我正在尝试通过Nginx的FFmpeg上的RTMP进行直播。做sudo ffmpeg -re -f video4linux2 -i test.mp4 -vcodec libx264 -vprofile baseline -acodec aac -strict -2 -f flv rtmp://localhost/show/stream
会给我ioctl(VIDIOC_QUERYCAP): Inappropriate ioctl for device
test.mp4: Inappropriate ioctl for device
我什至正确吗?