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# 前言
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FFmpeg是一个跨平台的多媒体库，也是目前音视频领域应用最广泛的库。包括libavcodec、libavformat、libavutil、</br>
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libavdevice、libavfilter、libswscale、libswresample、libpostproc等模块。其中avcodec用于编解码，</br>
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avformat用于解封装，avutil是提供工具类，avdevice用于各平台的设备接入，avfilter提供滤镜操作，</br>
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swscale提供图像缩放与像素格式转换，swresample提供音频重采样，postproc提供高级处理。</br>
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在这里，按照每个模块功能进行分析，如有错漏不当之处，敬请指出。</br>
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### 1：AVIOContext、IO模型与协议
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[AVIOContext结构体](https://blog.csdn.net/u011686167/article/details/121452343)
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### 2：AVFormatContext连接FFmpeg的桥梁
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[AVFormatContext](https://blog.csdn.net/u011686167/article/details/121483584)
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### 3：AVCodecContext编解码器上下文
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[AVCodecContext](https://blog.csdn.net/u011686167/article/details/121506335)
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### 4：AVStream码流
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[码流数组](https://blog.csdn.net/u011686167/article/details/121528354)
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### 5：AVFrame与AVPacket
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[AVFrame与AVPacket](https://blog.csdn.net/u011686167/article/details/121551041)
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### 6：avformat_open_input()打开媒体流
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[打开媒体流](https://blog.csdn.net/u011686167/article/details/121578185)
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### 7：avformat_find_stream_info分析码流信息
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[分析码流信息](https://blog.csdn.net/u011686167/article/details/121630969)
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### 8：av_read_frame()读取音视频帧
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[读取音视频帧](https://blog.csdn.net/u011686167/article/details/121642861)
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### 9：av_parser_parse2()解析数据包
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[解析数据包](https://blog.csdn.net/u011686167/article/details/121667755)
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### 10：av_register_all()注册封装器与解封装器
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[注册封装器与解封装器](https://blog.csdn.net/u011686167/article/details/121691245)
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### 11：avdevice_register_all()注册设备
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[注册设备](https://blog.csdn.net/u011686167/article/details/121716973)
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### 12：avfilter_register_all()注册AVFilter
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[注册AVFilter](https://blog.csdn.net/u011686167/article/details/121721099)
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### 13：avcodec_register_all()注册编解码器
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[注册编解码器](https://blog.csdn.net/u011686167/article/details/121723790)
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### 14：avcodec_find_decoder()查找编解码器
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[查找编解码器](https://blog.csdn.net/u011686167/article/details/121726609)
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### 15：log日志系统分析
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[log日志系统](https://blog.csdn.net/u011686167/article/details/121758769)
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### 16：内存管理系统
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[内存管理系统](https://blog.csdn.net/u011686167/article/details/121781824)
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### 17：图像常用操作
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[图像常用操作](https://blog.csdn.net/u011686167/article/details/121758769)
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### 18：SwsContext图像转换上下文
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[SwsContext](https://blog.csdn.net/u011686167/article/details/121875305)
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### 19：sws_scale图像缩放与图像转换
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[sws_scale](https://blog.csdn.net/u011686167/article/details/121879397)
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### 20：音频采样格式相关API
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[音频采样格式](https://blog.csdn.net/u011686167/article/details/121917453)
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