A codec is a device or software that is used to compress or decompress a digital media file, such as a video or song.encoder performs the compression (encoding) functiondecoder performs the decompression (decoding) function A file format is like a ty…

We spend a full five hours and 16 minutes a day in front of a screen, and that's without even turning on a television. So says a statistic from eMarketer, a research firm that focuses on digital media and marketing. It says that for the first time we…

Network Working Group J. RosenbergRequest for Comments: 3264 dynamicsoftObsoletes: 2543 H. SchulzrinneCategory: Standards Track Columbia U. June 2002 An Offer/Answer Model with the Session Description Protocol (SDP) Status of this Memo This document…

Network Working Group H. Schulzrinne Request for Comments: 2326 Columbia U. Category: Standards Track A. Rao Netscape R. Lanphier RealNetworks April 1998 Real Time Streaming Protocol (RTSP) Status of this Memo This document specifies an Internet stan…

from: tuxradar.com/content/how-it-works-linux-audio-explained How it works: Linux audio explained Posted at 11:30am on Thursday April 8th 2010 There's a problem with the state of Linux audio, and it's not that it doesn't always work. The issue is tha…

Refer: https://www.ietf.org/rfc/rfc2326.txt Network Working Group H. SchulzrinneRequest for Comments: 2326 Columbia U.Category: Standards Track A. Rao Netscape R. Lanphier RealNetworks April 1998 Real Time Streaming Protocol (RTSP) Status of this Mem…

Return value/code Description 0x00030200 STG_S_CONVERTED The underlying file was converted to compound file format. 0x00030201 STG_S_BLOCK The storage operation should block until more data is available. 0x00030202 STG_S_RETRYNOW The storage operatio…

Refer to http://portableapps.com/apps for detail. Below is just a list at Jan-01-2017 for quick shower. Portable App Directory Over 300 Real Portable AppsOver 500 Million DownloadsFree, Legal, Safe, and Fully PortableNo Shovelware. No Bundleware.The …

分类: C/C++ 使用ffmpeg实现转码样例(代码实现) 使用ffmpeg转码主要工作如下: Demux -> Decoding -> Encoding -> Muxing 其中接口调用如下: 点击(此处)折叠或打开 av_register_all(); avformat_open_input avformat_find_stream_info open_codec_context av_image_alloc avcodec_alloc_frame avformat_alloc_o…

http://www.cnblogs.com/tanlon/p/3879081.html 在正式开始解码练习前先了解下关于FFmpeg中比较重要的函数以及数据结构. 1. 数据结构:  (1) AVFormatContext  AVFormatContext是一个贯穿始终的数据结构,很多函数都要用到它作为参数.FFmpeg代码中对这个数据结构的注释是:format I/O context 此结构包含了一个视频流的格式内容.其中存有了AVInputFormat(or AVOutputFormat同…