pub unsafe extern "C" fn avcodec_open2(
avctx: *mut AVCodecContext,
codec: *const AVCodec,
options: *mut *mut AVDictionary,
) -> c_int
pub unsafe extern "C" fn avcodec_open2(
avctx: *mut AVCodecContext,
codec: *const AVCodec,
options: *mut *mut AVDictionary,
) -> c_int