Why I like YUV over RGB /// NOT FOR DIALUP USERS

grayplague · Post by **grayplague** » Wed Nov 06, 2002 11:03 pm

The pics on the left are from XviD encodes done YUV->RGB->YUV.

The pics on the right are from XviD encodes done YUV->YUV

Aren't they more purdy on the right.

jonmartensen · Post by **jonmartensen** » Wed Nov 06, 2002 11:31 pm

You make an excellent argument worth 5000 words

Chaos Angel · Post by **Chaos Angel** » Wed Nov 06, 2002 11:59 pm

There's some pixellation on Kenshin's blade, and the frames need to be clipped. It looks trashy.

Naw, I'm just being an ass.

I've been trying to decipher the new Guide's instructions for encoding an AVI with XviD. I've been using TMPEGEnc to make MPEGS, and I like MPEGS since they are so easily compatible and don't need extra crap to watch them, but I'm attracted to the small size of XviD AVIs.

Small files + good picture quality = fuck yes

I know return you to your regularly scheduled forum browsing, already in progress

klinky · Post by **klinky** » Thu Nov 07, 2002 2:03 am

Ahh yesh, but Premiere only does RGB :O You're screwed sire if you wanna to any sort of editing.

~klinky

Rozard · Post by **Rozard** » Thu Nov 07, 2002 8:45 am

Are there any popular editing programs that edit in YUV?

trythil · Post by **trythil** » Thu Nov 07, 2002 2:07 pm

Rozard wrote:Are there any popular editing programs that edit in YUV?

http://www.heroinewarrior.com/cinelerra.php3

I know, I know: it's not popular, and you guys are getting damned tired of seeing that goddamned URL. But, hey, it DOES edit in YUV

RadicalEd0 · Post by **RadicalEd0** » Thu Nov 07, 2002 3:11 pm

yeah but what kind of effects can you do with it? Cuz I know from a programming standpoint making special effects is hella hard to do in yuv as opposed to rgb
I'm surprised there was that much of a difference in the pictures though :O

grayplague · Post by **grayplague** » Thu Nov 07, 2002 7:44 pm

klinky wrote:Ahh yesh, but Premiere only does RGB :O You're screwed sire if you wanna to any sort of editing.

~klinky

actually Im talking about after the editing is done. All those screen caps where taken after the editing in premiere, and just compressed to xvid in different manners.

what i should have said was:

left ones: YUV->RGB(premiere)->YUV->RGB->YUV(scr cap)
right ones: YUV->RGB(premiere)->YUV->YUV(scr cap)

even with the initial RGB conversion in premiere, by eliminating a second one, the quality, and color, is greatly improved.

-steve

FurryCurry · Post by **FurryCurry** » Thu Nov 07, 2002 8:23 pm

Those pictures are excellent, they really do a good job showing the difference.

If it were me, I'd think this fits better in General video, rather than off topic, as it seems very relevant to obtaining the best possible results for one's amv's.

I'm lucky I saw this, as I rarely come into the OT forums.

trythil · Post by **trythil** » Thu Nov 07, 2002 9:10 pm

RadicalEd0 wrote:yeah but what kind of effects can you do with it? Cuz I know from a programming standpoint making special effects is hella hard to do in yuv as opposed to rgb
I'm surprised there was that much of a difference in the pictures though :O

I can't think of any fundamental block that would prevent you from doing something in RGB colorspace but not in YUV colorspace.

An easy way out would just be to provide an RGB <-> YUV conversion interface. It's obviously not the ideal thing to do, but if you have enough bits per channel to work with, you can minimize the damage done.

From what I've read of the Cinelerra compositing engine source, I believe that Cinelerra does some of this to simplify things, using YUV/YUVA/RGB/RGBA with either 8 or 16 bits per channel for an internal colormodel, depending on what the user selects.