手撸Java提取QSV文件视频内容

2023-06-12 21:27| 来源: 网络整理| 查看: 265

手撸Java提取QSV文件视频内容

QSV文件的构成详见上一篇文章，这篇文章带你手把手撸一遍代码。

创建类

第一步新建一个java类QSV，构造函数传入需要解析的文件名称。

public class QSV { private RandomAccessFile randomAccessFile; private String name; public QSV(String name) throws FileNotFoundException { randomAccessFile = new RandomAccessFile(name, "r"); this.name = name; } } 通用方法逐字节读取文件

我们需要逐个字节读取文件，这边就需要jdk自带的类RandomAccessFile，先定义一个通用函数，输出偏移位置和字节大小获取字节数组。

/** * @param offset 偏移未知 * @param size 字节大小 * @return 字节数组 * @throws IOException */ private byte[] getByteFromFile(int offset, int size) throws IOException { //指针移动至偏移位置 randomAccessFile.seek(offset); //需要读取的字节数 byte[] bs = new byte[size]; randomAccessFile.read(bs); return bs; } 字节数组转16进制字符串 private static final char[] HEX_VOCABLE = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'}; /** * 字节数组转16进制字符串 * * @param bs * @return */ public String bytesToHex(byte[] bs) { StringBuilder sb = new StringBuilder(); for (byte b : bs) { int high = (b >> 4) & 0x0f; int low = b & 0x0f; sb.append(HEX_VOCABLE[high]); sb.append(HEX_VOCABLE[low]); } return sb.toString(); } 字节数组转int /** * 字节数组转int * * @param b * @return */ public int toInt(byte[] b) { int res = 0; for (int i = 0; i static BYTE dict[] = {0x62, 0x67, 0x70, 0x79}; for(int i = 0; i byte[] b = new byte[]{0x62, 0x67, 0x70, 0x79}; for (int i = 0; i DWORD x = 0x62677079; for(DWORD i = size - 1; i != 0; --i) { x = (x 31); x ^= buffer[i]; } for(DWORD i = 1; i String binary = format32(value); binary = binary.substring(i) + String.format("%0" + i + "d", 0); return Long.parseLong(binary, 2); } /** * 右移 * * @param value long * @param i 位移量 * @return long */ private long longRightShift(long value, int i) { String binary = format32(value); binary = String.format("%0" + i + "d", 0) + binary.substring(0, binary.length() - i); return Long.parseLong(binary, 2); } private String format32(long value) { String binary = Long.toBinaryString(value); if (binary.length() //多余的截取掉 binary = binary.substring(binary.length() - 32); } return binary; }

有了新定义的位移算法，解密算法就可以修改为：

private void decrypt_2(byte[] buffer, int size) { long x = 0x62677079; for (int i = size - 1; i != 0; --i) { x = longLeftShift(x, 1) | longRightShift(x, 31); x ^= buffer[i] & 0xFF; } for (int i = 1; i QSV qsv = new QSV("D:\\workspace\\c\\风吹半夏第1集-蓝光1080P.qsv"); qsv.readHead(); qsv.close(); } public void readHead() throws IOException { //signature:10byte byte[] signature = getByteFromFile(0x0, 0xA); //version:4byte byte[] version = getByteFromFile(0xA, 0x4); //vid:16byte byte[] vid = getByteFromFile(0xE, 0x10); //_unknown1:4byte byte[] _unknown1 = getByteFromFile(0x1E, 0x4); //_unknown2:32byte byte[] _unknown2 = getByteFromFile(0x22, 0x20); //_unknown3:4byte byte[] _unknown3 = getByteFromFile(0x42, 0x4); //_unknown4:4byte byte[] _unknown4 = getByteFromFile(0x46, 0x4); //json_offset:8byte byte[] json_offset = getByteFromFile(0x4A, 0x8); //json_size:4byte byte[] json_size = getByteFromFile(0x52, 0x4); //nb_indices:4byte byte[] nb_indices = getByteFromFile(0x56, 0x4); System.out.println(String.format("signature:%s\nversion:%s\nvid:%s\n_unknown1:%s\n_unknown2:%s\n_unknown3:%s\n_unknown4:%s\njson_offset:0x%s\njson_size:0x%s\nnb_indices:0x%s", new String(signature), toInt(version), bytesToHex(vid), bytesToHex(_unknown1), bytesToHex(_unknown2), bytesToHex(_unknown3), bytesToHex(_unknown4), Integer.toHexString(toInt(json_offset)), Integer.toHexString(toInt(json_size)), Integer.toHexString(toInt(nb_indices)))); }

