ffmpeg -i chendong.flv -c:v libx264 -crf 19 -strict experimental chendong.mp4 ffmpeg -i /mnt/D/work_documents/工作文档/公司文档/5.技术文档/zhendoc/vdo/2014suzhou/chendong.flv -c:v libx264 -crf 19 -strict experimental /mnt/D/work_documents/工作文档/公司文档/5.技术文档/zhendoc/vdo/2014suzhou/chendong.mp4
直接将文件转为flv文件
http://fanfq.iteye.com/blog/655569
import java.io.File; import java.util.ArrayList; import java.util.Calendar; import java.util.List; public class ConvertVideo { private final static String PATH = "c:\\ffmpeg\\input\\c.mp4"; public static void main(String[] args) { if (!checkfile(PATH)) { System.out.println(PATH + " is not file"); return; } if (process()) { System.out.println("ok"); } } private static boolean process() { int type = checkContentType(); boolean status = false; if (type == 0) { System.out.println("直接将文件转为flv文件"); status = processFLV(PATH);// 直接将文件转为flv文件 } else if (type == 1) { String avifilepath = processAVI(type); if (avifilepath == null) return false;// avi文件没有得到 status = processFLV(avifilepath);// 将avi转为flv } return status; } private static int checkContentType() { String type = PATH.substring(PATH.lastIndexOf(".") + 1, PATH.length()) .toLowerCase(); // ffmpeg能解析的格式:(asx,asf,mpg,wmv,3gp,mp4,mov,avi,flv等) if (type.equals("avi")) { return 0; } else if (type.equals("mpg")) { return 0; } else if (type.equals("wmv")) { return 0; } else if (type.equals("3gp")) { return 0; } else if (type.equals("mov")) { return 0; } else if (type.equals("mp4")) { return 0; } else if (type.equals("asf")) { return 0; } else if (type.equals("asx")) { return 0; } else if (type.equals("flv")) { return 0; } // 对ffmpeg无法解析的文件格式(wmv9,rm,rmvb等), // 可以先用别的工具(mencoder)转换为avi(ffmpeg能解析的)格式. else if (type.equals("wmv9")) { return 1; } else if (type.equals("rm")) { return 1; } else if (type.equals("rmvb")) { return 1; } return 9; } private static boolean checkfile(String path) { File file = new File(path); if (!file.isFile()) { return false; } return true; } // 对ffmpeg无法解析的文件格式(wmv9,rm,rmvb等), 可以先用别的工具(mencoder)转换为avi(ffmpeg能解析的)格式. private static String processAVI(int type) { List<String> commend = new ArrayList<String>(); commend.add("c:\\ffmpeg\\mencoder"); commend.add(PATH); commend.add("-oac"); commend.add("lavc"); commend.add("-lavcopts"); commend.add("acodec=mp3:abitrate=64"); commend.add("-ovc"); commend.add("xvid"); commend.add("-xvidencopts"); commend.add("bitrate=600"); commend.add("-of"); commend.add("avi"); commend.add("-o"); commend.add("c:\\ffmpeg\\output\\a.avi"); try { ProcessBuilder builder = new ProcessBuilder(); builder.command(commend); builder.start(); return "c:\\ffmpeg\\output\\a.avi"; } catch (Exception e) { e.printStackTrace(); return null; } } // ffmpeg能解析的格式:(asx,asf,mpg,wmv,3gp,mp4,mov,avi,flv等) private static boolean processFLV(String oldfilepath) { if (!checkfile(PATH)) { System.out.println(oldfilepath + " is not file"); return false; } // 文件命名 Calendar c = Calendar.getInstance(); String savename = String.valueOf(c.getTimeInMillis())+ Math.round(Math.random() * 100000); List<String> commend = new ArrayList<String>(); commend.add("c:\\ffmpeg\\ffmpeg"); commend.add("-i"); commend.add(oldfilepath); commend.add("-ab"); commend.add("56"); commend.add("-ar"); commend.add("22050"); commend.add("-qscale"); commend.add("8"); commend.add("-r"); commend.add("15"); commend.add("-s"); commend.add("600x500"); commend.add("c:\\ffmpeg\\output\\a.flv"); try { Runtime runtime = Runtime.getRuntime(); Process proce = null; String cmd = ""; String cut = " c:\\ffmpeg\\ffmpeg.exe -i " + oldfilepath + " -y -f image2 -ss 8 -t 0.001 -s 600x500 c:\\ffmpeg\\output\\" + "a.jpg"; String cutCmd = cmd + cut; proce = runtime.exec(cutCmd); ProcessBuilder builder = new ProcessBuilder(commend); builder.command(commend); builder.start(); return true; } catch (Exception e) { e.printStackTrace(); return false; } } }