Posted: 2006-06-23T12:42:40-07:00
Try adding -depth 8 to your command line before the YUV input image filename.
Use https://github.com/ImageMagick/ImageMagick/discussions instead.
http://mirror.imagemagick.org/discourse-server/
http://mirror.imagemagick.org/discourse-server/viewtopic.php?t=6839