[FFmpeg-user] Help pix_fmt yuv422 doesnt work

Reto Kromer lists at reto.ch
Wed Nov 4 13:41:40 CET 2015

Kieran O Leary wrote:

>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.
>"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?
>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

This may also be of interest:

"SMPTE 268M-2003 Specification Inadequacies" by Bob Friesenhahn (2005)

Best regards from Reto

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