运行结果：

signature:QIYI VIDEO version:2 vid:A90EA47D4333331BB85F331C1130504C _unknown1:01000000 _unknown2:0000000000000000000000000000000000000000000000000000000000000000 _unknown3:01000000 _unknown4:01000000 json_offset:0x167 json_size:0x1d81 nb_indices:0x7 获取json数据

获取json数据需要先获取头部信息记录的json的偏移位置和字节大小，获取到的字节数组再通过老版本解密算法解密即可。

public static void main(String[] args) throws IOException { QSV qsv = new QSV("D:\\workspace\\c\\风吹半夏第1集-蓝光1080P.qsv"); qsv.readJson(); qsv.close(); } public void readJson() throws IOException { //json_offset:8byte byte[] json_offset = getByteFromFile(0x4A, 0x8); //json_size:4byte byte[] json_size = getByteFromFile(0x52, 0x4); //json byte[] bs = getByteFromFile(toInt(json_offset), toInt(json_size)); decrypt_1(bs, bs.length); System.out.println(String.format("json_offset:0x%s\njson_size:0x%s", Integer.toHexString(toInt(json_offset)), Integer.toHexString(toInt(json_size)))); System.out.println(new String(bs, StandardCharsets.UTF_8)); }

运行结果：

json_offset:0x167 json_size:0x1d81 QYVI {"qsv_info":{"ad":{},"aid":"3644740799867701","bid":600,"dr":-1,"independentaudio":true,"m3u8":"","pano":{"type":1},"qsvinfo_version":2,"sdv":"","st":"","thdt":1,"tht":0,"title":"","title_tail_info":{"bt":99,"bts":-1,"et":2621,"ete":-1,"fe":1,"le":0},"tvid":"3185901936393500","vd":{"seg":{"duration":["376140","365508","370300","371477","368311","368308","554319"],"rid":["a8c47c2906b88ae47e8503c96dae0494","4c8578cecbdfa3137a61b7e2bd1c68dc","4bc76f9b4d4ce995f40b42c467d206f8","8ed13ccd56aa2367f5eaabee12043d89","247b4612415c5b452f5965894a967e19","309400bef063cfd6baf19feb0d4a73a9","9771b1042cabfc9828767a3d0350f655"],"size":["75624801","84329329","90135782","82093900","91974933","75298884","111399115"]},"time":{"et":"2621000","st":"99000"}},"vi":"{\"writer\":\"\",\"authors\":\"\",\"upOrder\":36,\"rewardAllowed\":0,\"fl\":[],\"allowEditVVIqiyi\":0,\"isPopup\":1,\"payMark\":0,\"an\":\"风吹半夏\",\"pvu\":\"\",\"subType\":1,\"rewardMessage\":\"\",\"ipLimit\":1,\"pubTime\":\"1673306651000\",\"mainActorRoles\":[],\"up\":\"2023-01-17 