javaCV+openCV+FFmpeg实现视频帧转为图像并进行人脸识别（一）

package faceRecog.utils; import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.Calendar; import java.util.List; public class VedioConvertUtil { private static String inputPath = ""; private static String outputPath = ""; private static String ffmpegPath = ""; public static void main(String args[]) throws IOException { getPath(); if (!checkfile(inputPath)) { System.out.println(inputPath + " is not file"); return; } if (processToFlv()) { System.out.println("ok"); } } private static void getPath() { // 先获取当前项目路径，在获得源文件、目标文件、转换器的路径 File diretory = new File(""); try { // String currPath = diretory.getAbsolutePath(); String currPath = "D:\\facerecog"; inputPath = currPath + "\\input\\VOLVO_test.mp4"; outputPath = currPath + "\\output\\"; ffmpegPath = "C:\\ffmpeg\\bin\\"; System.out.println(currPath); } catch (Exception e) { System.out.println("getPath出错"); } } private static boolean processToFlv() { int type = checkContentType(); boolean status = false; if (type == 0) { System.out.println("直接转成flv格式"); status = processFLV(inputPath);// 直接转成flv格式 } else if (type == 1) { String avifilepath = processAVI(type); if (avifilepath == null) return false;// 没有得到avi格式 status = processFLV(avifilepath);// 将avi转成flv格式 } return status; } private static int checkContentType() { 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 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(ffmpegPath + "mencoder"); commend.add(inputPath); 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(outputPath + "a.avi"); try { ProcessBuilder builder = new ProcessBuilder(); Process process = builder.command(commend).redirectErrorStream(true).start(); new PrintStream(process.getInputStream()); new PrintStream(process.getErrorStream()); process.waitFor(); return outputPath + "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(inputPath)) { System.out.println(oldfilepath + " is not file"); return false; } List<String> command = new ArrayList<String>(); command.add(ffmpegPath + "ffmpeg"); command.add("-i"); command.add(oldfilepath); command.add("-ab"); command.add("56"); command.add("-ar"); command.add("22050"); command.add("-qscale"); command.add("8"); command.add("-r"); command.add("15"); command.add("-s"); command.add("480x320"); command.add(outputPath + "a.flv"); try { // 方案1 // Process videoProcess = Runtime.getRuntime().exec(ffmpegPath + "ffmpeg -i " + oldfilepath // + " -ab 56 -ar 22050 -qscale 8 -r 15 -s 600x500 " // + outputPath + "a.flv"); // 方案2 Process videoProcess = new ProcessBuilder(command).redirectErrorStream(true).start(); new PrintStream(videoProcess.getErrorStream()).start(); new PrintStream(videoProcess.getInputStream()).start(); videoProcess.waitFor(); return true; } catch (Exception e) { e.printStackTrace(); return false; } } } 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) System.out.print((char)_ch); else break; } } catch (Exception e) { e.printStackTrace(); } } }