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DVD转换到AVI的源代码 Since I am clumsy at English writing, I put it briefly. - The development of DVD2AVI is based on MSSG MPEG2Decode http://www.mpeg.org/MPEG/MSSG/ and adds features as follows: 1. GUI interface (gui.cpp) 2. VFAPI support (vfapi.c vfapidec.c) 3. AC3/MPA/LPCM demux (getbit.c) 4. Auto-split AVI output through RGB24/YUY2 (store.c) 5. YUY2 DirectDraw Overlay (store.c gui.cpp) 6. revised I/O routine (getbit.c getbic.h) 7. MMX-optimized motion compensation (recon.c getpic.c) 8. MMX-optimized color space conversion (store.c) 9. audio normalization (norm.c) - The author of TMPGEnc, Hiroyuki Hori, defines the spec of VFAPI (Video File API). You can find the Delphi-based VFAPI SDK on his page. http://www.yks.ne.jp/~hori/VFAPI.html - The development of VFAPI Plug-In refers to MPEG-2 VIDEO VFAPI Plug-In developed by Kazuhiro Mogi. It's helpful to C programmers. http://www.isc.meiji.ac.jp/~ee69011/mpeg2/ - MMX 32-bit iDCT is implanted from Royce Liao's MPEG2AVI 0.16B34. http://members.tripod.com/~liaor/ - Floating Point and Reference iDCT are implanted from Miha's hand-tuned iDCT. http://miha.peternel.homepage.com/idct.html - Dolby Digital decoding (AC3Dec) is implanted from LiViD Project developed by Aaron Holtzman. http://linuxvideo.org/ - 48->44.1KHz downsampling (wavefs44.c) is implanted from WAVEFS44 developed by WTC. http://www.asahi-net.or.jp/~mp4m-truc/SOUND/WTC/WAVECONV.HTM * Known Bugs * 1. DVD2AVI only aligns the start point of A/V streams. If the movie is not encoded at once that PTS restarts (such as bonus track or different episodes) It's possible to lose synchronization from the break point. 2. DVD2AVI treats all Linear PCM as 16bit/48KHz/Stereo without header identification.

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设计由来： 这个程序的功能是随机生成密码。 很多人的密码只是数字或字母，这样的密码安全性是很低的，很容易被破解。 也有很多人使用的密码都和身份证号或生日或电话号、手机号有关，这样的密码非常容易失窃。 如果你在为用什么密码而头疼的时候，使用这个小程序是个很好的选择。 你也许会认为我会把你的密码偷偷的记下来。解决的办法是：生成密码后，不要直接用生成好的，你自己改几个。 OK？放心的用吧。

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Structured Query Language (SQL) is the set of statements with which all programs and users access data in an Oracle database. Application programs and Oracle tools often allow users access to the database without using SQL directly, but these applications in turn must use SQL when executing the user's request. This chapter provides background information on SQL as used by most database systems. This chapter contains these topics: History of SQL SQL Standards Embedded SQL Lexical Conventions Tools Support History of SQL Dr. E. F. Codd published the paper, "A Relational Model of Data for Large Shared Data Banks", in June 1970 in the Association of Computer Machinery (ACM) journal, Communications of the ACM. Codd's model is now accepted as the definitive model for relational database management systems (RDBMS). The language, Structured English Query Language ("SEQUEL") was developed by IBM Corporation, Inc., to use Codd's model. SEQUEL later became SQL (still pronounced "sequel"). In 1979, Relational Software, Inc. (now Oracle Corporation) introduced the first commercially available implementation of SQL. Today, SQL is accepted as the standard RDBMS language. SQL Standards Oracle Corporation strives to comply with industry-accepted standards and participates actively in SQL standards committees. Industry-accepted committees are the American National Standards Institute (ANSI) and the International Standards Organization (ISO), which is affiliated with the International Electrotechnical Commission (IEC). Both ANSI and the ISO/IEC have accepted SQL as the standard language for relational databases. When a new SQL standard is simultaneously published by these organizations, the names of the standards conform to conventions used by the organization, but the standards are technically identical. The latest SQL standard was adopted in July 1999 and is often called SQL:99. The formal names of this standard are: ANSI X3.135-1999, "Database Language SQL", Parts 1 ("Framework"), 2 ("Foundation"), and 5 ("Bindings") ISO/IEC 9075:1999, "Database Language SQL", Parts 1 ("Framework"), 2 ("Foundation"), and 5 ("Bindings")

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1．合理使用索引 2．避免或简化排序 3．消除....