20:20:02\",\"un\":\"\",\"qiyiProduced\":1,\"platforms\":[],\"vn\":\"风吹半夏第1集\",\"plc\":{\"4\":{\"downAld\":1,\"coa\":1},\"40\":{\"downAld\":1,\"coa\":1},\"10\":{\"downAld\":1,\"coa\":1},\"5\":{\"downAld\":1,\"coa\":1},\"41\":{\"downAld\":1,\"coa\":1},\"22\":{\"downAld\":1,\"coa\":1},\"32\":{\"downAld\":1,\"coa\":1},\"11\":{\"downAld\":1,\"coa\":1},\"12\":{\"downAld\":1,\"coa\":1},\"7\":{\"downAld\":1,\"coa\":1},\"13\":{\"downAld\":1,\"coa\":1},\"14\":{\"downAld\":1,\"coa\":1},\"91\":{\"downAld\":1,\"coa\":1},\"34\":{\"downAld\":1,\"coa\":1},\"9\":{\"downAld\":1,\"coa\":1},\"6\":{\"downAld\":1,\"coa\":1},\"16\":{\"downAld\":1,\"coa\":1},\"17\":{\"downAld\":1,\"coa\":1},\"27\":{\"downAld\":1,\"coa\":1},\"28\":{\"downAld\":1,\"coa\":1},\"18\":{\"downAld\":1,\"coa\":1},\"29\":{\"downAld\":1,\"coa\":1},\"1\":{\"downAld\":1,\"coa\":1},\"50\":{\"downAld\":1,\"coa\":1},\"31\":{\"downAld\":1,\"coa\":1},\"15\":{\"downAld\":1,\"coa\":1},\"2\":{\"downAld\":1,\"coa\":1},\"3\":{\"downAld\":1,\"coa\":1},\"21\":{\"downAld\":1,\"coa\":1},\"30\":{\"downAld\":1,\"coa\":1},\"19\":{\"downAld\":1,\"coa\":1},\"8\":{\"downAld\":1,\"coa\":1},\"20\":{\"downAld\":1,\"coa\":1}},\"sm\":0,\"st\":200,\"startTime\":99,\"showChannelId\":2,\"vu\":\"http:\\/\\/www.iqiyi.com\\/v_uvxuws1kkw.html\",\"povu\":\"\",\"ppsuploadid\":0,\"qiyiPlayStrategy\":\"非会员每日20:00转免1集\",\"ar\":\"内地\",\"cc\":0,\"videoQipuId\":3185901936393500,\"albumQipuId\":3644740799867701,\"pano\":{\"type\":1},\"subt\":\"许半夏帮童骁骑驱霉运\",\"endTime\":2621,\"cpa\":1,\"userVideocount\":0,\"es\":36,\"plg\":2774,\"stl\":{\"d\":\"http:\\/\\/meta.video.iqiyi.com\",\"stl\":[]},\"subKey\":\"3644740799867701\",\"tvFocuse\":\"赵丽颖欧豪携手创业\",\"qtId\":0,\"ty\":0,\"ppsInfo\":{\"shortTitle\":\"风吹半夏第1集\",\"name\":\"风吹半夏第1集\"},\"sid\":0,\"etm\":\"\",\"keyword\":\"风吹半夏\",\"pturl\":\"\",\"a\":\"\",\"isTopChart\":0,\"idl\":0,\"albumAlias\":\"许半夏帮童骁骑驱霉运\",\"stm\":\"\",\"pd\":1,\"tags\":[],\"coa\":0,\"c\":2,\"producers\":\"\",\"nurl\":\"\",\"tvEname\":\"wild bloom\",\"uid\":\"0\",\"asubt\":\"\",\"d\":\"傅东育|毛溦\",\"vid\":\"a90ea47d4333331bb85f331c1130504c\",\"dts\":\"20230117202002\",\"editorInfo\":\"\",\"tvSeason\":0,\"ntvd\":3185901936393500,\"vpic\":\"http:\\/\\/pic6.iqiyipic.com\\/image\\/20221127\\/e2\\/52\\/v_170312139_m_601_m1.jpg\",\"vType\":0,\"cType\":1,\"payMarkUrl\":\"\",\"apic\":\"http:\\/\\/pic8.iqiyipic.com\\/image\\/20230104\\/6c\\/00\\/a_100498846_m_601_m26.jpg\",\"shortTitle\":\"风吹半夏第1集\",\"tvid\":3185901936393500,\"aid\":3644740799867701,\"au\":\"http:\\/\\/www.iqiyi.com\\/a_yq6d69gtw9.html\",\"tvPhase\":0,\"ifs\":0,\"is\":0,\"tpl\":[],\"actors\":[],\"isVip\":\"\",\"votes\":[],\"previewImageUrl\":\"http:\\/\\/preimage3.iqiyipic