[FFmpeg-user] Help pix_fmt yuv422 doesnt work

[Kieran O Leary]

On Tue, Nov 3, 2015 at 5:28 PM, Rio Kierkels <riokierkels at gmail.com> wrote:
> You can't, DPX is not a YCbCr style format. It will always set it to some
> form of 444 RGB/BGR format.
> Why would you need a 422 DPX format?
>

I've only ever worked with RGB DPX files in ffmpeg, but it's
interesting that the Library of Congress lists YCbCr as one of the
potential components.
http://www.digitalpreservation.gov/formats/fdd/fdd000178.shtml#identification
"Each DPX file represents a single image with a single component,
e.g., luma, or multiple components, e.g., red, green, blue; or Cb, Y,
Cr (chrominance-luminance data)."

Imagemagick also appears to support YCbCr in DPX?
http://www.imagemagick.org/script/motion-picture.php

There is a list of YCbCr formats listed in the header info, but this
could just be provenance info rather than actual information about the
file?
http://www.fileformat.info/format/dpx/egff.htm#DPX-DMYID.3