What is the format of the origin data from the scrcpy socket

[caimaoy]

py-scrcpy/scrcpy_client.py

Lines 150 to 155 in c184567

	ffmpegCmd = [FFMPEG_bin, '-y',
	'-r', '20', '-i', 'pipe:0',
	'-vcodec', 'rawvideo',
	'-pix_fmt', 'rgb24',
	'-f', 'image2pipe',
	'pipe:1']

What is the format, vcode, pix_fmt of the input, besides the metadata?