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                [TOC] ### 函數列表 ***** 簡單分析一下上述幾個結構體的初始化和銷毀函數。這些函數列表如下。 | 結構體 | 初始化 | 銷毀 | | --- | --- | --- | | AVFormatContext | avformat_alloc_context() | avformat_free_context | | AVIOContext| avio_alloc_context() | | | AVStream| avformat_new_stream() | | | AVCodecContext| avcodec_alloc_context3() | | | AVFrame| av_frame_alloc() av_image_fill_arrays() | av_frame_free()| | AVPacket | av_init_packet()av_new_packet() | av_free_packet()| ``` AVFormatContext:統領全局的基本結構體。主要用于處理封裝格式(FLV/MKV/RMVB等)。 AVIOContext:輸入輸出對應的結構體,用于輸入輸出(讀寫文件,RTMP協議等)。 AVStream,AVCodecContext:視音頻流對應的結構體,用于視音頻編解碼。 AVFrame:存儲非壓縮的數據(視頻對應RGB/YUV像素數據,音頻對應PCM采樣數據) AVPacket:存儲壓縮數據(視頻對應H.264等碼流數據,音頻對應AAC/MP3等碼流數據) ``` 包含頭文件還有連接器=》輸入=》附加依賴項 ``` avcodec.lib;avformat.lib;avutil.lib;avdevice.lib;avfilter.lib;postproc.lib;swresample.lib;swscale.lib; ```
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