[FFmpeg-user] how to output yuv raw video data by ffserver

[Soho Soho123]

Hi All,

I have a webcam suppoty yuyv422 and mjpeg format.
I have tested mjpeg format when ffserver output test.mjpeg stream.It can work .
But curentlly,
I would like to output yuyv raw video.
Can someone have idea about:
how to output yuyv rawvideo stream by ffserver?
in ffserver.conf:

<Stream test.yuv>
Feed feed1.ffm
Format ????  ===>which format I can use for the stream?


VideoSize 640x480
VideoFrameRate 30
VideoCodec yuv4
NoAudio
</Stream>