.com\\/preimage\\/20230110\\/6a\\/a6\\/v_170312139_m_611_m6.jpg\",\"e\":\"\",\"cnPremTime\":0,\"s\":\"\",\"ma\":\"赵丽颖|欧豪|李光洁|刘威|柯蓝|任重|冯嘉怡|孙千|黄澄澄|是安|宋熹|王西|黄义威|王劲松|刘威葳|尤靖茹|林鹏（大陆男演员）|郝平|淮文|颜世魁|薛淑杰|刘硕|丁冠中|豆艺坤|寇钟吁|杨德民|傅宜箴|朱超艺|黄子琪|荣飞|田玲|周小镔|孔琳|方晓莉|陈创|韩朔|高远\",\"supName\":\"\",\"sc\":0,\"categoryKeywords\":\"电视剧,3644740799867701,0,http:\\/\\/list.iqiyi.com\\/www\\/2\\/------------------.html 自制,12791537149997,2,http:\\/\\/list.iqiyi.com\\/www\\/2\\/-12791537149997-----------------.html 浙江卫视,20291787825994,0,http:\\/\\/list.iqiyi.com\\/www\\/2\\/------------------.html 家庭,23757144288056,2,http:\\/\\/list.iqiyi.com\\/www\\/2\\/-23757144288056-----------------.html 言情,23789230921965,2,http:\\/\\/list.iqiyi.com\\/www\\/2\\/-23789230921965-----------------.html 励志,29717236536467,2,http:\\/\\/list.iqiyi.com\\/www\\/2\\/-29717236536467-----------------.html 商战,32284167249109,2,http:\\/\\/list.iqiyi.com\\/www\\/2\\/-32284167249109-----------------.html 剧情,37979544767779,2,http:\\/\\/list.iqiyi.com\\/www\\/2\\/-37979544767779-----------------.html 都市,80141381722890,2,http:\\/\\/list.iqiyi.com\\/www\\/2\\/-80141381722890-----------------.html 内地,80526421329786,0,http:\\/\\/list.iqiyi.com\\/www\\/2\\/------------------.html 爱情,87328787718281,2,http:\\/\\/list.iqiyi.com\\/www\\/2\\/-87328787718281-----------------.html\",\"onlineStatus\":1,\"mdown\":0,\"bmsg\":{\"t\":\"20230117202002\",\"f\":\"web\",\"mid\":\"\",\"sp\":\"26173601,\"},\"nvid\":\"8ec7f862076f40ee17c908e2bbc3fae2\",\"flpps\":[],\"supType\":\"\",\"lg\":2,\"is3D\":0,\"bossStatus\":0,\"isDisplayCircle\":0,\"actorRoles\":[],\"exclusive\":1,\"circle\":{\"type\":0,\"id\":0},\"commentAllowed\":1,\"tg\":\"忠犬大女主自制工业强国毒舌重组家庭渣男浙江卫视家庭言情霸道总裁御姐励志个人成长虐恋双强普通话商战硬汉剧情出轨兄弟反目女强人爽剧初恋青年奋斗热血女性励志群像个人奋斗接地气女青年大佬原生家庭猪队友都市内地组团爱情\",\"info\":\"1996年的秋天，阳光炫目。许半夏开着一辆桑塔纳，接着刚出狱的童骁骑驶往鹭州出差。一路上童骁骑默默无言，二人之间气氛尴尬。到了酒店后，许半夏的指示很清楚：洗澡，看电视，睡觉，第二天一早，她来接童骁骑一起出差。童骁骑点点头，在许半夏离开后，他开始洗澡，记忆也回到了五年前……\\n1991年的一个雨夜，童骁骑因为急着给妈妈筹医药费，撬了一堆下水井盖，蹬着三轮车拉到了许半夏和小陈的废品站。小陈认定童骁骑就是个骗子，不愿帮忙，但善良的半夏相信童骁骑，给了他钱，并且三个人一大早一起把井盖都送了回去。童骁骑为表感激，愿意替二人做事。许半夏提到当地钢厂有很多废了的下脚料，他们可以去收，但缺一辆大车。于是司机班出身的童骁骑真的把厂里的东风偷偷开了出来，三人摇摇晃晃进了钢厂，挣到了人生的第一桶金，但童骁骑也因为私自用车被厂里开除了。回到废品站的童骁骑心灰意冷，许半夏却安慰道正好，今后他们三个人就一块儿干，而这些钱就是他们的第一笔合伙资金。\",\"supId\":0,\"issueTime\":0,\"dtype\":3,\"producer\":\"\",\"presentor\":[],\"followerCount\":0}","vid":"a90ea47d4333331bb85f331c1130504c","videotype":0}}s 提取视频信息

