Normal 0 7.8 磅 0 2
2. Where to download the source code of FFMPEG?
There are three ways to do that,And they will be introduced one by one.
2.1 How to Use SVN to check it out?
Firstly, we must have installedSVN client tool. I suggest to use tortoisesvn which is free and very easy toolTo checkout, update, commit, etc. It can be found in the following list:
Application 32bit
1. Directory of each sub-module in the FFMPEG main directory, omitted.
2. The format, protocol, and CODEC module can be plugin and have their own unified structure types. The open interfaces corresponding to the modules are defined in it. Here, muxer and demuxer have different structures: avoutputformat and avinputformat. encoder and decoder use the avcodec structure and the Protocol is urlprotocol.
3. [Next let's look at
When we use CentOS7 to bring the source, Yum search is not the title of the above two related packages, and OPENCV need to use FFmpeg read video files. This has to be installed.You can refer to the FFmpeg official documentation:Http://rpmfusion.org/FAQInstall the title-said package with a rpmfusion third-party external software repository.First you need to install this source, run the command:Su-c ' Yum loc
Recently, I am working on multimedia development on Android. First, I need to port FFMPEG on Android. As a result, I have been searching for articles on the Internet for a long time, the generated library file is only 1.6kb in size,
This can be an emergency for me.
Finally, in my system Ubuntu 10.04, Android ndk is Android ndk r5b, And the libffmpeg. So file of 1.9m size is successfully compiled. Recently I decided to write down the compilation proces
use other libraries later, you can add them. The above four libraries can complete video encoding and decoding). The structure is shown in:
Step 4: Include the files to be used in the FFMPEG package in the header file of the project, as follows:
#ifndef INT64_C #define INT64_C(c) (c ## LL) #define UINT64_C(c) (c ## ULL) #endif #ifdef __cplusplus extern "C" {#endif /*Include ffmpeg header file*/#include
I am pleased to announce that FFMPEG can now be built unpatchedThe iPhone. The process is still not entirely without pain, however.Here's how it's done:1. download and install the iPhone sdks 3.1.2. Get the latest gas-Preprocessor and install it in/usr/local/binOr some other directory in your $ path.Http://github.com/yuvi/gas-preprocessor/3. Get the latest FFMPEG from SVN (minimum r20151 ).4. Configure
Transferred from: http://www.cnblogs.com/dwdxdy/p/3240167.html 1. Separating the video audio streamFfmpeg-i input_file-vcodec Copy-an output_file_video // split video stream ffmpeg-i input_file-acodec copy-vn ou Tput_file_audio // separate audio streams 2. Video re-useFfmpeg–i test.mp4–vcodec copy–an–f M4V test. the ffmpeg–i test.avi–vcodec copy–an–f m4v test. the 3. Video transcoding352*278 –an–f M4
Http://blog.sina.com.cn/s/blog_8cfe05150100uhm2.html
The interfaces of the FFMPEG library are all C functions, and the header file does not have the extern "C" Declaration. Therefore, you should pay attention to calling the FFMPEG function in the CPP file.Generally, a library written in C can be used by C/C ++ at the same time.# Ifdef _ cplusplusExtern "C "{# Endif
# Ifdef _ cplusplus} // Endof exter
Ninsys74.sys, b674a2d4. EXE, 42ae09e4. dll, msavp. dll, avpdj. dll, avpwl. dll, etc.
EndurerOriginal2007-10-121Version
At noon yesterday, I helped two netizens clean up computer viruses.
Recall one of them first.
The netizen's computer is installed with rising 2007 anti-virus software, but it is an expired download ver
/Download.html under a Windows fit the latest version, change the name to yasm.exe put in c: \ windows \ system32 (mainly to save the need to add environment variables) or put in C: \ mingw \ msys \ 1.0 \ bin folder. It is best to get one for NASM, and some libraries are often compiled and used. It doesn't matter if you don't put it, that is, the generated items do not support assembly, so the speed will be very affected.
