flv){1}$",                Pattern.CASE_INSENSITIVE);        Matcher matcher = pattern.matcher(type);        return matcher.find();    }      /**     *     * @param sourceFile     *            將要被轉換的目標檔案     * @param desctination     *            轉換之後檔案的存放路徑 ffmpeg commandLine： ffmpeg -y -i     *            /usr/local/bin/lh.mp4 -ab 56 -ar 22050 -b 500 -s 320x240     *            /usr/local/bin/lh.flv     * @throws IOException     */    public MRecord converToFlv(File sourceFile, String destination) {          String fileName = sourceFile.getName();        String surffix = fileName.substring(fileName.lastIndexOf(".") + 1);        if (!isSurpportedType(surffix))            throw new RuntimeException("unsurpported file type " + surffix);          List<String> cmdParam = new LinkedList<String>();        cmdParam.add(ffmpegPath);        cmdParam.add("-y");        cmdParam.add("-i");        cmdParam.add(sourceFile.getAbsolutePath());        cmdParam.add("-ab");        cmdParam.add("56");        cmdParam.add("-ar");        cmdParam.add("22050");        cmdParam.add("-b");        cmdParam.add("500");        cmdParam.add("-s");        cmdParam.add("320*240");        cmdParam.add(destination + FILE_SEPARATOR                + fileName.substring(0, fileName.lastIndexOf(".")) + ".flv");          return execCmd(cmdParam);    }      /**     *     * 擷取圖片的第一幀 ffmpeg commandLine： ffmpeg -y -i /usr/local/bin/lh.3gp -vframes     * 1 -r 1 -ac 1 -ab 2 -s 320x240 -f image2 /usr/local/bin/lh.jpg     *     * @param sourceFile     *            源檔案     * @param destination     *            目標檔案     * @param surfix     *            要儲存的圖片格式：jpg,jpeg,gif     * @throws IOException     * @throws IOException     */    public MRecord captureFirstFrame(File sourceFile, String destination) {        return captureFirstFrame(sourceFile, destination, "jpg");    }      public MRecord captureFirstFrame(File sourceFile, String destination,            String surfix) {        String fileName = sourceFile.getName();        String surffix = fileName.substring(fileName.lastIndexOf(".") + 1);        if (!isSurpportedType(surffix))            throw new RuntimeException("unsurpported file type " + surffix);          List<String> cmd = new LinkedList<String>();        cmd.add(ffmpegPath);        cmd.add("-y");        cmd.add("-i");        cmd.add(sourceFile.getAbsolutePath());        cmd.add("-vframes");        cmd.add("1");        cmd.add("-r");        cmd.add("1");        cmd.add("-ac");        cmd.add("1");        cmd.add("-ab");        cmd.add("2");        cmd.add("-s");        cmd.add("56*56");        cmd.add("-f");        cmd.add("image2");        cmd.add(destination + FILE_SEPARATOR                + fileName.substring(0, fileName.lastIndexOf(".")) + "."                + surfix);          return execCmd(cmd);    }      private MRecord execCmd(List<String> cmd) {        MRecord out = null;        final ProcessBuilder pb = new ProcessBuilder();        pb.redirectErrorStream(true);        pb.command(cmd);        try {            final Process p = pb.start();            InputStream in = p.getInputStream();            out = pattInfo(in);            // 開啟單獨的線程來處理輸入和輸出資料流，避免緩衝區滿導致線程阻塞.            try {                p.waitFor();            } catch (InterruptedException e) {                e.printStackTrace();                Thread.currentThread().interrupt();            }            p.getErrorStream().close();        } catch (IOException e) {            e.printStackTrace();        }        return out;    }      // 負責從返回資訊中讀取內容    private String read(InputStream is) {        BufferedReader br = null;        StringBuffer sb = new StringBuffer();        try {            br = new BufferedReader(new InputStreamReader(is), 500);              String line = "";            while ((line = br.readLine()) != null) {                // System.out.println(line);                sb.append(line);            }            br.close();        } catch (Exception e) {        } finally {            try {                if (br != null)                    br.close();            } catch (Exception e) {            }        }        return sb.toString();    }      // 負責從返回的內容中解析    /**     * Input #0, avi, from 'c:\join.avi': Duration: 00:00:10.68(時間長度), start:     * 0.000000(開始時間), bitrate: 166 kb/s(碼率) Stream #0:0: Video: msrle     * ([1][0][0][0] / 0x0001)(編碼格式), pal8(視頻格式), 165x97(解析度), 33.33 tbr, 33.33     * tbn, 33.33 tbc Metadata: title : AVI6700.tmp.avi Video #1     */    public MRecord pattInfo(InputStream is) {        String info = read(is);        MRecord out = new MRecord();        String regexDuration = "Duration: (.*?), start: (.*?), bitrate: (\\d*) kb\\/s";        Pattern pattern = Pattern.compile(regexDuration);        Matcher m = pattern.matcher(info);        if (m.find()) {            out.set("timelen", getTimelen(m.group(1))).set("begintime", m.group(2)).set(                    "kb", m.group(3) + "kb/s");        }        return out;    }    //格式:"00:00:10.68"    private int getTimelen(String timelen){        int min=0;        String strs[] = timelen.split(":");        if (strs[0].compareTo("0") > 0) {            min+=Integer.valueOf(strs[0])*60*60;//秒        }        if(strs[1].compareTo("0")>0){            min+=Integer.valueOf(strs[1])*60;        }        if(strs[2].compareTo("0")>0){            min+=Math.round(Float.valueOf(strs[2]));        }        return min;    }    public static void main(String[] args) {        // String ffmpegPath = "c:/ffmpeg.exe";        // File file = new File("c:/join.avi");        // MFFmpeg.me().init(ffmpegPath).captureFirstFrame(file, "c:/", "jpg");        String t = "00:00:10.68";        String strs[] = t.split(":");        int min=0;        if (strs[0].compareTo("0") > 0) {            min+=Integer.valueOf(strs[0])*60*60;//秒        }        if(strs[1].compareTo("0")>0){            min+=Integer.valueOf(strs[1])*60;        }        if(strs[2].compareTo("0")>0){            min+=Math.round(Float.valueOf(strs[2]));        }        MPrint.print(min);    }  }
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