Always get 0 (zero) from this call **stream.CodecContext().CodecType()**

[kaharman]

I use this function from example
func firstVideoStream(fmtCtx *avformat.Context) *avformat.Stream { for _, stream := range fmtCtx.Streams() { switch stream.CodecContext().CodecType() { case avutil.MediaTypeVideo: return stream } } return nil }

Why I always get 0 (zero) from this call stream.CodecContext().CodecType()? Test with type data video, image, text, etc.