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FFmpeg decoding 264 file steps

This document uses the h264 video stream as an example to decode the stream data. To highlight this point, this article only focuses on decoding video stream data and does not involve anything else (such as the configuration of the development environment ). If you need this information, please contact me. Prepare Variables Define avcodeccontext. If you use a class, you can define it as a class member. It is defined as a global variable. Static avcodeccontext * g_pcodecctx = NULL; Defines an

VoWLAN: Implement VoIP technology application to import voice to WLAN (1)

between Ethernet and ATM networks. When reliable and adaptive (good enough) channel access is strictly ordered (perfect), satisfactory approaches are generally more popular due to diversity. Another reason to avoid using synchronization when designing VoWLAN systems is that these systems are not operating in a closed environment. The main selling point of using WLAN to transmit voice is to enable dual-mode mobile phones and other voice devices to utilize the existing WLAN infrastructure. Next-g

Explanation of FFMPEG Framework Structure

1. ffmepg Structure Description1.1 IntroductionFFmpeg (Fast Forward Moving Pictures ExpertsGroup) is a complete solution for audio and video separation, conversion, encoding and decoding, and streaming media. The most important solution is the libavcodec library, which is a set of recording, conversion, audio/video encoding and decoding functions.A complete open-source solution. FFmpeg is developed based on Linux, but can be compiled and used in most operating systems. FFmpeg supports MPEG,DivX,

TS Stream parsing Three

passes through the PES packager, it is converted into a PES package . The PES package consists of Baotou and payload , and the specific format is summarized as follows:You can see that Pts/dts is in the PES package , these two parameters is the key to solve the video-audio synchronization display, to prevent the decoder input cache overflow or underflow.PTS indicatesDisplay Unitappear inSystem Target Decoder

Installation of MPlayer under Linux __linux

/lib/codecs--with-win32libdir=/usr/local/lib/codecs-- With-reallibdir=/usr/local/lib/codecs--with-livelibdir=/usr/local/lib/live--with-freetype-config=/usr/bin/ Freetype-configImportant Parameter Description:--prefix= installation path is/usr/local--enable-gui uses the graphical interface, MPlayer has the command line and the graphical interface two kinds of operation Way--enable-live using streaming media support--enable-freetype subtitles fonts can be used TTF fonts--enable-win32 can use a

Implementation of Avi-based network video monitoring and Storage System

various efficient compression and decompression algorithms makes it possible to transmit multimedia information over the network. Network Video Monitoring is widely used in many occasions with Its intuitive, convenient, and rich information. Figure 1 Network Video Monitoring System Structure The network video monitoring system is a system based on the client/server model. It consists of a video server and a client. The Video Server is an embedded system consisting of saa7113, pnx1301, and rtl

[Reprint] ISO 14496-10 (video)-Advanced Video Coding (AVC) (from doom9)

% (especially on high bitrates ). cabac (as cavlc) is a lossless method and therefore will never hurt the quality, but will slow down encoding and decoding. Loop/deblocking filter:In contrary to prefiltering (for example via avisynth, done on the input), or postprocessing/filtering (via the decoder, done on the final output ), loopfiltering is applied during the Encoding Process on every single frame, after it got encoded, but before it gets used as r

Dry Goods | Application of deep learning in machine translation

) In 2013, Nal Kalchbrenner and Phil Blunsom presented a new end-to-end encoder-decoder architecture for machine translation. In 2014, Sutskever developed a method called sequence-to-sequence (seq2seq) learning, and Google used this model to give a concrete implementation method in the tutorial of its deep learning framework tensorflow, and achieved good results (see https:// WWW.TENSORFLOW.ORG/TUTORIALS/SEQ2SEQ). 2.1 (PRE) Fastest speed introduction

FFmpeg source code Simple analysis: Av_find_decoder () and Av_find_encoder ()

This document records the two API functions of FFmpeg: Avcodec_find_encoder () and Avcodec_find_decoder (). Avcodec_find_encoder () is used to find the FFmpeg encoder, Avcodec_find_decoder () is used to find the decoder for ffmpeg.The declaration of Avcodec_find_encoder () is located in Libavcodec\avcodec.h, as shown below./** * Find a registered encoder with a matching codec ID. * * @param ID avcodecid of the requested encoder * @return An encoder If

Gstreamer Study Notes (1)

, * filesrc, * decoder, * audiosink; The pipeline is used to hold and manage components in the gstreamer framework. The following Code creates a new pipeline named pipeline:/* Create a new pipe to hold components */ Pipeline = maid ("Pipeline "); The data source element reads data from a disk file. It has the location attribute to indicate the location of the file on the disk. You can use the standard gobject attribute mechanism to set the correspond