获取视频信息，首先要先提取索引信息，根据索引信息中的偏移位置和字节大小获取，获取到的字节数组前1024个字节需要解密，根据头部信息中的version判断，如果是1则用老版本算法解密，如果是2则用新版本算法解密。

一个QSV文件包含多段视频数据，已发现的视频格式有flv（旧版客户端）、mpeg-ts（新版客户端）。可以通过前三个字节判断，如果前三个字节转字符串为FLV则为FLV格式。

public static void main(String[] args) throws IOException { QSV qsv = new QSV("D:\\workspace\\c\\风吹半夏第1集-蓝光1080P.qsv"); qsv.readIndex("D:\\workspace\\c"); qsv.close(); } public void readIndex(String outPath) throws IOException { //nb_indices byte[] nb_indices = getByteFromFile(0x56, 0x4); //索引 //_unknown_flag byte[] _unknown_flag = getByteFromFile(0x5A, toInt(nb_indices) + 7 >> 3); System.out.println(String.format("nb_indices:0x%s\n_unknown_flag:%s", Integer.toHexString(toInt(nb_indices)), bytesToHex(_unknown_flag))); //version:4byte byte[] version = getByteFromFile(0xA, 0x4); //索引体 byte[] indices = getByteFromFile(0x5A + (toInt(nb_indices) + 7 >> 3), toInt(nb_indices) * 0x1C); for (int i = 0; i decrypt_1(indice, indice.length); } else if (toInt(version) == 2) { decrypt_2(indice, indice.length); } //索引体 //_codetable byte[] _codetable = new byte[0x10]; System.arraycopy(indice, 0, _codetable, 0, 0x10); //segment_offset byte[] segment_offset = new byte[0x8]; System.arraycopy(indice, 0x10, segment_offset, 0, 0x8); //segment_size byte[] segment_size = new byte[0x4]; System.arraycopy(indice, 0x18, segment_size, 0, 0x4); System.out.println(String.format("_codetable:%s,segment_offset:0x%s,segment_size:0x%s", bytesToHex(_codetable), Integer.toHexString(toInt(segment_offset)), Integer.toHexString(toInt(segment_size)))); exportVideo(i + 1, segment_offset, segment_size, outPath); } } private void exportVideo(int fileindex, byte[] segment_offset, byte[] segment_size, String outPath) throws IOException { byte[] file = getByteFromFile(toInt(segment_offset), toInt(segment_size)); //前1024字节加密 decrypt_2(file, 1024); byte[] head = new byte[0x3]; System.arraycopy(file, 0, head, 0, 0x3); //System.out.println(new String(head)); String outname = name.substring(name.lastIndexOf(File.separator) + 1); String outFile = outPath + File.separator + outname.substring(0, outname.lastIndexOf(".")) + "-第" + fileindex + "段." + new String(head).toLowerCase(); RandomAccessFile write = new RandomAccessFile(outFile, "rw"); System.out.println("export:" + outFile); write.write(file); write.close(); }

运行结果：

nb_indices:0x7 _unknown_flag:7F _codetable:A8C47C2906B88AE47E8503C96DAE0494,segment_offset:0x1ee8,segment_size:0x481f161 export:D:\workspace\c\风吹半夏第1集-蓝光1080P-第1段.flv _codetable:4C8578CECBDFA3137A61B7E2BD1C68DC,segment_offset:0x4821049,segment_size:0x506c371 export:D:\workspace\c\风吹半夏第1集-蓝光1080P-第2段.flv _codetable:4BC76F9B4D4CE995F40B42C467D206F8,segment_offset:0x988d3ba,segment_size:0x55f5ce6 export:D:\workspace\c\风吹半夏第1集-蓝光1080P-第3段.flv _codetable:8ED13CCD56AA2367F5EAABEE12043D89,segment_offset:0xee830a0,segment_size:0x4e4a74c export:D:\workspace\c\风吹半夏第1集-蓝光1080P-第4段.flv _codetable:247B4612415C5B452F5965894A967E19,segment_offset:0x13ccd7ec,segment_size:0x57b6d15 export:D:\workspace\c\风吹半夏第1集-蓝光1080P-第5段.flv _codetable:309400BEF063CFD6BAF19FEB0D4A73A9,segment_offset:0x19484501,segment_size:0x47cf844 export:D:\workspace\c\风吹半夏第1集-蓝光1080P-第6段.flv _codetable:9771B1042CABFC9828767A3D0350F655,segment_offset:0x1dc53d45,segment_size:0x6a3d0cb export:D:\workspace\c\风吹半夏第1集-蓝光1080P-第7段.flv 参考资料

本文参考开源项目qsv2flv，项目地址：github.com/btnkij/qsv2…

该项目采用c语言和Qt开发，本文作者根据原理采用Java进行了翻写，仅供学习和参考。如果要用于实际应用，请使用原项目提供的工具，可以将qsv文件转换为flv或mp4格式。

工具较大且github下载速度较慢，可以关注公众号OriginalTech回复QSV获取。

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