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Apache Commons CODEC and Message digest algorithm (hash algorithm)

First of all we need to understand what CODEC means. It is Coder + Decoder = Codec, which is the encoder decoder. That is, the encoder is also the decoder.Website address: http://commons.apache.org/proper/commons-codec/Apache Commons Codec (TM) software provides implementations of common encoders and decoders such as B

Internet speech Audio Codec (ISAC)

From Wikipedia, the free encyclopedia Internet Speech Audio Codec (iSAC) Internet media type audio/isac[1] Developed Global IP Solutions, nowGoogle Inc Type of format Audio compression format ISAC Codec Developer (s) Global IP Solutions, nowGoogle Inc Written in C Operating system Cross-platform Type Au

FFmpeg Video Audio Codec 0 Basic Learning Method-B

Thank the great God to share, although now still do not understand, keep everyone together to seePS: A lot of people don't know how to read "FFmpeg". It reads "EF EF em Peg"0. Background knowledgeThis chapter focuses on where ffmpeg are used (here are just a few of the many I know, in fact much more than this). To illustrate: FFmpeg is very important.Use FFmpeg as the kernel video player: Mplayer,ffplay, shooter player, Storm av, kmplayer,qq av ... Use FFmpeg as the DirectShow Filt

Summary FFmpeg Video Audio Codec 0 Basic Learning method

2013-11-16 00:04 45621 people read reviews (231) Favorites report FFmpeg Coding and decoding learningDirectory (?) [+]Directory (?) [+]In the CSDN on this period of time, contact with a lot of people in the same industry, especially the use of FFmpeg audio codec, some have many years of experience in the "Great God", some have just started to learn beginners. In the process of discussing with you, I suddenly found a problem: there seems to be an in

"Turn" [summary]ffmpeg Audio codec 0 Basic Learning method

In the CSDN on this period of time, contact with a lot of people in the same industry, especially the use of FFmpeg audio codec, some have many years of experience in the "Great God", some have just started to learn beginners. In the process of discussing with you, I suddenly found a problem: there seems to be an insurmountable gap between the "great God" and the beginner. The "Great God" is highly skilled and explores esoteric issues, while beginners

"H.264/AVC Video Codec technology detailed" 13, Entropy coding Algorithm (4): H. CAVLC parsing the residual data of a macro block

"H.264/AVC Video Codec Technology detailed" video tutorial has been in the "CSDN College" on-line, the video details of the background, standard protocol and implementation, and through a practical project in the form of the standard of the resolution and implementation of H. A, Welcome to watch! "The paper came to the end of shallow, I know this matter to preach", only by themselves in accordance with the standard document in the form of code to oper

"H.264/AVC Video Codec technology detailed" 13, Entropy coding Algorithm (3): CAVLC principle

"H.264/AVC Video Codec Technology detailed" video tutorial has been in the "CSDN College" on-line, the video details of the background, standard protocol and implementation, and through a practical project in the form of the standard of the resolution and implementation of H. A, Welcome to watch! "The paper came to the end of shallow, I know this matter to preach", only by themselves in accordance with the standard document in the form of code to oper

"H.264/AVC Video codec technology specific explanation" 13, Entropy coding Algorithm (3): CAVLC principle

"H.264/AVC Video codec technology specific explanation" video tutorial has been on the "CSDN College" on-line. The video details the background, standard protocol and implementation, and through a real project in the form of the standard of the resolution and implementation, welcome to watch! "The paper came to light, I know this matter to preach." Only have their own in accordance with the standard document in the form of code, the ability of the vid

Python character encoding and decoding--unicode, str, and Chinese: unicodedecodeerror: ' ASCII ' codec can ' t decode__ encoded

-8 to encode Chinese characters. 2.python encoding and decoding of characters Character encoding/decoding function: 1 Unicode: This is Python's built-in function, located in the Unicode class. Unicode (string [, encoding[, Errors]])-> object The purpose of this function is to encode a string as a Unicode object in encoding format. Omitting parameters will be decoded with Python's default ASCII 2) Decode: is located in the Unicode class. Decode (...)| S.decode ([encoding[,errors]])-> string or

Codec --- 1 of stagefright

After multimedia files are parsed, you need to find the appropriate codec according to mime. 2.3 of the system has two methods: SoftwareCodec and omx node codec. The latter can be optimized with special hardware, the former seems to be relatively standard soft decoding.Below is the codeOmxcodec. cppOmxcodec: createVector FindMatchingCodecs (Mime, createEncoder, matchComponentName, flags, matchingCodecs );I

Unicodeencodeerror: ' GBK ' codec can ' t encode character U ' \u200e ' in position 43:illegal multibyte sequence

