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1. typedef?struct?AVFormatContext?{??
2. ????struct?AVInputFormat?*iformat;??
3. ????void?*priv_data;??
4. ??????
5. ????ByteIOContext?*pb;??
6. ????unsigned?int?nb_streams;??
7. ????AVStream?*streams[MAX_STREAMS];??
8. }?AVFormatContext;??
9. ??
10. ??
11. struct?AVStream?{??
12. ????int?index;????/**<?stream?index?in?AVFormatContext?*/??
13. ????int?id;???????/**<?format-specific?stream?ID?*/??
14. ????AVCodecContext?*codec;?/**<?codec?context?*/??
15. ????AVRational?time_base;??
16. struct?AVCodecParserContext?*parser;??
17. }?AVStream;??
18. struct?AVCodecContext?{??
19. ????uint8_t?*extradata;??
20. int?extradata_size;??
21. ????AVRational?time_base;??
22. int?width,?height;??
23. enum?PixelFormat?pix_fmt;??
24. ????/*?audio?only?*/??
25. int?sample_rate;?///<?samples?per?second??
26. int?channels;????///<?number?of?audio?channels??
27. char?codec_name[32];??
28. enum?CodecType?codec_type;?/*?see?CODEC_TYPE_xxx?*/??
29. enum?CodecID?codec_id;?/*?see?CODEC_ID_xxx?*/??
30. ????unsigned?int?codec_tag;??
31. ????struct?AVCodec?*codec;??
32. void?*priv_data;??
33. }?AVCodecContext;??
34. AVCodec?{??
35. int?(*init)(AVCodecContext?*);??
36. int?(*encode)(AVCodecContext?*,?uint8_t?*buf,?int?buf_size,?void?*data);??
37. int?(*close)(AVCodecContext?*);??
38. int?(*decode)(AVCodecContext?*,153); font-weight:bold; background-color:inherit”>void?*outdata,87); font-weight:bold; background-color:inherit”>int?*outdata_size,??
39. ??????????????????const?uint8_t?*buf,87); font-weight:bold; background-color:inherit”>int?buf_size);??
40. }??

http://blog.csdn.net/mydeardingxiaoli/article/details/17168899