H.264 little video decoding experience (FFMPEG)

Recently, I am doing video file 264 decoding. I feel very difficult because I am not very familiar with this field. However, after unremitting efforts, we have made some progress and feel very lucky. At the beginning, I searched for information on the internet because I was not familiar with it. Although there were a lot of information on the Internet, it was very messy. So I took a lot of detours at the beginning, now I want to write a little bit of my experience. Later, you may be able to take

Attention is all you need and its application in TTS close to Human quality TTS with Transformer and Bert

version of the self attention mentioned in the paper assumes that the current word is only associated with the R words, so attention only occurs between the 2r+1 words. This will also capture the local information of the sequence (which is actually the convolution window in the convolution kernel) TransformerIn this paper, transformer completely abandons the recursive structure, relies on the attention mechanism, and digs the relationship between input and output, which makes the computati

How PCR works

How PCR Works PCR is the abbreviation of program clock reference. Literally, we can understand that this parameter should be related to decoding, because the program concept is involved during decoding. In the previous Transmission Phase of decoding, discrete digital signals occur. Therefore, when analyzing PCR, we can establish a single and ideal environment, this is the issue of clock pairing and timing at the encoding and decoding ends. Here, the PCR jitter is omitted-that is, the extracted

TS Stream decoding process-ES-PES-PTS-DTS

Reprinted from http://blog.chinaunix.net/uid-9688646-id-1998407.html TS Stream decoding process: 1. Get Pat in ts 2. Obtain PMT From ts 3. You can know the video (audio) type (h264), corresponding PID, and pcr pid transmitted in the current network based on PMT. 4. Set the video filter of the Demux module to the PID and stream type of the corresponding video. 5. the payload data in the ts data packet obtained from the video Demux filter is one piece of PES. The ts header contains the number of p

Go Language Practical Notes (iii) | Go DOC Documentation

) ([]byte, error) func unmarshal (data []byte, v interface{}) ErrorType Decoder struct{...} Func newdecoder (R io. Reader) *decodertype Delim runetype Encoder struct{...} Func newencoder (w io. Writer) *encodertype invalidutf8error struct{...} Type Invalidunmarshalerror struct{...} Type Marshaler interface{...} Type Marshalererror struct{...} Type number StringType Rawmessage []Bytetype syntaxerror struct{...} Type Token interface{}type unmarshalfi

vae--is autoencoder encoded output obeys normal distribution.

equivalent to knowing the corresponding noise distribution of each image, and we are able to generate the image we want by selecting specific noise.2nd, this is not only the advantages of generating networks, but also has some limitations, which is to generate the network through the process of confrontation to distinguish between "real" pictures and "fake" pictures, but the resulting picture is just as true as possible, but this does not guarantee that the content of the picture is what we wan

SEQ2SEQ model of deep learning

prediction, but also can be used for video classification, video frame tag. Seq2seq In the two models of many to many, the above figure can see that the fourth and fifth are different, the classical RNN structure of the input and output sequence must be equal length, its application scenario is relatively limited. And the fourth kind of it can be the input and output sequence is not long, this model is the SEQ2SEQ model, namely Sequence to Sequence. It implements the conversion from one sequenc

H.264 the new realm of audiovisual

equipment has led to H.264 in the home appliance market, but PC users have been able to experience its charm in advance. What kind of platform is capable of H.264 decoding H.264 encoded files are usually used in the same way as MPEG-4 files. avi format, some also use the suffix name such as. tp or. ts, and you need to install the correct decoder and playback software to play it properly. For PC users, H.264 encoded video files will undoubtedly mea

Installing MPlayer in the Linux (CentOS 6.4) system

The whole morning finally put MPlayer installed, my system is CentOS 6.4, it is not easy ah!First, the preparatory workRequired installation packages and:1. MPlayer Source code package (mplayer-1.0rc4.tar.bz2) Download: http://www.mplayerhq.hu/MPlayer/releases/2. Decoder installation package (all-20110131.tar.bz2) Download: http://www.mplayerhq.hu/MPlayer/releases/codecs/3. Win32 Decoder installation packag

Kafka ---- kafka API (java version), kafka ---- kafkaapi

, # streams) pair: Key-value pairs of topic and streams * @ Param decoder a decoder that converts from Message to T: decoder for converting Message to T * @ Return a map of (topic, list of KafakStream) pairs.: Key-value pairs of the topic and KafkaStream lists * The number of items in the list is #streams . Each stream supports * An iterator over

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