ProblemA Web page has been obtained in Python:http://blog.csdn.net/hfahe/article/details/5494895The HTML source code, its time UTF-8 encoded.Extract its title section: Title text in: Speech at the Beijing Perl Conference-using Mason to develop high-performance Web sites Then use: Titleuni = Unicode (titlehtml, "Utf-8″"); Or Titleuni = Titlehtml.decode ("Utf-8″"); Decodes it to Unicode, but it makes an error:

Commonly used ITU speech codec Daquan (g.711, g.722.1, g.722.2, g.723.1, g.726, g.728, g.729, g.729.1)

I have summarized the commonly used ITU speech codec for your reference: 1. g.711: pulse code modulation (PCM) of voice Frequencies Encoding type: Expanded PCMEncoding rate: 64 Kbps Theoretical latency: the time for processing a sample (1/8000 seconds = 0.125 milliseconds ); Sound Quality: Long Distance quality;Advantages: Low algorithm complexity, low compression ratio (CD sound quality> 400 Kbps), minimum codec

Jakarta-common-codec usage notes

Commons codec provides base64, Hex, metaphone, soundex, and Other encoding computations. : Http://commons.apache.org/codec/ A. base64 encoding/DecodingPackage demo; Import org. Apache. commons. codec. Binary. base64; Public class base64test ...{ Public static void main (string [] ARGs )...{ Base64 base64 = new base64 (); String STR = "Chinese "; Byte [] enbyt

QT Internationalization related classes (not previously seen codec->tounicode,qtextcodec,qlocale.tostring and Qlocale::setdefault,qinputmethod::locale ())

koi8-r encoded string and wants to convert it to Unicode. The simple approach is to:qbytearray encodedstring = "...";qtextcodec*codec=qtextcodec:: Codecforname ("Koi8-r");QString string = Codec->tounicode (encodedstring);Thereafter, the text string is converted to Unicode. It is also simple to convert a Unicode string into a locally encoded string:QString string = "...";Qtextcodec qtextcodec:: Codecforname

Video codec: The first chapter of the basic coding and decoding

probabilities Visual redundancy: The human visual system is insensitive to certain details Knowledge Redundancy: The structure of regularity can be obtained by a priori knowledge of Beijing knowledge 4. Data compression classificationLossless compression (Lossless) The image is exactly the same after decompression Low compression ratio (2:1~3:1) such as: WINZIP,JPEG-LG lossy compression (Lossy) Image inconsistency after decompression before compressio

S5pv210 multimedia reserved memory space 3-JPEG codec

JPEG codec is used for compresses original raw image and decompresses original JPEG image. This hardware circuit performs all the functions required for compression/Decompression: discrete cosine transformation, quantization, and Hoffmann encoding. Encoding function: Input raw image: Format: ycbcr4: 2: 2, rgb565 Output JPEG file: Baseline JPEG, Color Space: ycbcr4: 2: 2 or ycbcr4: 2: 0 The progressive mode is not supported. Decoding function: Input

Netty series six (codec).

First, the concept The unit of the network transmission is bytes, how to convert the application's data to bytes, and the conversion of bytes to the data of the application, it is necessary to mention the encoder and decoder we introduced in this article. The components that convert the application's data to a network format and the data that transforms the network format into an application are called encoders and decoders, and a single component with both features is called a

Codec learning notes (13): Containers (Part 1)

Video is an important part of Multimedia Systems in computers. To meet the needs of video storage, people have set different video file formats to put the video and audio in one file for simultaneous playback. Video files are actually a container that contains different tracks. The Container formats used are related to the scalability of video files. FourCC is the Four-Character Codes. It consists of 4 characters (4 bytes) and is a Four-byte format that uniquely identifies the video data stream,

Brief introduction of H264 codec frame

After reading the introduction of H264/AVC codec, I just left the following three articles in my mind:1, H264 does not understand how to implement a codec, just a coded video bit stream syntax, and the Bitstream decoding method, this is similar to MPEG.2, H264 and once the standard (such as H261, H263, MPEG-1, MPEG-4) codec implementation process is not much diff

UnicodeDecodeError: & #39; UTF-8 & #39; codec can & #39; t decode byte 0xce in position 52: invalid continuation byte, continuation

UnicodeDecodeError: 'utf-8 'codec can' t decode byte 0xce in position 52: invalid continuation byte, continuation Code: df_w = pd.read_table( r'C:\Users\lab\Desktop\web_list_n.txt', sep=',', header=None) This error occurs when I use the read_table method of pandas to read local files: UnicodeDecodeError: 'utf-8 'codec can' t decode byte 0xce in position 52: invalid continuation byte Query and find the t

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