jit.qt.grab uyvy quality and jit.gl processing

Oct 15, 2010 at 3:08pm

jit.qt.grab uyvy quality and jit.gl processing

[EDIT: sorry I just realized this ended up in the max/msp forum, but I can figure out how to move it? moderator? help...pls]

Hi, this relates to the following post, but is of a different topic: http://cycling74.com/forums/topic.php?id=28955

What I am trying to do is to maintain highest quality throughout starting with the jit.qt.grab object, while creating the most efficient patch.

So if i use jit.qt.grab @colormode uyvy, I end up with half vertical resolution which ends up looking pretty poor on fullscreen output, even on a videoplane and interpolated.

If i use jit.qt.grab in argb colormode, and then use a cc.rgba2uyvy.jxs to convert to uyvy, I maintain the resolution, yet some of the compositing slab fail when the colormode is set to uyvy yet others work, so I am stumped.

I could change the jit.qt.grab @colormode uyvy and @dim 1440 480 to oversample so effectively oversampling, and the quality looks good, but it looks like it really works the cpu hard.

Am i over complicating things, or is there a bug in the colormode conversion slab, or what am i doing wrong? or am i best to stay in argb colormode for compositing and then convert to uyvy?

the original patch is in the post above.

thanks for any help in advance….

Oct 15, 2010 at 8:27pm

Detailed reply in your original thread.




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