Posted: 2006-07-20T08:10:08-07:00
Try -sampling-factor 2x2 to your command line to produce 4:2:2 YUV image format. You may need to specify -depth 8 as well.
Use https://github.com/ImageMagick/ImageMagick/discussions instead.
http://www.imagemagick.org/discourse-server/
http://www.imagemagick.org/discourse-server/viewtopic.php?t=7026