Kieran O Leary wrote: >On Tue, Nov 3, 2015 at 5:28 PM, Rio Kierkels <riokierk...@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
This may also be of interest: "SMPTE 268M-2003 Specification Inadequacies" by Bob Friesenhahn (2005) http://www.simplesystems.org/users/bfriesen/dpx/dpx-issues.pdf Best regards from Reto _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
