FFMPEG结构体分析之AVFrame

AVFrame结构体一般用于存储解码后的原始数据（即非压缩数据，例如对视频来说是YUV，RGB，对音频来说是PCM），此外还包含了一些相关的信息。比如说，解码的时候存储了宏块类型表，QP表，运动矢量表等数据。

AVFrame 结构体定义位于libavutil/frame.h中，如下 /*** This structure describes decoded (raw) audio or video data.** AVFrame must be allocated using av_frame_alloc(). Note that this only* allocates the AVFrame itself, the buffers for the data must be managed* through other means (see below).* AVFrame must be freed with av_frame_free().** AVFrame is typically allocated once and then reused multiple times to hold* different data (e.g. a single AVFrame to hold frames received from a* decoder). In such a case, av_frame_unref() will free any references held by* the frame and reset it to its original clean state before it* is reused again.** The data described by an AVFrame is usually reference counted through the* AVBuffer API. The underlying buffer

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