[Libav-user] what is the -pix_fmt for AYUV?

[gstream at ccc2.com]

Hi All,
I have listed my pix_fmts available on my encoder but can not work out
what ones match the FOURCC codes used by other applications. Can someone
advise what the rawvideo AYUV equivalent is for ffmpeg and how I work out
what the others are in fourcc.

-pix_fmts
IO... yuv420p                3            12
IO... yuyv422                3            16
IO... rgb24                  3            24
IO... bgr24                  3            24
IO... yuv422p                3            16
IO... yuv444p                3            24
IO... yuv410p                3             9
IO... yuv411p                3            12

gstreamer
i420             - GST_VIDEO_FORMAT_I420                           yv12   
         - GST_VIDEO_FORMAT_YV12
yuy2             - GST_VIDEO_FORMAT_YUY2
uyvy             - GST_VIDEO_FORMAT_UYVY
ayuv             - GST_VIDEO_FORMAT_AYUV


For example on www.fourcc.org/yuv.php

AYUV
This is a 4:4:4 YUV format with 8 bit samples for each component along
with an 8 bit alpha blend value per pixel.

how do I find the matching pix_fmt?

ultimately I am looking to save the output from ffmpeg to rawvideo and
import it into GST without having to reconvert it to AYUV for internal
processing.

any thoughts or suggestions?

many thx
Art