pub unsafe extern "C" fn avformat_alloc_context() -> *mut AVFormatContext展开描述
Allocate an AVFormatContext. avformat_free_context() can be used to free the context and everything allocated by the framework within it.
pub unsafe extern "C" fn avformat_alloc_context() -> *mut AVFormatContextAllocate an AVFormatContext. avformat_free_context() can be used to free the context and everything allocated by the framework within it.