Function av_log_format_line

pub unsafe extern "C" fn av_log_format_line(
    ptr: *mut c_void,
    level: c_int,
    fmt: *const c_char,
    vl: *mut __va_list_tag,
    line: *mut c_char,
    line_size: c_int,
    print_prefix: *mut c_int,
)