天行健，君子以自强不息！
发布时间：2013-04-08 11:17:07
有时需要从ffmpeg中提取出YUV数据用作预览，另存什么的。ffmpeg是先解码成YUV, 再以这个YUV作为输入进行编码，所以YUV数据有两种: 解码后的YUV数据, 以及 编码重建的YUV数据。下面分别讲两个YUV数据从哪儿？以及如何取？1. 解码后的YUV数据在ffmpeg/libavcodec/utils_codec.c的avcodec_decode_video2(.........【阅读全文】
发布时间：2013-04-06 18:11:11
Perl正则表达式教程简介This page provides a basic tutorial on understanding, creating and using regular expressionsin Perl. It serves as a complement to the reference page on regular expressions perlre. Regular expressions are an integral part of the m//, s///, qr// and split operators and .........【阅读全文】
发布时间：2013-04-02 12:29:12
Perl Data Structures CookbookPerl数据结构百科一、描述The single feature most sorely lacking in the Perl programming language prior to its 5.0 release was complex data structures. Even without direct language support, some valiant programmers did manage to emulate them, but it was har.........【阅读全文】
发布时间：2013-04-01 18:23:48
本文的参考和借鉴：http://dranger.com/ffmpeg/tutorial01.html(文章在开篇就声明，它有些过时了)。所以本文分析的FFmpeg源码为Version0.8.2我们在网络上看到的“视频”通常都是一种三层数据封装结构： 编码图像和声音形成的裸视频流(如H.264, VP8, 等)和音频流(mp3,.........【阅读全文】
发布时间：2013-03-31 22:57:17
perl调试教程一、DESCRIPTIONA (very) lightweight introduction in the use of the perl debugger, and a pointer to existing, deeper sources of information on the subject of debugging perl programs.There's an extraordinary number of people out there who don't appear to know anything about .........【阅读全文】
