Bit rate control is actually a coding optimization algorithm, which is used to control the video stream size.
So what is the purpose of its control? We can imagine that the same video encoding format, the code flow is large, it co
recorded as N, that is, how many frames appear once I-frames, the latter describes how many frames appear once P-frames, recorded as M. The GOP shown is n=12,m=3.We usually think that the longer the GOP length of MPEG-2, the higher the image compression efficiency is, the higher the image quality is in the same code s
What is the difference between \ R and \ n, how should I use it when coding?Difference:
Full Name: Carriage return (carriage is "word car" meaning, a part of the printer)
ASCII code: 13
Action: Moves the cursor to the far le
entering the next line. These two actions together are called "carriage returns", which is equivalent to the "enter" key in the keyboard now.Telex Typewriter:(the TTY concept under Teletype Model 33,linux/unix also comes from this) can be played 10 characters per second. But it has a problem, that is, when the line is finished, it will take 0.2 seconds to hit tw
the contents of the Unicode extended character Vocabulary "Unified Chinese character extension a". and is compatible with the previous national character encoding standard (gb2312,gb13000.1).
3. Coding method
The GB 18030 standard uses single-byte, Double-byte, and four-byte three ways to encode characters. The single-byte portion uses 0x00 to 0x7f code (corresponding to the ASCII code). The double-byte
I haven't talked to my new blog for a long time. I have been charging urgently in the last month and busy with some private affairs. However, my blog garden is still my favorite ~
I want to make statistics this time,Class Design, coding, and performance. What should your team do first?
1. First, design the architecture and consider changes, reuse and reuse as m
and unified coding format in East Asia, such as mainland China, Hong Kong, Taiwan, Japan and Korea. and compatible with the Unicode 3.0 version to fill the contents of the Unicode extended character Vocabulary "Unified Chinese character extension a". and is compatible with the previous national character encoding standard (gb2312,gb13000.1).
3. Coding method
I have read a lot of articles over the past few days. I feel deeply touched by the article "Why does Google execute strict coding specifications.
I have to admit that I used to think that coding standards are useless, and sometimes I think it is a waste of time for developers.
In the process of cooperating with another company to develop a project, I accidentally
php files are UTF-8 encoded, then you must use iconv for encoding conversion during INSERT, convert str into GB2312 library, read the same, use iconv to convert UTF-8 display.
What encoding is used on your front-end page, so your strings have already been encoded in this way. So, even if they are stored in the database, their machine code must be like that, no matter where they are stored, no matter
PHP System 100 people at the same time to handle the MySQL insert operation, what good code to optimize the coding
The type of table is MyISAM, concurrent operation,
Do you need to lock the table as follows?
Or is MySQL automatically queued to process 100 requests in turn
mysql_query ("Lock TABLES ' user ' WRITE");
UTF-8 to GBK coding problem, what is the good solution?
Iconv need to add IGNORE parameter, in order to complete the conversion, or the error will terminate, and Mb_convert_encoding, is able to complete the conversion, but the converted files, sometimes appear in Chinese comments replaced with???。
I developed a UTF-8 v
requires determining that as many containers as possible are loaded into the ship without the loading volume being limited.Solution: Each time the weight of the lightest person.Huffman Code:For shorter characters with high frequency, the characters with lower frequency appear with longer encoding. A 0,1 string is specified for each character as its code, and the code that requires either character is not p
that compatible with all nations I can use utf-8 ah, can, completely normal work, the reason is not sure that Unicode is more efficient than utf-8 AH (uicode fixed with 2 byte encoding, utf-8 need to calculate), but Unicode is more wasted space, yes, This is a way to use space for time, and storage to the hard disk, o
It is important for developers to maintain good coding practices in development. The vb.net coding specification is a coding specification that proves to be able to significantly improve code readability and help with code management and classification. By using this
Unicode symbol to a file or transfer it to the network and it needs to be encoded to be converted to the STR type, so Python provides the Encode method, which translates from Unicode to Str. The relationship between the two transitions is as follows:The problem of attentionFile reads and writes:Write: Determine what type will be written, if it is a byte, write d
(groups) with this feature can be called integrated in-environment. such as Microsoft's Visual Studio series, Borland C + + Builder, Delphi series and so on. The program can be run independently or in combination with other programs. For example, the basic language is available in Microsoft Office software, and you can write WordBasic programs in Microsoft Word documents. The IDE provides users with the convenience of using modern programming languag
to learn FFMPEG, so that you can learn FFMPEG step by step.
0. Background Knowledge
This chapter mainly introduces where FFmpeg is used (only a few of what I know here is actually far more than this ). To put it bluntly, FFmpeg is very important.
Use FFMPEG as the kernel Video Player:
Mplayer, ffplay, shooter playe
coder, I really dislike to waste time in maintain codebase when it's bad for maintenance, it's like someone is push ing you into a puzzle map, you just see a bit clue around you, but never get to know the whole picture of it, the long Tim E Lonely walk certainly would kill us patience, especially when someone was there call us out, and whipping we into a stres Sful State for reporting progress. Unfortunately, that's usually happened as
It is important to get used to improving Code coding efficiency. Experience:1. Clarify the requirements before writing code (this is critical): How many functions can be used to successfully convert the business?2. DesignClarify the Business Objects, from large to fine-grained design, and see what design patterns are u
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