英语翻译#if FF_API_ALLOC_CONTEXT/*** Allocate an AVCodecContext and set its fields to default values.The* resulting struct can be deallocated by simply calling av_free().** @return An AVCodecContext filled with default values or NULL on failure.*

英语翻译#if FF_API_ALLOC_CONTEXT/*** Allocate an AVCodecContext and set its fields to default values.The* resulting struct can be deallocated by simply calling av_free().** @return An AVCodecContext filled with default values or NULL on failure.*
英语翻译
#if FF_API_ALLOC_CONTEXT
/**
* Allocate an AVCodecContext and set its fields to default values.The
* resulting struct can be deallocated by simply calling av_free().
*
* @return An AVCodecContext filled with default values or NULL on failure.
* @see avcodec_get_context_defaults
*
* @deprecated use avcodec_alloc_context3()
*/
attribute_deprecated
AVCodecContext *avcodec_alloc_context(void);
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
* we WILL change its arguments and name a few times!*/
attribute_deprecated
AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
/**
* Set the fields of the given AVCodecContext to default values.
*
* @param s The AVCodecContext of which the fields should be set to default values.
* @deprecated use avcodec_get_context_defaults3
*/
attribute_deprecated
void avcodec_get_context_defaults(AVCodecContext *s);
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
* we WILL change its arguments and name a few times!*/
attribute_deprecated
void avcodec_get_context_defaults2(AVCodecContext *s,enum AVMediaType);
#endif

英语翻译#if FF_API_ALLOC_CONTEXT/*** Allocate an AVCodecContext and set its fields to default values.The* resulting struct can be deallocated by simply calling av_free().** @return An AVCodecContext filled with default values or NULL on failure.*
如果ff_api_alloc_context #
**
*分配一个avcodeccontext并设置其领域为默认值.的
*结构可以通过简单的调用av_free()释放.
*
返回一个avcodeccontext填充默认值或空的失败.
*“看avcodec_get_context_defaults
*
*”被使用avcodec_alloc_context3()
*
attribute_deprecated
avcodeccontext * avcodec_alloc_context（无效）；
**此功能尚未公共API的一部分!
*我们会改变它的参数和名字几次!*
attribute_deprecated
avcodeccontext * avcodec_alloc_context2（枚举avmediatype）；
**
*设置给出avcodeccontext到域的默认值.
*
* @param的avcodeccontext的领域应设置为默认值.
*”被使用avcodec_get_context_defaults3
*
attribute_deprecated
无效的avcodec_get_context_defaults（avcodeccontext *）；
**此功能尚未公共API的一部分!
*我们会改变它的参数和名字几次!*
attribute_deprecated
无效的avcodec_get_context_defaults2（avcodeccontext *,枚举avmediatype）；
如果#