Function ffmpeg_sys_next::av_tempfile

pub unsafe extern "C" fn av_tempfile(
    prefix: *const c_char, 
    filename: *mut *mut c_char, 
    log_offset: c_int, 
    log_ctx: *mut c_void
) -> c_int

Wrapper to work around the lack of mkstemp() on mingw. Also, tries to create file in /tmp first, if possible. *prefix can be a character constant; *filename will be allocated internally. @return file descriptor of opened file (or negative value corresponding to an AVERROR code on error) and opened file name in **filename. @note On very old libcs it is necessary to set a secure umask before calling this, av_tempfile() can't call umask itself as it is used in libraries and could interfere with the calling application. @deprecated as fd numbers cannot be passed saftely between libs on some platforms