Ii. compilation process
1. Edit the c: \ mingw \ msys \ 1.0 \ msys. BAT
1. Download the following three files first to www.3gpp.org:-Http://www.3gpp.org/ftp/Specs/2004-03/Rel-5/26_series/26204-520.zip-Http://www.3gpp.org/ftp/Specs/2004-03/Rel-5/26_series/26073-530.zip-Http://www.3gpp.org/ftp/Specs/2004-03/Rel-5/26_series/26104-540.zipExtract each of the following folders:-26204-520.zip into Libavcodec/amrwb_float-26073-530.zip into Libavcodec/amr-26104-540.zip into Libavcodec/amr_float2. Recompile ffmpeg, remember to add
.
Decode_video (InputStream *ist, Avpacket *pkt, Int*got_output), decoding in InputStream, Single-threaded and multi-threaded chip decoding walk Vctx->codec->decode, multi-threaded frame decoding go ff_thread_decode_frame.
Arrows are pointer reference relationships, and straight lines are parallel relationships. Hehe, we can look at the code, here to draw, that is to show that they have a connection.
In addition, the synchronization problem, we should also pay attention to.
Here's a picture h
Original Address:MinGW QTSun 1 EastProblems and workarounds for compiling QT source code using MinGW without using the QT SDK:Configure-fast-release-no-exceptions-no-rtti-no-stl-no-qt3support-no-opengl-no-multimedia-no-webkit-no-script- No-scripttools-nomake tools-nomake examples-nomake demos-nomake docs-nomake translations-platform win32-g++The TDM version of MinGW GCC is highly recommended, compared to the official MinGW slow and obscure, the TDM installation process is simple, clear, and fast
Recently playing Heroku deployment application, now encountered a problem, my application needs to use the FFmpeg library, how to Heroku Create a PHP application how to install FFmpeg library?
Reply content:
Recently playing Heroku deployment application, now encountered a problem, my application needs to use the FFmpeg library, how to Heroku Create a PHP ap
This article uses a test program to play the local file and RTSP video stream based on the FFMPEG dynamic library.
Reference: http://blog.csdn.net/leixiaohua1020/article/details/8652605,
Http://blog.csdn.net/guanghua2_0beta/article/details/37578299
Create a project, refer to the previous article: Creating.
The Code is as follows. A few changes have been made on the basis of the reference document, mainly to replace some functions of the old
FFmpeg programming study NOTE 2: audio re-sampling, ffmpeg Study Notes
The core function swr_convert of ffmpeg for Implementing Audio re-sampling is very powerful. However, the comment of ffmpeg is too simple and such problems often occur in applications, in fact, swr_convert is also applied after the first execution
[This article is a complex topic of FFMPEG. It will be quite cool to write]
[Different transcoding environments may have different code flows]
First popularized:
Timestamp, DTS (Decoding time stamp), PTS (presention time stamp), CTS (current time stamp ).
The timestamp in ffmepg is in microseconds and is related to the timebase variable. It is used as the time benchmark granularity of DTs and PTS, and the value will be large.
Among them, the av_resc
These days to do project, one of the requirements is that the user uploads the video file to the server, and then the server automatically intercepts the video as the corresponding thumbnail image, the server-side language is written in PHP, find a half-day data, found that ffmpeg-php can meet the demand, So here's a quick introduction to the configuration and usage of the extension library.The test server environment Wampserver Version 2.1,php5.3.5,
Download the new version of FFMPEG 0.6.1: http://www.ffmpeg.org/releases/ffmpeg-0.6.1.tar.bz2 to the official website
When I downloaded mingw, it was completely installed online. msys will be installed in the mingw directory.
I have mingw installed in C:/mingw, and msys is in C:/mingw/msys
Compile FFMPEG also requires SDL address: http://www.libsdl.org/release
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