Function rsmpeg::ffi::av_opt_ptr

pub unsafe extern "C" fn av_opt_ptr(
    avclass: *const AVClass, 
    obj: *mut c_void, 
    name: *const i8
) -> *mut c_void

@} Gets a pointer to the requested field in a struct. This function allows accessing a struct even when its fields are moved or renamed since the application making the access has been compiled,

@returns a pointer to the field, it can be cast to the correct type and read or written to.