Hi, since the ffmpeg consumer changed several versions back, the frame size is not defined in an rtmp stream (if I remember correctly ffprobe sees it as -1*-1 and YouTube as 65535*65535), and that might be the problem. When I was dealing with this myself, people here recommended me using udp output and then repackaging it to rtmp using standard ffmpeg. Link to that topic is here: Rtmp streaming problems